开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
  1. Softrock40
  2. Messages
Single Messages Topics Expanded Polls

(No subject)

 

Hi Tony,

Many thanks for the SoftRock kit. I have one from Round 3, and it has been working perfectly from the day I assembled it. Your comments on the crystal frequencies are appreciated. I will report my progress with the 8830KHz mod in this group, but this may take a while since I am still having fun with the unmodified version of the receiver.

73 Alex VE3NEA

Hi Alex,

Your 35.304 MHz crystal sounds just right to me. It will probably oscillate
at around 35.4 MHz in the SoftRock40 oscillator circuit. This would divide
down to 8.85 MHz and the SoftRock would then cover from 8.826 to 8.874 MHz.
This would give you IF passband tuning at your IF frequency -4 kHz to +44
kHz, more than required I would think.

The 35.208 MHz crystal would be a little low in frequency for this
application.

One ham has reported great results using the SoftRock40 with his vintage
Colins RX with a 455 kHz IF. Please let us all know how it works for you.

73,
Tony KB9YIG
Join [email protected] to automatically receive all group messages.