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I tried a pulse-stretcher using a 555 [found on the net, not my design] with both a Trimble unit and a Sure development board. Neither of them had any success ;-( OTOH, the 555 isn't the best chip to

It's worked 100% on ALL versions, including all versions so far on the U1 and the U2. It just works.... 73 de Andy

Hi Eddie, Andy Thanks for the thoughts on this. This is the next challenge - to make the GPS Interface work with both very short, and very long pulses. I don't know if I mentioned it before, But I

Hi Eddie No, I didn't put it into the spare bytes! I removed the Hell modes from v2.02k to make space. Hell takes a lot of space in the memory because it's a huge look-up table for all the character

Andy Did the Rayax work on v2.01 The 1pps pulse width does seem to be tied up with the claimed accuracy for for timing / frequency purposes. Hans obviously knows how to handle long and short

Thanks Eddie & Andy I'm all blushing now... 73 Hans andyfoad@...> wrote:

Yesterday I thought I'd try to do a bit of research regarding the GPS modules used by kit owners. Now I'm not sure if I've got all the model numbers correct but from what I've seen so far, all the

This is the upgrade I'm most excited about! Once the Martello Tower Group have received their 2.02k version, we will be installing it into G0PKT and running both WSPR and QRSS on 30m and setting up a

Seconded ! The improvements are OUTSTANDING. Hans has done absolutely brilliant work on this version, and it stands head and shoulder above anything I've seen so far. I've already ordered my bunch

Hi All I recommend v2.02a be rapidly installed in all v2.01 U2's. It really is good. The improvements in spectral purity are outstanding and some of the operating convenience improvements well worth

Hi Hans That's great, exactly what my PIC DDS MEPT does, shown on Knights Frequency Table as 8minutes QRSS, 2miinutes to commune with Satan. I knew you would manage to do something with those few

Hello I search a 50MHz LPF design seem than for U2 Maybe you have this Thanks by advance Sincerely Michel F5OZF

All An update on where I am with the next batch of U2 kits, which I had hoped to have ready near the start of June, but clearly that was over-optimistic. Firstly the PCB manufacturer claims a 1 week

All Following Andy's design (see pasted below), I have now added a 60m filter to the kit shop http://www.hanssummers.com/shop.html?page=shop.browse&category_id=6 73 Hans

Good morning all, This is all the fault of Keith Maton G6NHU, who asked for a special version. Then we thought others might like it too. So that became v2.02k. It is based on v2.02 but the

All Thanks for waiting patiently. The new v2.02a version is now officially released. Many thanks to Andy G0FTD, Eddie G3ZJO and Keith G6NHU who beta-tested the new version. The final version is

I don't think you should assume your receiver calibration is absolutely correct or that the sound card frequency display is spot on. This is what I do to set up a QRSS transmitter. I set Argo to

Argo v1 build 143 : I set the two left-hand boxes to 1000 and the right-hand to 10138700. This allows QRSS and WSPR to run simultaneously. Obviously you need a filter bandwidth of at least 1.3 kHz

I set my receiver to 10.139000 USB Also set Argo to 10139000 Setup/calibration This takes care of the offset and you get a proper read out in the LHS Hope that helps Philip G4JVF

Hi Gang Just built my 3rd QRSS beacon - this time it's the Hans Arduino shield. Mighty fine piece of kit too! I've managed to completely confuse myself with the setup of Argo and hence the frequency