¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. DRAKE-RADIO
  2. Topics

Easy Drake Crystal Eliminator.

 

This is about the easiest way I can think of executing this. QRP Labs VFO/SG kit is about $35 and the case is about the same, plus shipping.
I spent 2 hours completing the kit and enclosure, easy to assemble. I set an offset of +5645 Khz? for the VFO and fed it into the INJ jack, it also has
16 memories. I am very pleased with the results. ( I built a Collins version as well.)
 

George,
If I read the info on the?QRP Labs vwebsite correctly, the VFO kit you have puts out a square wave signal. They show a kit?that puts out a sinewave, but it isn't available yet. I am curious if you have noticed any spurious issues with the new generator that might be related to the high harmonic content.
Bill N0CU


On Thu, Mar 7, 2024 at 12:27?PM George Rybicki <atomant@...> wrote:
This is about the easiest way I can think of executing this. QRP Labs VFO/SG kit is about $35 and the case is about the same, plus shipping.
I spent 2 hours completing the kit and enclosure, easy to assemble. I set an offset of +5645 Khz? for the VFO and fed it into the INJ jack, it also has
16 memories. I am very pleased with the results. ( I built a Collins version as well.)
 
Edited

Hi Bill & George

How about injecting the Crystal Eliminator signal via the "XTAL LOCK" socket? The Crystal Eliminator signal via the "XTAL LOCK" socket must be AC-coupled via a 1 nF capacitor - and the signal might need to be attenuated and terminated with 50 ohm?

If so, the square wave will be bandpass filtered and a fine sine wave will appear on V2 cathode. C59 might be disconnected, so V8 do not oscillate - maybe it is not necessary?

Schematic:
http://www.ve6kq.com/drake.html

--
best regards,

Glenn, OZ1HFT

1 - 3 of 3