Recent content by NZ8N

I bought one of the AM/FM versions a few years or so ago (2023 ??), went through the radio and compared it to the schematic with the latest LTD Classic and 29LX schematics (on cbtricks.org), other than the CPU blob and Frequency generation (not actually a PLL, it uses a Beken BK4802P 2 way FM...

The 29XLR used a uPD858 PLL. It was a whole 'nuther (earlier) chassis, than the GTL and later 29's. The main differences between the 29GTL and the 29LTD is, the GTL had red LED Channel displays, the LTD had green. Minor, if at all changes in component values, but about 99% the same. They...

The post was started in 2021. FredTx63 was last seen Apr 30,2023.

I understand the rules and wish to enter the contest. Me, three!

I have a NOS matched pair of 2SC2879A red dot from RFP I bought around 2008 or 09, never used, still stapled in the RFP card, I'll have to find them to take a pic of them.

https://cqdx11.com/cb-radio-antennas/diy-cb-radio-antenna-quarter-wave-ddrr-12-inches-high-low-noise/

I used to build Digital Voice Recorders out of ISD1000's from Radio Shack (and other such, Memo Mates, etc...) in the mid to late '90's. My design was that when a play line was triggered, automatically keyed the radio and held it keyed until the sample was finished, by sampling the voltage from...

What microphone are you trying to use? Motorola 500 series CBs used a preamplified microphone, amplifier in the mic, getting it's power from the radio.

I call it the wiper.

Just take the screws off of the clamp, detaching it from the antenna itself.

Midnight has it right, it is a No Ground Plane Firestick with the coupling coil clamp on the side, for fiberglass trucks or RV's, those were made in the late 90's. I quit CB tech'ing in 2000, so I can't say when they changed to another design. I can't find one on Google Images.

The 29GTL had a red LED channel display, the 29LTD had green. Otherwise, the same.

https://cbtricks.org/Amp/palomar_other/blue_lightning/

What voltage did you adjust the VCO to be? Should be about 1.5 to 2v on the lowest channel (Ch 1) in RX, VCO should be 16.270 MHz. Then go to the highest channel in TX, the VCO voltage should be less than 5v, even in the "upper channels".

FM Audio Path from IC4 Pin 1 C126 - 2.2uf @ 25v (+ side towards IC4 Pin 1) R160 - 15k D32 - 1N4148 - Switch to pass FM TX Audio to VCO D31 - 1N4148 - Switch to pass FM TX Audio to VCO R75 - 68k - FM +8v to turn D32-D31 on VR5 - 10k(B - Linear Taper Pot) - Adjust for FM TX AC voltage from...