Originally Posted by AC5CH
Has anyone here ever successfully modified a CB
to operate on 75 meters? It seems that this would be a good project for those who want to run decent AM
on that band. In particular, I'm interested in converting a Cobra 29. I've got both versions - PLL and crystal-plexer...
When I was a kid, I remember reading an article where a HAM converted a couple of 3-channel Realistic mobiles to operate on 160 meters AM
. However, I've never heard of it being done since then.
***I've got several Johnson Viking II transmitters that work, so I'm interested in doing this mainly out of curiousity and in the spirit of experimentation.***
Thanks in advance for all comments!
Yes, I would like to share some experiences with CB
modifications. The Philippines has over 7000 scattered islands and the communication infrastructure was not good in the late 70's. So HF
radio's was kinda expensive that time. I was a frustrated HAM since I cannot afford to buy so modification using the poor mans (CB
) radio was my last option.
I did lots of experimenting with CB
radios on both AM
. Tried as low as 80 up to 6 meters and authored 2 books that was never published.
Modified over a hundred CB SSB
radios for 40 meters in the mid 80's using direct conversion and did not used any HF
transverter since signal to noise is not good.
I can make a 7.8 Mhz intermediate frequency SSB CB
radio operate on 40 meters and have a good noise level at night using crystal in the broad band front end that serves as a sharp 30 db rejection filter.
MABUHAY from the Philippines