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CB radio conversion to 75 Meters - Anyone ever done it?

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  #9  
Old 07-27-2008, 03:41 AM
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Thanks Bit Pit!

I really appreciate your letting me know where to get the 80-11 meter transverter boards. I figured that I wasn't the only person to have thought of such a project, and I was correct!

You know, I might even rig one up to work with with my Uniden Grant LT. That would certainly be a QSO starter! Mount it all in an Igloo cooler, and it would make a great portable setup.

Thanks again, sir!

R sc 06111951 $ 20.00 2582A 8Om<>11m Transverter. PA1 1995Dec
R sc 06111952 $ 31.50 2582B 8Om<>11m Transverter. Mix 1995Dec
R sc 06111953 $ 26.50 2582C 8Om<>11m Transverter. PLL 1995Dec

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  #10  
Old 07-30-2008, 03:55 PM
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OK, remember these boards are just blank PCB ! You need all the components and schematics etc. to complete.
If you decide to go this path let me know if I can be of any assistance, sometimes easier to source stuff in the originating country.

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  #11  
Old 07-31-2008, 04:30 AM
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Hi Bit Pit,

No problem - I'm happy to just find some pre-made PC boards! I'll definitely keep you in mind when I get the boards in.

I built a super efficient refrigerator out of a chest freezer based on some
plans and a thermostat kit I bought from a fellow who lives in your country. He ended up supplying me with the "extra" parts needed to complete the kit that were readily available in Australia but not readily available here. So, I definitely will take you up on your offer for assistance in the future! Also, if I can help you with finding anything here in the states, please let me know.

Thanks,

Steve

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  #12  
Old 08-02-2008, 12:26 AM
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Thanks Steve! if I were to start a list of goodies that you can easily get in the states,that I'd love to get my hands on...I'd be typing for weeks !

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Old 08-03-2008, 02:23 AM
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Hahaha!

I know what you mean!

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  #14  
Old 10-30-2008, 07:34 AM
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Default CB to HF modifications in the Philippines

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Originally Posted by AC5CH View Post
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!

73

Steve

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 and SSB. 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

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