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I followed the instructions and made loops and still got it wrong! I noticed before I soldered it in place so it was easy to correct. We are really lucky you know because there are not many people

Hans, Yes, sorry. With a FOX 27MHz TCXO it does indeed settle closer, I'm not looking close enough but better than +/- 0.5Hz at 10MHz. 73 Alan G4ZFQ

Hans, The one thing I forgot is that I'm using a non-standard reference crystal. Not 27MHz but a 26MHz TCXO. So that might well invalidate my tests? I'l look for a synt with the standard crystal (it

Hi Hans, a ProgRock version, where the frequency has the highest presision when uset with the Olg1 gps would really make me happy. I have checket the ProgRock and the U3s, and both are not god for

Hi George Apologies for the delayed reply. 1) I am sure it is possible to retain the 200Hz bandwidth even if you lower the CW filter centre frequency. But I don't know what the component

I followed the instructions in the manual and got T1 installed correctly I think. That T1 .... be afraid, be VERY afraid! Get it right first time! Well as you all know I wanted to improve mine by

Bob, Hans, I just checked my ProgRock with a PPS, it was about 2Hz out at 9.996000MHz (The Russian RWM standard.) BUT that is not with a QLG1. Ah! just as well I waited for Hans, that was with

Hi Lou It is not T1-related. I think this is something else completely, and is related to the firmware. It was a short-cut I took, while under time-pressure getting it all ready in time for the YOTA

73 Hans, Well I found the instructions good along with the hand drawing, but, somehow I ended up winding the opposite direction or opposite way around, then when I tried to fit it to the board, I

Hi Juston How should the ProgRock "VFO" be adjusted, in that case? 73 Hans G0UPL http://qrp-labs.com

Hi John No. At 50MHz or 100MHz the parts-per-million is still the same, when divided down you end up with the same thing. The limitation is the even-integer mode of the Si5351A which is used in

/ //Bob, Hans & All .............. de John VK6JY Back to your design basics Hans, would the ProgRock be inherently more accurate in parts per million if operating at say 50MHz or 100 MHz and

Hi Ben, Lou, Dave Thanks for the kind comments and support <blush /> I do wonder though... about T1, did any of you try to follow the manual steps and think that they need to be changed or improved

you might use any mosfet, say even IRF510. Only issue is its placement and mounting. Of course you , if one hand, can use 2n7000 taking care of pinouts. All said, please remove the broken device,

available in VK from Element14 (Farnell) for about 15c.? Problem is, if you only order under $45 you get hit with $12 shipping glenn vk3pe

Possibly they aren’t readily available in VK, but if you have Amazon, they sell them for a very small price. One listing shows them at about $15 for 100 of them, and they are supposedly Fairchild

Hi Bob, all I see several people have answered this already. This is my take on it all... What type of precision are you looking for when you say "lab grade"? The ProgRock when it is properly set

Thank you Hans, I did indeed manage to find a shop selling them!

2N7000 has an opposite pinout to the BS170... so the transistors have to be inserted into the board with the flats "the other way" around. Also the 2N7000 does not have such a high dissipation rating

My antenna broke and high SWR caused my QCX to cook and smell and at least one BS170 is visibly blown. Seems cannot find these locally, is 2N7000 as good? What alternatives can be used that will not