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eHam Forums => QRP => Topic started by: W4KYR on August 15, 2013, 06:41:56 PM



Title: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W4KYR on August 15, 2013, 06:41:56 PM
New 10 Watt HF Rig from China CW/SSB KN-920

I saw this on E-Bay. I am not connected to this in any way, just passing on info. Looks like the seller is selling it used. He wants $295 and $52 shipping. I see a USB port on the back of it.  The ad says it can be boosted to 20 watts. It has handles on the sides.


http://www.ebay.com/itm/KN-920-HF-all-mode-Transceiver-/200953389562?pt=US_Ham_Radio_Transceivers&hash=item2ec9c161fa



(http://i.ebayimg.com/t/KN-920-HF-all-mode-Transceiver-/00/s/MTIwMFgxNjAw/z/Rb4AAOxyPc5SDXBR/$T2eC16J,!)8E9s4l6BMcBSD(BQmBZw~~60_1.JPG)

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The latest HF transceiver from China origin, the KN-920.

The radio is targeted to QRP operators, as the maximum output of 10 Watts (can be configured up to 20 Watts).

It come with the ICOM HM-36 microphone.


The radio is 99 % percent new, just power up for some QSOs.
RX frequency range: 30 KHz to 29.999999 MHz

TX Bands:
3.500 - 3.9999 MHz
7.000 - 7.300 MHz
10.100 - 10.150 MHz
14.000 - 14.350 MHz
18.068 - 18.168 MHz
21.000 - 21.450 MHz
24.890 - 24.990 MHz
28.000 - 29.700 MHz

Modes: SSB, CW, FM, AM (RX only).
Memories: 100
TX power: 1-10 w continuous adjustable (maximum power can be adjusted, maximum 20 Watts)
LCD screen: Frequency; Power, Mode; S-meter; SWR
Power requirements: RX: 13.8V / 0.7A; TX: 13.8V / 4A
Antenna interface: SO-239
Size: 230 x 230 x 90mm
Weight: 3.5 KG


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: ZENKI on August 16, 2013, 04:29:45 AM
They on the right track by  offering a option of 20 watts. These  types of radios can be very effective for emergency and  portable operation.
A HFMANPACK option would  also be a nice option. A HFMANPACK radio with a strap on wrist panel  using 20 watts would be a lot of fun.

My ideal portable radio with be this configuration.

Lithium Iron  battery operation with 20 to 30 watts of output.
Ability to operate on  90 to 260 volts AC or 10 to 50 volts DC with a DC to DC converter.
When running on DC power or AC power  and not battery power there is another  20 to 30 watt amplifier module that is combined to deliver  40 to 50 watts of output.
A long wire tuner  that can  handle a random wire on any frequency. This tuner should also have a high efficiency whip tuner that can tune something like a 9ft whip on all frequencies. You can find this type of couple design on aircraft, helicopters and many HF manpack radios.
All these options should be clipped onto the main case so you can easily customise and remove them as needed depending on the configuration.
The whole setup should fit into a nice case that  you can take on a aircraft or cruise ship and does not make you look like a street hobo.

This kind of configuration was widely used  around the world in the "jungle radio" or "jungle phone"  roles. If you travel in many places where HF radio is still used you will find this kind of radio configuration that can be thrown into a 4wd, truck, car, boat or plane was widely available or issued. You can also find these kinds of configurations as survival HF radios. While these radios were designed for inexperienced HF users, a ham radio model would require all the sophistication and convenience that hams require.
Its amazing how many radios dont have things like a build in SWR meter, RX antenna socket, amplifier key line and many other basics that hams require. Adding something like a 2 or 4 position antenna switch with BNC connectors is so easy to do but these manufacturers leave it off then they expect you to pack as many accessories that is bulky as the radio itself. It seems  that they go making portable operation as inconvenient as possible rather than making it as convenient as possible. I can grab a military man pack radio in 30 seconds and set it up for operation in 5 seconds flat. Contrast this to the mess of cables and boxes that has to pulled out of the typical hams grab bag and setup before operation. If it was a war all the hams would be shot by snipers they would be exposing themselves so many times going to and from the car to get this and that to put a station on the air.
 
While there are many QRP radios on the market none of them are universal in nature suiting all aspects of portable/mobile.emergency/holiday operation etc

The Yaesu FT897 came the closest but it was far from optimum in terms of flexibility.

Anyway I wish  this company well. Its not receiver performance that makes the ultimate portable radio. Its convenience and features that is more important to a successful portable radio.





Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W4KYR on August 16, 2013, 05:01:07 AM
They on the right track by  offering a option of 20 watts. These  types of radios can be very effective for emergency and  portable operation.
A HFMANPACK option would  also be a nice option. A HFMANPACK radio with a strap on wrist panel  using 20 watts would be a lot of fun.

 I can grab a military man pack radio in 30 seconds and set it up for operation in 5 seconds flat. Contrast this to the mess of cables and boxes that has to pulled out of the typical hams grab bag and setup before operation. If it was a war all the hams would be shot by snipers they would be exposing themselves so many times going to and from the car to get this and that to put a station on the air.
 
While there are many QRP radios on the market none of them are universal in nature suiting all aspects of portable/mobile.emergency/holiday operation etc

The Yaesu FT897 came the closest but it was far from optimum in terms of flexibility.

Anyway I wish  this company well. Its not receiver performance that makes the ultimate portable radio. Its convenience and features that is more important to a successful portable radio.


I am in complete agreement and I been pushing the 'Manpack' concept for quite awhile. Right now the closest we have to a Manpack radio that you can hang on your doorknob all 20 watts ready to go with built in battery, tuner, antenna, and is still being sold is the Vertex VX 1210. But for $1500 to $2200 + new with all the accessories it is pricey.

Hams can use their own radios, tuners, batteries and antennas to assemble their own Manpacks with those 'radio carriers' that they sell on E-Bay for $159+/- or build their own Manpack 'radio carrier'.

I checked E-bay and the radio was sold. But this is a good direction and it might inspire Yaesu to build a self contained Manpack radio with everything for under $1000.  The FT 817 and the FT897 comes very close to being a self contained Manpack but just misses the mark.

The FT897 batteries are optional and expensive, the auto tuner is optional. There is no provision for a portable antenna, but is does put out 20 watts with the batteries.

The FT 817 just needs a built in tuner (and 20 watts) for it to be called a true Manpack as it already runs on batteries and does have a provision to mount an antenna.

I wonder what other new radios will come from China this year. Will we really see a true Manpack radio for under $1000? Or will we just assemble our own with what we have?



Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KB1GMX on August 16, 2013, 10:55:49 AM
Compared to a real manpack the VX1210 is cheaper.

I have a PRC1099 manpack.  With lion battery its still over 20 pounds, though the whip and auto-tuner combo is
very good it's still pretty tepid at 20W and a 10FT whip at 40M without a 33ft wire trailing.  But it is a complete
and self contained station in a box.   

But the idea is right.  Enough power 5/20W, SSB either sideband available, full tuning 1.6 to 29.9999,
BNC output without tuner for resonant antennas and rugged.  The downside is 1980s tech when repairs
are needed, heavy, no speaker (uses handset) and mil style circular connectors.  They are available new but
the price makes the VXlook cheap.

Considering what the VX goes for and current mid range radios thats decent for something  in the class.

What the PRC1099 did for me is allow me to know from use what bands and items
are _must_ have for a self contained portable station.

My must have list  for a self contained portable field radio is:

-80-20M bands  (80, 40 and 20) full tuning flexibility on those bands.
-5W with 10 or 20 Watts for high power variable from 1 W up is best)
-Antenna auto-tuner and a rugged case to mount and support a large (3 M) whip (at271 or similar)
- additional connections for external resonant antenna, Audio IO for soundcard based
   digital modes.
-mic connection (kenwood 8pin is rugged enough)
-speaker not in handset.
-headset jack
- All controls and connections are the front panel.
-SSB and CW capability.
-Enough battery to run a good while on RX/TX and a many days RX only.
- battery charge or run from 12V source (auto or solar) plus AC adaptor.
-waterproof or water resistant or able to survive rain or puddles.
  (water resistant caps on every IO).

-Light, under 20 pounds complete and i'd expect the battery to be most of it!
  Complete means whip, battery and mic and radio.
 
Note variable selectivity, mic gain, passband tuning, RF gain, are not on the list
and not required and in most cases undesirable.  Receiver controls should be
band, tuning, volume, and mode (sideband select/CW) as more controls are
not needed.  Tuning control should be something not easily bumped.  TX controls
are a tune button and maybe a button to use as makeshift CW key.  A spartan panel
and minimal or no menus.  Must be usable when your in the dark, cold, wet, and
tired without a 50 page manual.

What you leave out is handy for smaller lighter radios.  Though complete is nice.
The idea is complete, carried,  and not required to be a contest or main radio.

For short range work HTs in the VHF/UHF range are a a good fill.  There are
many cheap and tiny 5 W HTs.

Good HF radios aren't cheap, unfortunately.  Many include things really not useful
though desirable for home or other uses. 


Allison


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: VE3FAL on September 21, 2013, 03:02:08 PM
I purchased one from Aliexpress and it arrived quickly via FedEx in 5 days from China.
I paid $400.00 US with shipping to my door.
The radio was a bit larger than I expected but looks great with the large display and handles.
Powered radio up and was impressed with size brightness of display.
There is no English manual so some translation of the Chinese manual made things a bit easier but in all there is not much to the buttons and menus.
Buttons are marked and of course all perform a task except for the ATU button which will work with a built in ATU that I guess might be offered for this radio later.
The radio worked well on CW but did not get a chance to operate it on sideband.
The radio draws quite a bit of power and there is no way to turn off the diplay or turn it down.
It works on all ham bands including WARC bands and has a couple of filters in it.
CW speed can be controlled for keyer but cw sidetone volume cant be turned down via menu.
It puts out a full 10 watts on cw into a dummy load using IRF530 finals.

I was able to make about a dozen contacts with the radio on bands from 80-15 when in the middle of a qso on 20 meters the radio quit and my power supply tripped. One of the finals blew and burnt the trace up and it is now in need of repairs.
Dealing with the company in China has been very tedious with communication issues of course. I have been offered no compensation or adequate return or repair policy for this radio. I was told they could refund me the money if I buy replacement finals(which are very cheap as also stated by company), not one reply back from the builder on this radio as well.

The radio looks great and does have potential in the market, but testing and reviews really need to be done before any entrance into the North American markets. I feel like once my money was there that was it.

Save your money and buy an FT817, Alinco DX8SR or something a little bit more pricey but not out of this world pricey, yet you will know you have a warranty and repair service available to you.
Even the X1M is a much more nicer unit when it comes to getting assistance and returns and repairs.

Fred VE3FAL


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KH6AQ on September 21, 2013, 03:16:09 PM
Fred, it was good of you to buy and test this radio and report on it. Does the KN-920 really output 10 watts on 10 meters using IRF-530 MOSFETs?

It appears that dollar-for-dollar it doesn't compare to the lowest price full featured radio, the Alinco DX-SR8T, at $529 delivered.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W7ASA on September 22, 2013, 08:52:23 AM
Hello Fred,

Thank you for posting your hands-on review.  So sorry to hear that it fried and the rude 'not my problem' type response from China. Their suggestion to simply replace the blown final  is -as I am certain that you know - not wise.  First  Finals, as with fuses, blow for reasons and until the reasons are cured, the news ones will blow as well. Secondly: - 'you modified the equipment, so it's not our problem." is likely to be heard later.

>>> If THEY WANT TO SELL electronics, then they must stand behind their product, else they will never get any market share worth noting. Until they understand this, I will be very leery of buying anything from the emerging Chinese HF kit/small production market, for the reasons you have shared with us.

Chinese Manufacturers:  Do the RIGHT thing and sell only reliable equipment & be fair to your customers if there is something wrong. Otherwise we will never buy from you!



73 de Ray
W7ASA ..._ ._






Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: K5TED on September 22, 2013, 09:58:27 AM
Not sure why a $435 ham-band-only, QRP, Chinese rig would be considered a good deal. Look at the price ratio between the WouFeng single band handhelds and a comparably equipped Big 3 handheld. Even the cheapest Alinco dual band handheld is $130. The cheapest BaoXun dual band is $30.

Then look at this very limited KN-920, priced at roughly half the cost of a base KX3, two thirds the cost of a FT-817ND and ask yourself...

IMO, the KN-920, if it could be made to be as reliable as even a simple Chinese handheld, should come in at about $250.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: AD6KA on September 22, 2013, 11:34:42 PM
Not sure why a $435 ham-band-only, QRP, Chinese rig would be considered a good deal. Look at the price ratio between the WouFeng single band handhelds and a comparably equipped Big 3 handheld. Even the cheapest Alinco dual band handheld is $130. The cheapest BaoXun dual band is $30.

Then look at this very limited KN-920, priced at roughly half the cost of a base KX3, two thirds the cost of a FT-817ND and ask yourself...

IMO, the KN-920, if it could be made to be as reliable as even a simple Chinese handheld, should come in at about $250.

I agree, don't see what the fuss is about.
One can do soooo much better.
IRF-530 MOSFETS sounds like a monoband kit rig.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: VE3FAL on September 24, 2013, 04:37:01 AM
Fred, it was good of you to buy and test this radio and report on it. Does the KN-920 really output 10 watts on 10 meters using IRF-530 MOSFETs?

It appears that dollar-for-dollar it doesn't compare to the lowest price full featured radio, the Alinco DX-SR8T, at $529 delivered.

Surprisingly enough it did a full 10 watts from 10-160 meters...
Also, on the mono-band comment, when I asked for a schematic, I got the schematic for the KNQ10A and was told same finals 99%. So I could use that to figure out my issue.

As far as other comments go, save your money, buy a full feature rig and enjoy....


Fred
VE3FAL


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: VE3FAL on December 08, 2013, 06:58:51 AM
So it is December 2013 and there was NO RESOLVE from the seller and no communication with the builder. They sent me 3 sets of MOSFETS to replace (2 of the three sets also blew and burnt the traces), then they insist I send it back (would cost me $100 to ship so that wont happen), if builders issue they would cover repairs (not shipping), if my issue I pay. The sellers concern is his little amount of money he makes on the transaction to give me even a partial refund. I told him his profit means nothing to me but that I now have a $400 door stop.
Since then because of no resolve on this issue he is not able to sell this radio. It is likely that there will be no resolve as I will not pay to have this unit sent, and then have them turn around and say the problem was caused by me and have to cover repair and shipping back.
So be aware folks, problem is we are costly beta testers for lots of this stuff. Research folks before you buy. my intention was to get the radio, use and review it and make an operating manual in case they had a decent product.
Sorry this review could not be positive for those who may have been looking at this unit..

Cheers
Fred VE3FAL


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: OH6I on December 08, 2013, 08:11:45 AM
After I have buy then new Icom 756 Pro, Kenwood 870 S, Kenwood 570, Yaesu 1000MP and everyone have faults and needed to send back I decide to wait at least one year when new radio hit the market...

Jari
OH6I


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: VE3FAL on March 01, 2014, 07:24:20 PM
Yea guys stay away from this radio and those who sell it. The seller from Aliexpress as of March 2014 still has not answered any of my messages or given me a resolve to the problems associated with this radio. It is not ready for the market for which we are used to. I continue to send messages to promotions and security at Aliexpress and so far they have prevented the seller from selling this unit.

Stay with those who offer valid warranties and support. As I stated I like to try new things and help with reviews and writing of operating manuals and that was my hope for the KN-920, but that went the opposite way in this case.

73

Fred
VE3FAL


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KB1GMX on March 02, 2014, 11:39:38 AM
Its unfortunate that the radio failed.

IRF530s do work at 10M, in fact I've gotten more power than that at 6M from them
as an experiment.  Not my first choice but functional part. 

However, the board design and the circuit is a mystery (no published picture or schematic)
so commenting on why or what is not possible.  The failure could have been incidental
as in infant mortality, fundamental design error, or just really bad SWR.  The board loosing
the traces is fixable though not pretty, wire is the fix.

The power needs may be the LO system(DDS), micro to do user interface, and the backlit display,
or it could have been the finals with wrong biasing.  I'll bet all.  Those little things like lights
and bright displays eat power.

With refinement it could be something. 


Allison



Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: VE3FAL on March 11, 2014, 03:13:56 AM
The information given to me by way of schematics was for the KNQ10 radio and was told it was indeed the same circuit design.
Oh yea traces were fixed with wire but definitely other issues with the radio.
I know it is not an SWR issue as all antennas in the shack are tuned with a 1.2:1 swr for the bands I operate, as well I have a tuner inline just incase I do have an issue.
The second time the radio popped was in a dummy load, just as I started bring the power up to check the radio out.

Fred
VE3FAL


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: K8AXW on March 11, 2014, 08:36:18 AM
Apparently China isn't ready for "prime time!"  The Japanese went through this very thing and created the iconic saying, "Japanese Junk."

In the meantime if everyone would refrain from buying this "Chinese Junk" then it would speed things up a bit.  Assuming of course that they can get FCC approval.  I just hope that part isn't political like everything else.

As an aside:  I have and do buy Chinese stuff, but only "stuff" that I can throw away without feeling raped.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W1JKA on March 11, 2014, 02:14:45 PM
Re: K8AXW

  I agree with your last sentence, Fire crackers (take safety precautions), Kites (that just manage to last a 2 day visit from the grand kids) and those BumFunk (sic) vhf/uhf radios all fit the bill for worthwhile Chinese products.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KE7TMA on March 12, 2014, 11:08:22 PM
Re: K8AXW

  I agree with your last sentence, Fire crackers (take safety precautions), Kites (that just manage to last a 2 day visit from the grand kids) and those BumFunk (sic) vhf/uhf radios all fit the bill for worthwhile Chinese products.


Seems like a lot of people like their Baofeng radios.  They are built to a price point, sure, but they seem to work.

Seems like lots of people also like their automobiles, TVs, computers, cell phones, stereos, toasters, and all the other products that mainly come from China these days.  Sure, lots of it is crap but that's what people want.  China knows its market.  Bear in mind, though, that the fact that they produce a lot of junk doesn't prove that they are incompetent.  After all, they can shoot a man into space a we can't.  This is a great shame on the USA, and a pretty big symbol of our decline.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: K8AXW on March 13, 2014, 08:55:08 AM
TMA: 
Quote
After all, they can shoot a man into space a we can't.  This is a great shame on the USA, and a pretty big symbol of our decline.

Would you mind revealing what planet you just came from? 

If you followed the first page + of this post the problem was getting information and or service for a piece of Chinese gear.  Unless I misread this whole post, the transceiver crapped out, the OP repaired it to only fail again and the company basically said, "Don't bother me!"

Indeed this country does consume a great deal of Chinese stuff.....of all flavors.  And for the most part it performs fine.  Then the question eventually arises, "Who fixes this stuff?"  The answer is, "Nobody."  Throw it away!

Consumer electronics is one thing but the ham community has a history and built in reluctance to throw ham gear away.....even gear that is decades old.  They especially choke up on throwing away a piece of new gear because the final transistors failed.  Even if it's cheap!

I repeat, China isn't ready for prime time yet!





Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KE7TMA on March 13, 2014, 12:33:51 PM
TMA: 
Quote
After all, they can shoot a man into space a we can't.  This is a great shame on the USA, and a pretty big symbol of our decline.

Would you mind revealing what planet you just came from? 

If you followed the first page + of this post the problem was getting information and or service for a piece of Chinese gear.  Unless I misread this whole post, the transceiver crapped out, the OP repaired it to only fail again and the company basically said, "Don't bother me!"

Indeed this country does consume a great deal of Chinese stuff.....of all flavors.  And for the most part it performs fine.  Then the question eventually arises, "Who fixes this stuff?"  The answer is, "Nobody."  Throw it away!

Consumer electronics is one thing but the ham community has a history and built in reluctance to throw ham gear away.....even gear that is decades old.  They especially choke up on throwing away a piece of new gear because the final transistors failed.  Even if it's cheap!

I repeat, China isn't ready for prime time yet!

While hams may not like to throw away electronics because of failed components, this is how it's done now.  Surface mounted parts and specialty ICs which may not even be available as spares ensure that things are hard to fix.  Despite all this they have overtaken the USA in many of the important prestige areas such as space travel.  They also have stealth fighters now, no doubt using all the R&D done in the USA over the last 4 decades.  They have also overtaken the USA in manufacturing.  In fact, I would wager that China could ruin us without firing a shot, merely by just stopping all US-bound container ships.

This should all be a source of great shame for every American.  Those who benefit the most will move on once the husk is completely drained of all nutrition, leaving this place a wreck.  It'll happen again, too, unless we learn our lesson.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: K8AXW on March 13, 2014, 03:55:12 PM
your presentation is so full of holes it doesn't even warrant a response.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KE7TMA on March 13, 2014, 05:11:15 PM
your presentation is so full of holes it doesn't even warrant a response.

You're right - China doesn't manufacture most of our products, they don't have a manned space program, and they don't have stealth fighters either.

The cognitive dissonance is strong with you.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W1JKA on March 14, 2014, 02:12:00 AM
"Cognitive Dissonance" I'll have to look that one up  ;)


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: K8AXW on March 14, 2014, 08:47:07 AM
JKA:  Ain't sure but I think "Cognitive Dissonance" is why I have to change underwear on occasion.  Let me know what you find.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W1JKA on March 14, 2014, 09:29:44 AM
Re: K8AXW

  Still having trouble spelling it right to even look up, until I do I'm thinking it might have something to do with Resonance  between antenna and tuner as the poster seems to be a little off frequency.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KE7TMA on March 15, 2014, 09:47:49 PM
Re: K8AXW

  Still having trouble spelling it right to even look up, until I do I'm thinking it might have something to do with Resonance  between antenna and tuner as the poster seems to be a little off frequency.

Would you care to argue a certain point or are you just blowing smoke?  Please dispute one of the points I made if you think you can do so usefully.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W1JKA on March 16, 2014, 05:10:23 AM
Re: KE7TMA  reply #25

  It appears to be feeding time at the bridge. While awaiting a few more crumbs that may possibly come your way I suggest you stay under it and bide your time wisely by doing a little research on where Eagle 1 landed ( Moon or the Nevada high desert?) your choice, or what country via NASA played a major role in operating a shuttle service to the ISS.

  If or when your research is completed you may want to consider taking a 180 degree tack and head back upstream to the original Topic.

 




 


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: K8AXW on March 16, 2014, 06:37:22 AM
JKA:  Man, you're feeding the troll the good stuff!  Save it.  They'll eat anything!!


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W1JKA on March 16, 2014, 07:22:37 AM
Re: K8AXW

  Good Stuff ??, hell, those are my floor sweepings, I hold the "good stuff" in reserve for the truly deserving and starving. Got to get ready for church CUL.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KE7TMA on March 16, 2014, 05:04:31 PM
Re: KE7TMA  reply #25

  It appears to be feeding time at the bridge. While awaiting a few more crumbs that may possibly come your way I suggest you stay under it and bide your time wisely by doing a little research on where Eagle 1 landed ( Moon or the Nevada high desert?) your choice, or what country via NASA played a major role in operating a shuttle service to the ISS.

  If or when your research is completed you may want to consider taking a 180 degree tack and head back upstream to the original Topic.

So it's clear that you don't want to address the issues I have raised, or even think about them.  Tell me, what's the next scheduled shuttle payload, and how many astronauts are heading to the ISS on that launch?

I know it's painful to see our once great nation swirling down the bowl, but we can't improve the situation with delusions of greatness from the 1960s.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W4KYR on June 16, 2014, 03:37:09 AM


I realize that this is an old thread. However this is a followup to the "New 10 Watt HF Rig from China CW/SSB KN-920" thread.

On ebay there is a 20 watt version of the KN-920 on sale for $400. Disclaimer: I have no connection to this ebay listing whatsoever, this is strictly FYI because there is an interest in this radio.

This 20 watt version is used as the seller says that the radio is a "IT IS A 9.5 OUT OF 10! VERY NEAR MINT. YOU WON'T FIND A NICER ONE”

I currently have no information on where a brand new model with a warranty can be purchased at. Maybe someone can add that information to this thread.

http://www.ebay.com/itm/KN920-MINT-MULTI-MODE-160-10M-QRP-20-WATT-TRANSCEIVER-LATEST-CHINESE-TECHNOLOGY-/151327508209?pt=US_Ham_Radio_Transceivers&hash=item233bd286f1


Seller's Description

"THIS AMAZING RADIO IS VERY VERSITILE THAT IMPRESSED ME WITH ITS SENSITIVITY AND PRECISION TUNING. IT PUTS OUT OVER 20 WATTS (AN EXTRA MOD UP FROM 10W), RECEIVES FROM STANDARD AM BROADCAST TO 30MHZ. THE FACTORY MUST HAVE A MOD TO MAKE IT TRANSMIT FROM 1.8-30MHZ(MARS MOD). NOW, IT IS HAM BANDS ONLY. A BUILT IN AUTOMATIC KEYER WORKS FINE FOR CW. WITH FM MODE, A TONE BOARD COULD BE ADED FOR 10M REPEATERS. IT COMES WITH AN ICOM HAND MIKE WITH UP/DOWN BUTTONS, POWER CORD, AND MANUAL THAT HAS BEEN ANOTATED BY ME TO HELP YOU OVER THE CHINGLISH. THIS RADIO IS VERY LIGHT WEIGHT, BUT SEEMS VERY SOLID TO THE USER. A VERY MENU DRIVEN UNIT. NO RETURNS BECAUSE OF PARTS PIRATES OR DAMAGE COULD BE DONE BY UNEXPERIENCED HANDS. A FUNCIONAL RADIO, SO BID WITH CONFIDANCE! THIS IS NOT FOR THE BEGINNING HAM UNLESS HE HAS SOMEONE TO GET HIM STARTED. THEN IT OPERATED SMOOTHLY WITH 5 FRONT PANEL BUTTONS. IT ALSO HAS MEMORY TO STORE SEVERAL FREQUENCIES WITH THE MODE INCLUDED"


(http://i.ebayimg.com/00/s/MTE5NVgxNjAw/z/SQAAAOSwq5lTm6R-/$_57.JPG)



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Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W1JKA on June 16, 2014, 04:15:30 AM
  Sounds like a hell of a deal, apparently the seller was so impressed with it's attributes ( 9.5 out of 10) that he wants to get rid of it.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W4KYR on June 16, 2014, 04:21:02 AM
  Sounds like a hell of a deal, apparently the seller was so impressed with it's attributes ( 9.5 out of 10) that he wants to get rid of it.

Yes, and there are 32 watchers and no one is bidding on it.....

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Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: REMOVED_ACCOUNT_2015-01-09 on June 19, 2014, 11:50:56 AM
Will never purchase any radio from the Chi-Comm's. They hack into many American companies and steal their documents and secrets and they are the greatest copiers the world has ever seen. Why would you want to do business with thieves.

john


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W4KYR on June 20, 2014, 04:13:56 PM
Hah, someone bid on the 20 watt KN-920. $299 with 2 hours 40 min to go


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: K8AXW on June 20, 2014, 07:23:19 PM
Like PT Barnum said, "One born every minute and two to take him!" 


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: AF7EC on June 20, 2014, 11:50:29 PM
(http://www.pismotek.com/rblinux/yuckfont.png)
If someone gave me one of these radios, I'd remove all of the existing labels and use a much nicer font!  I know it might sound silly, but seems like a lot of Chinese products have that ugly Serif font.  ???


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: W4KYR on June 21, 2014, 02:21:10 AM
Only one person bid on it for $299.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KC2UGV on June 24, 2014, 04:36:05 AM
Will never purchase any radio from the Chi-Comm's. They hack into many American companies and steal their documents and secrets and they are the greatest copiers the world has ever seen. Why would you want to do business with thieves.

john

This radio is made by a ham in China.  So, you're more or less calling a ham op a thief there.  Just sayin'


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KA5PIU on June 24, 2014, 08:11:48 AM
Hello.

First off the IRF510 is used as a replacement for the 2SC1969 and is THE preferred CB transistor for the "New" Cobra 29 mods.
Second, this radio is also sold as a kit.
5 watt or 10 watt, just solder in the second transistor.
http://www.radiovilag.hu/images/IRF510.pdf
http://www.aliexpress.com/item/Whole-ham-kn920-kn-920-utrashort-wave-ham-radio-station-equipment-shiortwave-SW-free-shipping/1075987935.html
There is a design flaw that will require its redesign.
It was to modulate the finals for AM, just like a cobra 29.
They had problems.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: K1DA on June 26, 2014, 08:47:30 AM
   I believe the Chinese encourage the production of hand helds because they are in so much use in industry in general, from construction to security.  I doubt we will see really good HF  gear from the Chinese until the government changes it's attitude toward the  average Chinese having  unrestricted contact with the outside world.  Until there is an active HF CHinese radio presence outside of the few places HF is now permitted the domestic demand and hence the production numbers  and attendant cost reductions will not happen.   The interesting thing is that despite NO apparent regulation either way, "CB" is alive and well in China. 



Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: KA5PIU on June 26, 2014, 03:38:03 PM
Hello.

Not only is CB alive and well in China, there are some impressive radios.
24.5 MHz is the official lower limit and 32. 5 MHz is the official upper limit.
No radio can do more than 25 watts and no amplifier may do more than 150 watts.
You do need a permit for an amplifier, failure to secure a permit will lead to loss of equipment.
Again, 24.5 MHz to 32.5 MHz, no super multi band radios for the masses.
136 to 174 and 400 to 512 MHz is also fine.
5 watts VHF and 4 watts UHF for a portable with 60 watts for mobiles is permitted.
External amplifiers for VHF and UHF are prohibited.


Title: RE: New 10 Watt HF Rig from China CW/SSB KN-920
Post by: OK1RP on July 29, 2014, 01:36:46 PM
Hi,

the experiences of Fred, VE3FAL is typical for any kind of chinesse junks!
Does not mattercif it is kn-920 or x1m or hb's or so... Clics, blowing finals, modulation issues, not finished s/w, useless keying/timming, bugs and even bad designs of important blocks...etc.
Unfortunatelly there is still enough people for buying these crapies from chinesse copycats.

Please open Your eyes and believe to US producers or Japanesse manufacturers. Support small but high quality and clever designs comes from US, EU...

Thank You for reading it and at least thinking about.

Good luck, 73 - Petr, ok1rp