the QCX is a direct conversion radio, this means that the LO is always within an audio frequency of the received signal. Say you are receiving an 800hz cw signal, on the 14.100Mhz LO is 800hz away fro

#20m #qcx #tcxo #alignment #problem

I come out of the vacuum tube era where we attempted to tame down VFOs with positive and negative temperature sensitive capacitors. Also, in the era where crystals were in a temperature controlled ove

#tcxo

I installed an AGC in my Rev 2 40m QCX mini last night and had the same short causing dit transmission. In my case it was a short between LCD_D6 and the plated screw hole. I also noticed that in Rev 1

#qcxmini #mods #tcxo #troubleshooting #agc

Al, OK, I guess I was thinking you would use it like I have on a radio that does not have easy compensation. I calibrate my QDX and other radios by just using one known reference. Comments I've seen h

#wspr #qdx #tcxo

I just installed the TCXO module into the Classic QCX. A write up is attached. 73, Jim AJ8S

#qcx #tcxo

👍

#u3s #tcxo

Here's my attempt! Works superb. I think Hans should sell these tcxos ready strapped to the synth board. The board on the right of the pic is the, 27mhz standard.

#tcxo

I use an SDRPlay with a laptop as a spectrum analyzer. It has excellent dynamic range and covers up to 2 GHz. I also purchased three BNC attenuators from Amazon which give me 10, 20, and 30 db of atte

#qcx #tcxo