Search results

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...

Maybe in parallel like ladder line?

Most likely culprit is C117 next to L3 is shorted. But, can be any of the other red circled items, too, these are either tied directly to, or low resistance to the PTT line of the Mic socket. last time I helped someone with a Cobra 29 a few months ago, that had TX all the time, it turned out to...

First, it says it's a Wowza RS918 CB, then it's a TH-9800 ??

No, in the Cobra 29GTL/LTD etc... radio, the input of the board goes to Pin10 where C94 used to be connected to, the capacitor of the output of the 2 ICs goes towards the tripler coil. C89 is the cap in series with the Varactor Diode, increasing this from 47pf to something higher, or parallel it...

https://cbworldinformer.com/channel-board-for-cobra-146gtl-uniden-pc-122xl The directions are for the Uniden PC122, all references in the web page are to this. Pin 10 of the PLL is the 10.240/2 output, or 5.12 MHz. This through C67, goes to the Tripler coil, to generate 15.360 MHz, to mix...

This is how I broadband some radios to increase their frequency range. I had a GE 3-5804D (PLL02A) that went from 25 MHz to 30 MHz, with about .5 watt drop in power from center to band edges, the entire 511 channel bandwidth of the PLL. I made my own FM boards too, on perfboard. It looked...

What are the crystal frequencies? There are 2 grey heat shrink covered crystals on the top of the switch board, and looks like 2 more on the bottom of that switch board. They are going into an epoxy covered board that has 2 coils, and what looks like a TA7310 oscillator/mixer IC like what is...

TR32 looks like it has been desoldered and removed. Can't tell if there were any other things done (cut/removed) from the solder side of the board.