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 multimode cb radios the older models

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rabbi
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Call Sign : m3kbd/2e0kbd/m0kbd
Posts : 54
Times Thanked : 0
Join date : 2019-07-04
QTH or Location : stockton on tees
Equipment Used : kenwood ts 2000x ascom 70mhz icom vlf/hf/uhf receivers multiband antennas
Age : 61

multimode cb radios the older models Empty
PostSubject: multimode cb radios the older models   multimode cb radios the older models Icon_minitimeWed Jan 27, 2021 2:56 pm

hi i am looking for information on converting older multimode cb rigs to use on 28 30 mhz  10 meter  band what whould you recomend thanks for looking stay safe do radio 73s paul m0kbd Cool
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spsct
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spsct

Call Sign : 26-CT-4062
Posts : 3
Times Thanked : 0
Join date : 2021-04-12
QTH or Location : Christchurch
Equipment Used : Tristar 747 modded

multimode cb radios the older models Empty
PostSubject: Re: multimode cb radios the older models   multimode cb radios the older models Icon_minitimeWed Apr 14, 2021 10:44 am

rabbi wrote:
hi i am looking for information on converting older multimode cb rigs to use on 28 30 mhz  10 meter  band what whould you recomend thanks for looking stay safe do radio 73s paul m0kbd Cool

I have started this on my ~40 year old Tristar 747.

Rather than get really invasive, I have programmed a little Arduino/si5375 box that sits on top and replace the PA socket with sma to feed the output of that box to replace the "LO" cristal on the crystal PCB.   I thought about taking a feed from the LSB line ( 3kHZ offset ) but just have a "mode" indicator on the external box.   

This potentially gives me 26-30 depending on tunning / lock range. 

Is it worth it? - probably not but its great fun :-)

Dire warnings about some about phase noise if not using integers on the si board seem overblown.
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PostSubject: Re: multimode cb radios the older models   multimode cb radios the older models Icon_minitime

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