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eHam Forums => QRP => Topic started by: 2M0YCG on June 18, 2011, 10:54:20 AM



Title: QRP Distance Records ??
Post by: 2M0YCG on June 18, 2011, 10:54:20 AM
Hi all, Does anyone in the forum know where or if there are any QRP distance records and what they are ? As i have recently made a QRP - (5 Watt) contact with Ian VK3MO via Long Path - A total distance of 23103.7 Kilometres. I'm just trying to find other distance records. As i have recorded my QSO and added it to YouTube you can view it here at the following link below....
http://www.youtube.com/watch?v=yE_JMPwiFQ4

I was using my Yaesu FT-817 and a Cobwebb Antenna @ about 25 Foot AGL.
 


Title: RE: QRP Distance Records ??
Post by: AE4RV on June 18, 2011, 01:07:44 PM
It's going to be tough to beat the Pioneer and Voyager space probes!


Title: RE: QRP Distance Records ??
Post by: K0OD on June 18, 2011, 02:14:45 PM
I remember a cover story in Popular Electronics in the late 1950s where Bill Orr, W6SAI worked WAC with 96 milliwatts.  No doubt it's been done with far less power many times since.

CQWW CW QRP all-bands record was set in 1999 from Aruba:
P40W (W2GD)   Score 5,024,800   QSOs 3,277    Zones 137   Countries 413 (note that those are the total on all bands).

Single band record  (10 meters in 2001)
Station:6Y1A (K2KW)   score 742,154   QSOs: 2,508   Zones: 30   Countries: 97

Single band QRP record for 160 meters: C6ARR  17 zones and 65 countries!!!!

Single band QRP DXCC has been done several times on SSB during a CQWW weekend.  


---------
Don't know what the distance record is but QRP is a snap... from the Caribbean... in a major contest... on CW....with big antennas...at the peak of a great sunspot cycle.


Title: RE: QRP Distance Records ??
Post by: WB6BYU on June 18, 2011, 04:47:29 PM
I think the current ham QRP distance record is about 478,000 miles.


Title: RE: QRP Distance Records ??
Post by: ZENKI on June 20, 2011, 02:44:28 AM
Ian VK3MO uses  4 X 5 element  stacked yagis on a 200 ft tower. I have heard  him testing his system working  Europeans on 100 milliwatts both ways. I doubt very much if you have a record.  I have worked VK with my HFmanpack and its 9ft whip running 20 watts. I have had numerous contacts with VK running 1 watt. When I was holiday in the Pacific i worked 9A9A(a big big big gun) with a Miracle whip and 5 watts with a battery powered K2.  The only people who keep records of these events is the HFPACK group.

If you worked a average ham station with 5 watts I would have more envy, working someone with a 200 ft tower with antennas that have 20 decibels of gain hardly ranks as a QRP achievement. But its  nice that you had the QSO.

Hi all, Does anyone in the forum know where or if there are any QRP distance records and what they are ? As i have recently made a QRP - (5 Watt) contact with Ian VK3MO via Long Path - A total distance of 23103.7 Kilometres. I'm just trying to find other distance records. As i have recorded my QSO and added it to YouTube you can view it here at the following link below....
http://www.youtube.com/watch?v=yE_JMPwiFQ4

I was using my Yaesu FT-817 and a Cobwebb Antenna @ about 25 Foot AGL.
 


Title: RE: QRP Distance Records ??
Post by: 2M0YCG on June 20, 2011, 04:16:24 AM
Thanks all for you're replys  :)


Title: RE: QRP Distance Records ??
Post by: K0OD on June 20, 2011, 09:48:47 AM
Back when 10 was really hot I worked a central African station who was using one of those HF handhelds with a small whip on top. I think his power was less than a watt. I could barely hear him; he said I was way over S-9 with my KW and yagi.

I note in your youtube video that the VK has trouble getting your call for the "Q-R-P" you keep repeating. I hear that all the time on the air. Junk like "this is K0RPQ slant QRP"... I repeat...

I work some QRP but sometimes I feel guilty when I make the other guy do a ton of work to pull out my signal.



Title: RE: QRP Distance Records ??
Post by: N3OX on June 20, 2011, 10:44:26 AM
I work some QRP but sometimes I feel guilty when I make the other guy do a ton of work to pull out my signal.

Don't discount the possibility that the other guy will get a real kick out of pulling out your signal.... especially on the low bands where people take pride in building up their weak signal reception especially.

One of my most memorable contacts was copying G3ROO on 80m CW when he was running some old WWII transmitter that put out 3W or so.   G3ROO has pretty good antennas, but still, I was happy to be able to hear a few watts out of England. 

I think if I took the time to build a big array of antennas that could hear a 5W and hamstick station nearly anywhere on the globe, and I only ever got called by kilowatt+tribander stations with 40dB signal to noise ratio, I'd get bored and wish I hadn't spent so much time and money on antennas.


Title: RE: QRP Distance Records ??
Post by: WB6RQN on June 20, 2011, 03:45:26 PM
And there is a lot to be gained by using a mode that uses your meagre power more effectively, e.g. Olivia, Contestia, THOR, DominoEX/FEC, etc. If I can hear them clearly I can usually work them at the 5W level.

73 de Brian, WB6RQN/J79BPL




Title: RE: QRP Distance Records ??
Post by: W8JX on June 20, 2011, 06:00:18 PM
And there is a lot to be gained by using a mode that uses your meagre power more effectively, e.g. Olivia, Contestia, THOR, DominoEX/FEC, etc. If I can hear them clearly I can usually work them at the 5W level.

In past I have worked MFSK stations with solid copys when I could not really hear them well with my ears.  Same with Pactor.


Title: RE: QRP Distance Records ??
Post by: AD4U on June 22, 2011, 08:56:34 AM
I have worked Brisbane Australia from South Carolina with 1 watt from a home brew transmitter powered by flashlight batteries.  This is about 12,000 miles.  My signal report was 579.  This is far from a record.  Many have done it will less power.

Dick  AD4U


Title: RE: QRP Distance Records ??
Post by: WB4TJH on July 01, 2011, 06:30:35 AM
Go to QRP International's web site and see what they say. The distance factor alone is not the only factor that counts, but the miles per watt. QRPI has been the primary international qrp organization for over 50 years.


Title: RE: QRP Distance Records ??
Post by: KC9TNH on July 05, 2011, 12:04:44 PM
I have worked Brisbane Australia from South Carolina with 1 watt from a home brew transmitter powered by flashlight batteries.  This is about 12,000 miles.  My signal report was 579.  This is far from a record.  Many have done it will less power.

Dick  AD4U
Dick, that's a neat story, thanks. I don't 'chase' QRP stuff but as a relatively new op have had a couple memorable ones with my FT817. One was my first QSO, WI to Pensacola CW before I understood the power icons on the radio and didn't realize I'd been running the first month on 2.5w thru the speaker wire into the front maple tree. The other was an early morn CW on 30m and although he was much faster than I, he had pretty code & spacing so I pulled out his call pretty easily. ("we're not in Kansas anymore...why isn't there a pileup?") I called him back, he graciously cut his speed in half & we exchanged good signal reports & QTH - he was from the Seychelles. That's when I realized I'd forgotten to punch the <on> button for the 817's companion THP amp, 45w that weren't needed after all at that particular moment in time.

Not anything like records, but very satisfying from a little radio and a home constructed OCFD. I've also had 600w stations fade on me with the breeze, so the coin flips both ways. I try to remember the something special about the contact rather than just the numbers.  As you point out, serious QRP'ers have demonstrated some amazing things, yourself included. At this point in my ham career if I hit Brisbane with anything I'd think that pretty special.

What I really like is being able to reliably hit the buddy 80 miles away if needed QRP w/battery 'cause the gent in the Indian Ocean won't come help me in the event of a disaster, the neighbor will. And as K0OD points out, remembering my own "days before wattage" I'll sometimes cruise a QRP freq for someone pounding brass hoping someone will bother to answer them. Heck, answering the big signals is easy.

 :)


Title: RE: QRP Distance Records ??
Post by: W2UIS on July 15, 2011, 08:46:25 AM
I use Hamsticks configured as dipoles on a small tripod. I have sets for 80, 40, 20, 10. My rig is a Icom 703. The setup works very well as a portable station.


Title: RE: QRP Distance Records ??
Post by: NU4B on July 15, 2011, 04:36:15 PM
Back when 10 was really hot I worked a central African station who was using one of those HF handhelds with a small whip on top. I think his power was less than a watt. I could barely hear him; he said I was way over S-9 with my KW and yagi.

I note in your youtube video that the VK has trouble getting your call for the "Q-R-P" you keep repeating. I hear that all the time on the air. Junk like "this is K0RPQ slant QRP"... I repeat...

I work some QRP but sometimes I feel guilty when I make the other guy do a ton of work to pull out my signal.



I agree with Dan, N3OX. Don't feel guilty at all. Almost all amateur ops would go through a little more work to give a QRPer a QSO. (Maybe there are a few that are so wrapped in themselves they forget the comradary.) I get QSLs all the time noting my power and nice comments from the other op. (I don't do the "/QRP" thing except maybe in a QRP contest or trying to raise another QRPer on the QRP freqs.) But for DXing ans regular contesting I don't mention. Too time consuming and too confusing especially ifthe other guy runs a high rate. Just send your call, get in, and get out. Then send a QSL card with the revelent info and I bet you will see your fair share of compliments about you're station.

The bonus for the receiving station is that he has a neat station with the ears to pick up QRP stations. And the practice he gets listening to low power stations will be useful at some point because somewhere down the road a rare station will come on the air and they won't be S9+10 all the time.

After all these years I still haven't got over the shock of radiatimg a 5 watt (or less) signal from my antenna and have it travel around the world to some strange land. Ham radio is great!


Title: RE: QRP Distance Records ??
Post by: AB7KT on July 16, 2011, 05:19:03 AM
I agree that it is a mistake to tell the other operator that you are QRP unless he specifically asks about your station.
I can't tell you the number of times I have done this and AS SOON as I tell them how much power I am running, it ends the QSO. We can go back and forth 2-3 times, then I mention that I am QRP and pretty much every time the other op suddenly has trouble hearing me/QSB is getting bad.............73
This has happened to me so many times that you would think I would learn but I just did it again within the last couple days when I finished building my Small Wonder Labs Retro 75. This is as predictable as the sun coming up every morning in the East and setting in the West.

On the other hand, I have also done the opposite: many times. I simply did not mention that I was QRP and just continued on with the contact like there was nothing out of the ordinary.

Funny, I have also worked someone and never mentioned that I had been QRP. Then, after the QSO was over, communicated wtih the other op over the internet and as soon as I mentioned that I had been QRP he started telling me how I started to fade out at the end or something.


Title: RE: QRP Distance Records ??
Post by: K4OCE on October 26, 2014, 04:54:47 PM
I worked ZL2AFZ from North Carolina with 3 milliwatts

Had a 4 element Cubical Quad


Title: RE: QRP Distance Records ??
Post by: NU4B on October 30, 2014, 02:45:16 AM
I worked ZL2AFZ from North Carolina with 3 milliwatts

Had a 4 element Cubical Quad

WOW! I don't care how many element quad, that's amazing.


Title: RE: QRP Distance Records ??
Post by: MEKONGRF on October 30, 2014, 03:14:49 AM
I worked ZL2AFZ from North Carolina with 3 milliwatts

Had a 4 element Cubical Quad

Impressive. How do you measure 3 mW power? A mW RF Power Meter?

If I am not wrong - with 12 V output that is a current of 0.00025 A, or 0.25 mA. To measure such a small current - what meter would you use and how do one get a reliable reading?  :-\


Title: RE: QRP Distance Records ??
Post by: WA2TPU on November 02, 2014, 12:00:41 PM
and here's my 3 cents worth.....
ANTENNAS ANTENNAS ANTENNAS!!!
Distance worked is relative to band conditions and the antennas you are able to use...I have a weekend sked on 20 meters with my old friend ZS1RJQ and ZS1PZ...Again....ANTENNAS ANTENNAS ANTENNAS....Put up the BEST ones you can...to me...its that simple. If you'd like listen to this quick recording by ZS1RJQ today during our last sked Qso. I peaked at an S7.AND NO!! I'm NOT BRAGGING....JUST SHARING.

https://www.youtube.com/watch?v=Yc-NFiLb2s0&feature=youtu.be

Best regards with many 72...73 to all. Have some FUN WITH Qrping
Don sr. -- WA2TPU/Qrp --


MICHAEL CORKE
To
me peter personal PJ ZS1PA
Today at 1:20 AM
https://www.youtube.com/watch?v=Yc-NFiLb2s0&feature=youtu.be



Title: RE: QRP Distance Records ??
Post by: K8AXW on November 02, 2014, 05:02:37 PM
Quote
I can't tell you the number of times I have done this and AS SOON as I tell them how much power I am running, it ends the QSO. We can go back and forth 2-3 times, then I mention that I am QRP and pretty much every time the other op suddenly has trouble hearing me/QSB is getting bad.............73
This has happened to me so many times that you would think I would learn but I just did it again within the last couple days when I finished building my Small Wonder Labs Retro 75. This is as predictable as the sun coming up every morning in the East and setting in the West.

If I was to hazard a reason for this I'd say that the other operator was putting all of his operating skills into play to complete the QSO.  Then you inform him you're running QRP and he thinks, "Here I am working my ass off trying to copy this guy and he's running low power!  To hell with this!!

Most QRO stations get on the air for an enjoyable and leisurely contact.  They have no interest in your QRP endeavors.  However, being a good or experienced operator he will put forth an effort to make a QSO successful. 

Then he's blindsided by this "QRP thing" and feels that you are not essentially holding up your end for a contact.

Just a WAG!


Title: RE: QRP Distance Records ??
Post by: W1JKA on November 03, 2014, 02:45:56 AM
Re: AB7KT

  Don't give such contacts a second thought, any such Amateur in the HOBBY that considers leisure a priority and everything else as working his ass off would be much happier taking up golf.


Title: RE: QRP Distance Records ??
Post by: K0OD on November 03, 2014, 04:22:20 AM
I worked ZL2AFZ from North Carolina with 3 milliwatts

Had a 4 element Cubical Quad

WOW! I don't care how many element quad, that's amazing.

3 milliwatts for that distance is amazing. Bluetooth, which is often used to connect computers with peripherals in the same room, uses 1 milliwatt in the 2.4 GHz band to limit its range to about 32 feet. Don't garage door openers use about 100 mw?


Title: RE: QRP Distance Records ??
Post by: K0OD on November 03, 2014, 09:51:23 AM
I worked ZL2AFZ from North Carolina with 3 milliwatts

Had a 4 element Cubical Quad

Impressive. How do you measure 3 mW power? A mW RF Power Meter?

If I am not wrong - with 12 V output that is a current of 0.00025 A, or 0.25 mA. To measure such a small current - what meter would you use and how do one get a reliable reading?  :-\


The Oak Hills WM2 QRP wattmeter should enable a ballpark guess down to the 3 mW power level:

http://www.qsl.net/n7kzz/wm2.html

(http://www.qsl.net/n7kzz/wm2fps.jpg)


Title: RE: QRP Distance Records ??
Post by: MEKONGRF on November 03, 2014, 12:12:49 PM
To K0OD.

Thank you very much for presenting the WM-2. To be honest I did not know that there were mW meters around for hobby use. After seeing your web site with the guts of the meter, I will build one for my experiments (I am not a licensed ham, but as an RF tinkerer I do temporary test beacons in the order of 100 mW for testing antennas and receivers that I build).

One more box in my 'lab'. Thanks again  :D

Roy


Title: RE: QRP Distance Records ??
Post by: K0OD on November 03, 2014, 01:11:50 PM
Hi MekongRF:  ["on the border of Laos and Thailand, and 40 meter seems dead here"]

The Oak Hills kit is pretty expensive even in the U.S. because it commands a premium price for the kit building experience. The WM2 is attractive with a nice big meter. Its performance is well regarded. Used units are rare and sell quickly for almost as much as the new kits. I've seen other QRPp watt meters on the web that will go down to 100 mW. MFJ has one that's pretty cheap. 

You would be a VERY popular new ham during the upcoming CQWW DX contest on November 29-30. The rules strongly favor your location in rare zone 26. The contact exchange is very simple and repetitive; a great time to work on Morse skills. (although most hams will be going over 30 wpm). The most powerful ham stations in the world will be on the air. 40 is my favorite contest band and it is always packed with stations the entire 48 hours during the CQWW. You will hear many stations from Japan... also Russia, China, the Pacific and, probably, the US and Europe.  See http://www.cqww.com/

I'm planning to enter the November CW CQWW using only 100 mW into a 1/4 wave ground mounted vertical. You won't be hearing my tiny signal LOL!. I'm just hoping to work a few stations in western Europe. Good luck.



Title: RE: QRP Distance Records ??
Post by: MEKONGRF on November 03, 2014, 02:13:36 PM
K0OD

I found http://www.dl2lto.de/sc/HB_WM-2.htm (http://www.dl2lto.de/sc/HB_WM-2.htm), so I will make the meter from scratch (I have som big old VU meters that need a new scale). I have a lot of old precision HP instruments that I can set up for a one time calibration at around 1 MHz.

Well, I might get licensed one day. But I am lazy and always hunting for the new, so I would be bored doing thousands of QSOs. When I have a fully working PC-Arduino-K2 (RX/TX guts only - homebrew - I just bought the PCB from Elecraft and will populate only the RF parts and interface to Arduino), I might set up a licensed [keyboard / decoder / LoTW] station. Maybe ...

Best of luck for your contest.