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1  eHam Forums / Software Defined Radio / RE: Flex Radio 1500 - Great Radio for the money Part Deux on: January 20, 2013, 12:33:53 AM
I use an older Dell GX520 3ghz machine running Win XP Pro with my 1500. Average CPU usage is 22% while running PowerSDR and I have no issues whatsoever. I often leave it running in the background for listening while I do other things for hours on end and it never freezes nor chops audio. I also get consistently good TX audio reports.

This computer cost me $80 used. Flex 1500 cost me $650. Added a used RM Italy HLA-150 100w amp for $234. Total cost = $964 for a fantastic SDR HF system which works very well and outperforms many other 100w radios. It is also quite versatile because I can take the 1500 & amp (or just the 1500 if I wish) in the field with my 1.7ghz Itronix gobook laptop and it works well there too.
2  eHam Forums / Software Defined Radio / RE: To SDR or not! That is the question! on: December 31, 2012, 08:06:59 PM
Any rigs to stay away from? 

A easy question that has been answered with the reasons, thousands of times here. The answer you surely know if you have done any reading here whatsoever.  F L E X R A D I O

Now you will see interaction..  Cheesy  Cheesy  Cheesy

Stan K9IUQ


I honestly do not understand why people have problems with the Flex units. I use a Flex 1500 along with a homebrew 100w amp here and it was very easy to set up under Win XP Pro on a Dell GX520. And I come from an era when the Collins KWM-2 was top dog and the Heath HW-101 was for everyone else.

I also have non-SDR radios and they work great too. But the Flex blows them away in terms of RX versatility and performance. As has been pointed out many times, the interactive panadapter alone makes these rigs miles ahead of most because you can not only see the signals but you can tailor the filtering in real time and see the changes so you can quickly adjust for optimum reception of a given signal. I know of no other radio currently available which does this as easy as the Flex radios. And the interactive notch filters are simply incredible.

This is also the only radio I've seen so far which has so many transmit audio adjustments. With it, I can make my little Yaesu MH-31 hand mic sound just like the big boys of ESSB. And I have had a couple of high-quality ESSB systems before when it was popular.

After reading about many different experiences with the Flex units, some good and some bad, I'm thinking that Flex Radio isn't the problem. The real problem I think is that there is such a plethora of computer hardware and operating systems and technical savvy levels that almost every situation will be different so some will work as well as mine while others won't. But that certainly does not mean to avoid FlexRadio.

- Darrell/K7LZR
     
3  eHam Forums / Software Defined Radio / RE: Flex 1500 - Great radio for the money on: December 23, 2012, 12:45:10 AM
I run PSDR on a dedicated Dell GX520 3ghz single-core desktop under XP pro with no problems whatsoever, and can easily run other programs simultaneously with no ill effects at all. Seems that most of the problems I've seen with PSDR involve less reliable operating systems such as Vista, early Win 7, Windows under some version of Linux, etc. and/or other quirky setups.

I run portable on an old 1.7ghz machine with XP pro with similar results. Works fine. No dropouts anywhere. Don't know why so many people have trouble with this.
4  eHam Forums / Elmers / RE: R 2005D Motorola service monitor help on: November 28, 2012, 02:26:53 PM
Hope that's all it was. I used an R2014D for a long time, loved it. Now I use an HP 8924c, which is a very capable lab-quality instrument but must stay on the bench cuz it weighs 59 Lbs.!!!

- Darrell/K7LZR (formerly KA7BTV)
5  eHam Forums / QRP / RE: Is the KX3 all it's cracked up to be or fake? on: November 28, 2012, 02:09:02 PM
I dunno guys.....LA9XSA brings up some valid points but for my needs I just can't justify spending $1k+ for a tricked out KX3. BUT its very good that there are many who disagree with me else Elecraft wouldn't sell many of them Smiley.

- Darrell/K7LZR (formerly KA7BTV)
6  eHam Forums / QRP / RE: Is the KX3 all it's cracked up to be or fake? on: November 22, 2012, 04:32:50 PM
I have TWO FT-817nd rigs. Looked at the KX3 when it first appeared. Didn't even consider replacing the FT-817 with it.

I do a lot of hiking & mountain climbing. Usually its just alone or with a hiking partner. A primary consideration for me is to have as many ways as possible to get a signal out, especially in an emergency. I don't want to carry multiple radios or radio/transverter etc. to accomplish this so the FT-817 wins hands down. In my pack, I carry the FT-817, (2) 75ft. pieces of 20ga. wire, hand mic, small cw key, an Emtech ZM-2 tuner, a small dual-band VHF/UHF antenna, and (2) small 2500mah AA battery packs as well as loading the FT-817 internal battery bay. I have NEVER run out of battery power, even on extended/overnight hikes. And this  with many random QSOs and skeds on various bands/modes.

For me, its simple: with the FT-817 I can go from band-to-band, mode-to-mode, HF-to-VHF-to-UHF etc. without having to fish around for an HT (with its own power concerns) or fiddle with hooking up a transverter and doing the mental frequency display math to select frequencies.

This is especially important in an emergency because if I must get a call for help out then I can first try area repeaters (list is printed before leaving and carried with me), if no go then I can try FM simplex, if no go then I can try HF. All with THE SAME RADIO. Precious seconds saved by not messing with multiple boxes!

Emergencies aside, IMHO the FT-817 wins for other reasons also. It covers aircraft and FM broadcast. Not important for hiking/camping but FM broadcast is nice for a bit of entertainment. I also think that the FT-817 is more rugged than the KX3.

I should mention that I've also used my FT-817s as mobile and base stations on all bands/frequencies and they work very well for me. On HF at home I use a homebrew 100w amplifier and the setup works as well as nearly any other 100w HF radio. And having two FT-817s allows me to monitor and use both HF & VHF/UHF simultaneously. And having two of them makes satellite ops a snap if I ever want to do so.

I guess what I'm trying to say is that if you already have an FT-817, don't buy the KX3. Buy a 2nd FT-817 instead. You'll have a MUCH more versatile system!

    



7  eHam Forums / HomeBrew / RE: Farewell to Hethkit on: June 21, 2012, 11:21:29 AM
1) In some ways Heathshkit had the same marketing knack in the 60's and 70's as Volkswagen. They saw good sales figures working a niche market for the better part of two decades. Which means there is a buttload of old Heathshkit gear still circulating through the swaps waiting for the next generation of Hams eager to relive the alleged glory of owning a Benton Harbor green station.........

2) Unfortunately, that glory is more imagined than real as vintage Heathshkit gear now pushing 50 years old suffers from two areas of disappointment:
    a) It wasn't that good to begin with, and by modern standards you can do better for the same or less money.
    b) Most of it wasn't built to last and hasn't improved with age. So it ends up being turned at a future swap. Lather, rinse, repeat.

The attraction of Heathshkit was in the sales premise of owning quality gear on the cheap. Back in the days of point-to-point chassis wiring there was validity in the cost of labor as a significant part of the total, but unfortunately Heathshkit went beyond that level of cost-cutting by using some seriously cheap parts. You see it today in the phenolic rotary switches and tube sockets that are such a joy to replace. The avid kit builder wanted to believe then, as they do today, a first-time builder could do well enough to build a really cool radio while they were learning how to solder. Heathshkit did all they could to keep the design as cheap and simple as possible. You're thinking super-duper world class signal grabber, Heath is thinking idiot-proof econo box that works well enough to sell.

To use a car analogy, when you strip something down to the nitty gritty you get a Volkswagen Beetle. Not a Mercedes SLS...

http://www.roadandtrack.com/var/ezflow_site/storage_RT_NEW/storage/images/future-cars/sports-cars-of-the-future-2012-mercedes-benz-sls-amg-roadster/1779551-1-eng-US/sports-cars-of-the-future-2012-mercedes-benz-sls-amg-roadster.jpg

But, as an advertising copy writer would be quick to point out, the Beetle can do everything the red item from Stuttgart can do but at a fraction of the cost. Therefore they are comparable, perhaps almost identical. Anyone believe that? Anyone want to buy a bridge in New York?

So... What's my point? Heathshkit gear has been a cult item for better than 20 years. It's rare to see more than a day or two go by without a new thread started here by someone struggling to fix the rig they bought a year or more ago that has never and may never work as expected, but they still want to believe that someday it will happen. And if they can't fix it, maybe the next owner will and that's why I say there are two primary reasons you'll see Heathshkit gear at almost every swapmeet:

* There was plenty of it sold back in the day and much of it is still around because.............
* The true believers are loathe to throw it out or admit that maybe the Benton Harbor reputation isn't all that it's cracked up to be.


While all of this may be true, that's not it. Its the magic!.....The feeling!.....The americana!. Sometimes it isn't good to analyze everything. I've had many rigs from Hallicrafters, Heath, Eico, KnightKit, etc. which were just plain crap. But THEY WERE FUN! Especially when I and my ham buddies were young and didn't know any better. That's the magic of it. Little or none of that today.....
8  eHam Forums / SWL (Shortwave Listening) / RE: which receiver do you use ? on: June 06, 2012, 12:13:45 AM
FlexRadio Flex 1500, Icom IC-7200, Yaesu FT-817ND, and a few older tube receivers. For SWL, I find that the Flex 1500 is simply incredible because you can see as well as hear the signals, and the filter adjustments are virtually unlimited. And you can see and adjust the filter effects in real time. I have had SSB stations as close together as 2khz with a desired signal between them and I can adjust the Flex to dig it out. For AM listening, I have found nothing better. With the filter widened to about 10khz on an uncrowded band, the Flex sounds as good or better than the old Hallicrafters SX-28A which I had for many years. 

A close second is the IC-7200 which also has a superb receiver with awesome digital filtering.

And the little FT-817nd is a decent performer for SWL use too, especially if you couple it to a good outboard AF DSP filter such as the Timewave DSP-9.

- Darrell/KA7BTV
9  eHam Forums / Mods And Repairs / RE: What spares would you stash back for an FT-817ND? on: May 29, 2012, 01:36:07 AM
My approach was just to buy two FT-817nd rigs. But I also had a more practical reason - one is used on HF while the other stays on VHF/UHF. Works really well and gives redundancy......
10  eHam Forums / Mobile Ham / RE: FT-817ND - Production restart status - Post your rumor info here on: May 29, 2012, 01:26:21 AM
Jack, congrats on both your license upgrade and your new FT-817 Smiley. I've been using an FT-817nd for many years now and just can't imagine ham radio without one. The little rig has been used at home, mobile, on hikes, SOTA activations, and has even been across the USA and back with me on a recent 7000mi. trip where it operated from several motel rooms.

Looks like you've had yours for about 10 days now so I'm pretty sure that you've seen that it was worth the wait. Again, congrats!

- Darrell/KA7BTV
11  eHam Forums / Repeaters / RE: 2M repeater tuned cavitys or 2 antennas on: March 19, 2012, 10:16:50 PM

FM rpts were on the cutting edge back in those days. Today any fool with deep pockets can
pay the money and go plug and play. The magic is long gone, as are many of the pioneers who
are now silent keys.

Pete

So true I'm afraid Sad
12  eHam Forums / QRP / RE: Rumor about FT-817, on the Yahoo GP on: March 18, 2012, 02:51:27 PM
I ordered a new FT-817ND in December. I've bought/sold/traded six of these little radios over the last few years, and keep coming back to them because of sheer versatility. I've used FT-817s at the home QTH, on long-range hikes, as mobile rigs, and everything in between. I've done many SOTA activations with them.

Say what you will about the supposed shortcomings of these radios, but it really is just a matter of personal preference. At present, I do not see any other radio which offers as much in terms of frequency coverage, modes, ruggedness, and generally good performance for the size.

Take your time and do it right Yaesu. I'm willing to wait.
     
13  eHam Forums / QRP / RE: RM Italy amps with 817 on: December 06, 2011, 12:05:47 PM
Old topic but here goes.....

I use an FT-817nd with a homebrew 100 watt amplifier. This amplifier uses a pair of Motorola MRF-450 bipolar transistors and the design is pretty much right out of the 1981? ARRL handbook.

I've only built one low-pass filter so far (for 80/75m) and will add more in the future. I use this combo every night on 75m for ragchewing.

This amplifier is very clean as measured on the spectrum analyzer of a Motorola R2014D service monitor and gives me a solid 90-100w PEP with 5 watts of drive from the FT-817. There are no IMD nor ALC overshoot issues from the FT-817 as one poster had mentioned.

In practice, this system works just as well as any other 100w radio and better than some. I have a great amount of flexibility because I can separate the FT-817 from the amplifier for backpacking.

There are many valid reasons to prefer the FT-817/amp combo vs. the FT-857 or other 100w radio, such as the above mentioned backpacking & truly portable versatility.

There are also several commercial amplifiers which will be clean and work well with your FT-817. The THP models and the HF Packer amplifiers come to mind, and there is a new manufacturer whom is selling a well designed model on eBay.

So despite what others may tell you, it is indeed possible to put together a very nice system with the FT-817. Good luck!
14  eHam Forums / APRS / RE: Android and TM-D700 on: September 26, 2011, 11:14:08 AM
Yeah, $4.29 certainly isn't unreasonable.
15  eHam Forums / QRP / RE: Replacement for Icom 703 Plus ? on: September 23, 2011, 04:29:39 PM
The amplifier is a homebrew unit using a pair of Motorola MRF-450 bipolar transistors. Presently it only works on 80/75m because I only have one low pass filter built. 5w drive gives me around 80-100w out.

DSP is either a Timewave DSP-9 or computer DSP using various software, mostly AR5. Both seem to work pretty good. Lately I've been using the computer more.....

- Darrell/KA7BTV

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