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The Motorola CM550/555 uses the TC9105P pll chip, which can be modded for uppers. See the link from Sonoma above. (Secret CB Vol. 12, page 7.) FYI, the last two Sam's manuals in the cb radio series (#s 292 & 293) weren't called CB Photofacts, but rather were called Sam's CB Radio Service Data.
Motorola jumped into the CB market about the time it was collapsing under the weight of 17 new channels. Some time around 1977, if memory serves. Motorola never made a 23-channel CB that I'm aware. And the first five years of 40-channel radio sales was handicapped by zillions of 23-channel radios being sold for pennies on the dollar.
If you figure out how to do this, let me know. Motorola seems to have put a little effort into making their mics incompatible with other equipment. There are three problems with getting this to work on another radio. The mic is powered by the radio. To complicated issues, this power is the current flowing through the closed TX connections.
Motorola CM-540 CB Radio. Thread starter bigal46563; Start date Feb 6, 2012; B. bigal46563 Member. Jul 1 ...
The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
Uniden's HR2510 & HR2600 10 Meter Amateur radio's are nice for single band operation. CREDITS: M.T. Stacey KC4HGH in Septembers issue of 73 Amateur Radio (1989) Published his findings on power modifications to the HR2510. The modifications that follow are based on his works with some additions: INTRO:
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This radio has me stumped, and every Motorola CB555 I've seen. The radio will give a good carrier on AM and mod on SSB for maybe 10 min, then the RF fades away to nothing. Turn off the radio for 20 mins and it will work for 2-3 mins. This says its heat or cold solder joints.
The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.