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I just ordered ten boards from my new friends at allpcb. They must have a pretty good marketing budget to absorb all the DHL charges! I am building the colpitts circuit from K7QO's notebook manhattan

Sorry for the misleading model no.? It is the HP 5382A.? ?Thanks for comments and suggestions.

Hi Jim, well, I did build the CCO Chuck is showing on page 112 of his great QRP Lab Notebook V.6.31. This original G3UUR design is very stable with the second transistor as a buffer stage. By

Just did a quick search of the posts in the group, but did not find an answer...I'm wondering if anyone else has noted that v1.17 of the NC40A BOM has R6 listed in 2 places with different part

Thinking about this a bit more ... once C17 is properly set it may be that the setting of C34 is trivial (well more or less). Since the transmit sidetone is generated by listening to the transmitted

I already have a few breadboards designed. See http://www.fishpool.org.uk/protoboards.htm These are all for muppet style construction. They have the advantage that the pad spacing is correct for

Hi Doug --- The other two crystals both have trimmers associated with them. Should be able to adjust them a few hundred cycles. The real questions: Would we actually prefer X5 or X6 to be some amount

I ordered Chuck's boards for the Oscillato from Allpcb late Friday evening.? I checked their site this morning, Sunday morning,? and the boards have been fabricated and ready to ship.? They must

Would a Designer Dream Board #1 fit your needs?? Or maybe the set of a #1 and #2 board, depending on what your are trying to build. My DD Boards are larger than the magic 100mm X 100mm required by

Or is this more like what you are thinking of. Terry VK5TM

Have a look at the file Breadboard.pdf (page 5 of the list of files) and let me know if that is the sort of thing you are looking for. I can either make gerbers of them or modify them to suit what you

More great work going on out there. This time from DuWayne KV4QB. Because he had a DIL 4060 he modified my layout - still using Muppet construction. He also modified it to use a copper ground plane on

Would there be any benefit to adding a buffer amplifier between the oscillator and the counter? Thank you. Jim Pruitt WA7DUY

Howard, I have an HP 5384A counter with an external reference input, also. I bought a Thunderbolt GPS frequency standard with a 10 MHz output that I use as my external reference.? This gives a very

has anyone ever created gerber files for a breadboard type of PCB for use in a circuit with and without an IC in it? somewhat like the boards you used to be able to get at Radio Shack. these mini

better use Multilayer capacitors wiktyh leads. I also suggest for each crystal wait for 15 sec before recording its freqncy. Let it settle. You may try to avoid air thrust on the jig and crystal under

I ordered one thousand 4.096 MHz crystals from China Monday. They came last night at 9:00 PM. Tonight I decided to sit down and see how many matched sets of 4 within 10 Hz I could get from a bag of

Mike, While serving the Indian Telecom, there was a stage of clock synchronisation with atomic clok for older switches. I had to use HP equipment, a counter.?To be sure, first I had to cabilbrate the

What is going to be the stability of your 4.9512 clock you will be using as reference frequency? It better be really good. I'm guessing your counter may have a more stable reference frequency built in

I have an HP 3283a frequency counter that will allow a reference frequency to be supplied at its back panel.? If I choose to drive it with a 4.9152 MHz clock I can sample a DUT crystal and read the