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Out of interest, could one of these TX boards be used/modified for use as a WSPR transmitter? Regards Philip

Hi guys, First of all may i apologise to those of you who have found a couple of parts missing in recent kits. I have a very small brain and sometimes I loose count when I get distracted. If you do find a part missing please let me know and I'll ship you a replacement ASAP.? Secondly a couple of kits have gone missing in the post recently and one took some months to arrive instead of the normal 10 days to the land of the brave and the free, where nothing is heard but the sound of a bird and the sky is not cloudy all day etc. I'll be taking this up with the Post office guy when the Christmas rush is over. If you have a missing kit please contact me and I'll sort it out.? Lastly, I just got back from a trip to Budapest a day late and to the wrong airport. Continental Europe is snowed in most of the flights from Budapest to The Netherlands and Germany were cancelled so i was lucky to get home. The good news is that waiting for me were 100 PCBs and 200 T37/43s from Diz (AKA The Toroid King). So I will be packing another 100 kits over the next few days and re-stocking the shop. This will the last batch for the?foreseeable?future. Hans and I will be shutting the shop during February as we both have significant family/work commitments. Normal service will be resumed in March. A couple of people have asked us about other bands...20 meters, 10 meters and VLF. Neither Hans or I have the time to do any significant work on these at the moment. When we started the beacon kits we had hoped that people would use them as a starting point for their own?experimentation. If anyone fancies a go at 20/10 meters (or any other band) I am happy to donate some crystals and other parts on the promise that you write the results up and post them to the QRP Labs group. I don't have any crystals for VLF. Please contact Hans or I off list... Lastly, the RX kits are delayed for a few months...entirely due to lack of time and me starting a new career at short notice.. They will happen, apart from anything else we have most of the parts and the PCB's for the first run which is a significant investment.? 72/3 de Steve G0XAR -- It is vain to do with more that which can be done with less.

Hello A new QRSS receiver and new QRSS grabber are now on-line. Details of the receiver are available here ??? ??? and the grabber output is here ??? ??? With all the new QRP-Labs QRSS transmitters being activated, we need more QRSS receiver/grabber servers to monitor them.? This is my contribution toward that effort. Arv K7HKL _._

There has been a bit of chatter about 80 meters. So, I am tonight, I am on 3500.828 at 70 mW. Are there any 80 meter grabbers? What is the url? Ken Evans, W4DU QRP ARCI 696, GQRP 5918, FP 295, NOGA, ARRL Life

Hi Guys, The G0UPL beacon kits are available again. Please order them via the ?shop?on Hans's website. Please do not forget to tell us the callsign you want programmed into the keyer chip when you order.? 72/3 de Steve G0XAR -- It is vain to do with more that which can be done with less.

A friend, W3HZZ is now on 10.140.38 from Atlanta…..?? Please let us know if spotted

I finished the 80 meter beacon last weekend and had a few problems. I first destroyed a few 2N7000s by turning R8 fully counter clockwise instead of clockwise - read the directions!! Then I could not get the oscillator above 3500.540. I changed turns on L1 several times and finally ended shorting it but could not get above 3500.60. I then changed C9 from a 5 - 25 pf to a 3 to 16 pf. Now I can go up to 3500.860. I think the issue is a finicky xtal. Let me know when you "see me". I currently have my 70 mw beacon on 3500.850 (as close to mid band as I can adjust) Ken Evans, W4DU QRP ARCI 696, GQRP 5918, FP 295, NOGA, ARRL Life

Has anyone on either group spotted Phil, W3HZZ ?on 10140040?? Been on for 24 hours and no reports.? I have looked at a number of grabbers, but cannot see W3HZZ.? ? Thanks in advance, ? Ken W4DU

Anyone built the Pongrance 30meter beacon rec kit? see http://www.pongrance.com/gcrx-14100.html At $35 it looks like a bargan. Paul k5wms

..and have some questions: 1) Is there any particular reason why the 2N7000 was chosen over the VN10? The VN10 comes in a number of versions but the only significant difference I can see from the spec sheet is that it has a higher power rating than the 2N7000. Given that a number of constructors say their 2N7000 can get too hot (possibly to the point of self destruction?) the VN10 may at first sight seem a better choice. 2) If R8 can be adjusted to a point where the 2N7000 can self destruct, wouldn't a fixed 1k resistor at the top of R8 or a higher value of R6 stop that? Although I've looked in this group's archives, no one has admitting this has actually ever happened, but it does sound possible and is warned against in the instructions. 3) This is my first project which ventures into the area of amateur radio and computers combined. I was a bit confused by the instructions describing the links to set the speed. I have only just now looked more carefully and realised the pin numbers in the table refer to the pins on the IC. For the 'hard of thinking' like me I thought the labelling of the adjacent six holes had some relevance. 4) The keying of mine goes a bit strange occasionally. It seems there are others on this list who have reported the same problem. Presumably this did not appear on the prototypes otherwise the advice of earthing unused pins would have been given to start with, so what has changed? Does earthing the unused pins always provide the cure? Apart from some minor issues with the board, (I'll drill out the R8 holes to fit the component properly), it is a neat little kit. And a bargain - especially when development is taken into consideration! Many thanks to all concerned. Regards, Ian, G4JQT

I have put a 5.6pF miniature ceramic in series with the 1.5-5pF that I used for C9. This gives me a frequency swing of 405Hz between 3500.720KHz and 3501.125Khz which makes tuning to the desired frequency much smoother. The 5.6pF was soldered under the PCB after cutting the track between C9 and the junction of L1 and C3. Les

I built my first 30m beacon and it worked first time, but I have not been able to get the power out up to 100mW (20dBm). I only get about 54mW (17dBm) into a 50 ohm load. I measured this several ways and verified it. So I built my second kit and I get he very same results. I think this verifies that I didn't make an error on the first one. I have verified the output filter with ELSIE and it agrees very well. The apparent problem is excessive loss in the LP filter, but I don't think that that is the case. 73, Cash KD5SSJ

Guys I've just completed the 40m kit and it is operating properly except that I cannot adjust the frequency enough to bring it to the correct frequency. The closest I can get is 7000350. I've tried playing with the windings of L1, but have not had success there either. Has anyone any suggestions as to how many turns to add/remove from L1 to bring the frequency up enough to tune. Thanks Tim

My 10.140 kit has not been on the air much due to antenna work that needs to be done. Instead I made some spectrum measurements. Harmonic suppression seems really good. But there are some spurious about 50 to 60 dB down. Most likely caused by the internal clock of the micro. I plan to add some more decoupling an see if that might help. A screenshot is in my photo section. Joop - PE1CQP

Hi, I suspect a few of us are running these TXers off a 12/13.8 V PSU and regulating the PCB down to 5v. A week or so back I considered running just the PA off 12V. I think some have already tried running them off 9v. I dont know much of their success. These are just some notes from my work on a 40m version (1) Cut a track to seperate the 2N7000 supply leaving the 47nF joined (2) The FET output would match better via a 200 ohm transformer rather than a choke when running a 12.5v supply. I used a 6 turn bifilar choke using the existing FT37-43 on the drain of the 2N7000. (A 9 turn choke for 80m should be ok) The tap goes to the 1nF capacitor feeding the LPF. 6 turns is adequate as the inductive reactance,since it is about 10x the load value (3)An additional 47nF or 100nF needed for bypass on the 5v supply on the PCB as there was only one bypass capacitor fitted. My previous measurements on my 30m unit gave about 23mA for the other stages with ~ 60mA for the final FET stage for about 100mW output. With the mod's the unit gave (1) ~ 350 mW for 60 mA PA current (pushing the boundary a little) (2) ~ 280 mW for 50 mA PA current (3) ~ 100 mW for 23 mA PA current Total transmitter currents are about 23mA higher With the improved match and 12.5v, the PA efficiency is around 50% vs 33% for the 5v setup. So 350 mW o/p is possible but rather caning the 2N7000 since there is no heatsink (2N7000 device disappation max is 400 mW. At ~ 50mA final current it should be reliable I checked the CW keying, by disconnecting the bias pot from the 5V and got in excess of 35 dB backwave A little PCB/Vero/ratsnest for a 78L05 regulator and bypass capacitors is required for feeding the other stages from the 12v Very pleased with the improvement in power (about 5 dB or 3X).This should improve the QRSS signals from this part of the world. Another station is looking at using the changes in his 80m Hans Summers kit just received Kevin ZL1UJG

Hi, I completed a document about modifying the Hans Summers QRSS TX kit for 12V PA operation. http://www.knightsqrss.blogspot.com/ Thank you to Joachim PA1GSJ for hosting the document. Kevin ZL1UJG

Hi all, I was hoping someone could give me some advice on the setup for the 30m QRSS beacon kit. I have built the kit set it to 10.14050 MHz. I tuned for max signal on CW/USB using a Yaesu receiver, and I also tried tuning to 10.14050 using my IC7000 as a receiver and I get a series of straight lines using argo but no keying waveform. I can hear the keyer output from the chip working well using a bud earphone, however I cannot see it in argo. Things I have tried so far: - I have tried the Led both ways as the pcb overlay did not match the circuit diagram. - I have tried changing the gimmick capacitor height from approx 15mm all the way to nearly 50mm with loose and tight twisting. - I have added a 6V regulator to the board so the freq does not drift as much with voltage. - I have tried CW receiver settings with different filters and also USB, LSB, etc. but not luck I have not yet tried: - Earthing all unused jumper pins - Isolated audio input to my receiver as currently it works with WSPR What I would like to know is, - should the led light up with keying at all ? - is USB the correct receive mode ? Any advice on this would be appreciated I feel like there is something silly I am missing with this as The signal from this little baby is nice and strong, the sine wave is clean. I just want to get it keying on the air :) -Dan

Hi Guys, The shop is back open.....I have another batch of 100 beacon PCBs to kit. I'll be ordering more crystals and toroids... 72/3 de Steve G0XAR -- It is vain to do with more that which can be done with less.

Are you guys going to be at FDIM 2011 with a receiver kit? I want to be first in line to buy one :-) Mike WE0H

Hi all, Just to let you all know I have built my 30m QRSS beacon kit (Hans Summers Kit) and it should be on 10.140085 more or less. It's only on 100mw as far as I know and I'm inteested if anyone can RX me. I have put the TX directly at the feed point of a 1/2 wave 30m dipole in the loft and run the kit from a 5.2vdc PSU. 73 de Colin G1IVG (Market Harborough, Leicestershire, England) www.g1ivg.com http://homepage.ntlworld.com/joannalowe/wvars/qrss.htm