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Welcome, radio hobbyists! Since 1976 we’ve been the leader in CB Radio books, plans, kits, modifications, & technical information. We specialize in unique, hard-to-find performance tips and options for Citizens Band, 10-Meter, & HF radios.
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The “Screwdriver
Expert’s” Guide (239Kb ZIPped PDF)
The CB PLL DATA Book (136Kb ZIPped PDF)
Understanding & Repairing CB Radios (866Kb ZIPped PDF)
About the author (Lou Franklin)
Specific Power & Modulation Tweaks for PLL CBs.
Straight from Appendix F of our "Screwdriver Expert's Guide", this lists thousands of CB radios alphabetically
by the PLL chip they use. Find your CB model in the list and you'll see exactly
which coils, controls, or parts to tweak for maximum RF power output and modulation.
The GALAXY & RANGER Service Manual, Second Edition.
We've expanded this popular book to include tech details on even
more models.
FREE DOWNLOAD! Secrets
of Broadbanding
You just modified that CB to expand its frequency range. But it
doesn't want to tune more than a few channels up or down from the FCC band without
quitting. This illustrated reference includes many broadbanding tricks used by
the pros to cover more frequencies. You won't find this information anywhere else!
Mike Wiring Guide.
Need to rewire a mike or add a power mike? We tell you exactly
how to do it. Find out the functions of each mike socket pin or mike cable wire,
cure squeals, etc.
23-Ch. CB Crystal Mixing Charts (each 20K PDF).
Includes 95% of all mobile & base crystal-synthesized CBs!
Use these 36 charts to figure out those "dead channel" or "dead channel
group" symptoms in the older models, or figure your own new frequencies for
modifications. Download and print for a handy reference!
Channel & Frequency Chart (14Kb PDF).
Free 1-page download covers Ch.1–40 in standard band, plus 7
other bands, 4 down and 3 up. Total range shown is 25.165–28.755 MHz.
The CB EPROM DATA BOOK by Martin Pickering(948KB PDF)
Learn advanced frequency modifications using these amazing
programmable chips. This 60-page manual picks up where THE CB PLL DATA BOOK leaves off.
Even includes PC board artwork to make your own modification circuits for many popular PLL
chips. The EPROM book's now out of print, and this free download is the only
way to learn about this subject!
Please browse this Web site for the kind of
unusual CB radio stuff you just won’t find anywhere else. We specialize in
technical information and high-performance accessories for CB radios. Our products include
books, plans, kits, and modification info for CB and 10 Meter Ham operators. Over
100,000 copies of our do-it-yourself books have been sold around the world since 1976. The
giant 370-page tech manual UNDERSTANDING & REPAIRING CB RADIOS
is already in most city libraries around the U.S., and is referenced in the Grolier CD-ROM
encyclopedia. Find out why!
FREE! SAMS CB Fotofacts® Model Index Plus, including over 35 years worth of unlisted and little known model data from our own files. Over 1700 CBs. See if the tech info you need to maintain & repair those older radios is still available. Print the list for a handy reference!
Contact Us · CB Books · CB Kits · Service Manuals & Tech Info · Catalog · Freebies · Crystal Charts Mike Wiring · New Products · About Sunspots · CB & Electronic Suppliers · Feedback · How To Order!
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