Cobra 140 GTL

[Dovebar1]

Hi,

I have a Cobra 140 GTL, really nice radio.
Have 2 things with it I am looking into.
First: How to modify strictly for 10 Meters.

I realize that the best way would be to change out the crystal in the vco. I believe it is a 11.1125 Mhz Crystal.

So if I want Channel 1 to be 28.415 Mhz, then I would change it to 12.0716 Mhz. So that is part of my
Question, is that correct?

Then if that is correct then where is a good inexpensive source for that?
Also, would anyone know where a service manual or a Sam's Photofact can be purchased at a fair price?

Thank you, Jim.

 

[N1EXA]

OK
I have the 148 GTL and by switching pins 10 11 and 12 on the Processor I can up to 28.085 ID say she is pretty Numb up there but it runs.

Never tried changing the Oscillator Crystals.
Dont know if the tank circut will tune that far off of frequency?

Pete N1EXA

 

[N1EXA]

Hi,

I have a Cobra 140 GTL, really nice radio.
Have 2 things with it I am looking into.
First: How to modify strictly for 10 Meters.

I realize that the best way would be to change out the crystal in the vco. I believe it is a 11.1125 Mhz Crystal.

So if I want Channel 1 to be 28.415 Mhz, then I would change it to 12.0716 Mhz. So that is part of my
Question, is that correct?

Then if that is correct then where is a good inexpensive source for that?
Also, would anyone know where a service manual or a Sam's Photofact can be purchased at a fair price?

Thank you, Jim.

Try these guys.

Barkett Electronics

stores.goldeneagleradios.com

Crystals - Browning / Tram / Cobra Mobile - Page 1 - Barkett Electronics

stores.goldeneagleradios.com

 

[N1EXA]

Only Found freeband for the 140

CB Radio Crystals For Cobra 140GTL, 142GTL, President Washington Uniden HI - LO | eBay

President Washington, MCKINLEY (1011001), P400 Base Cobra 140GTL, 142GTL. Uniden Washington Base. 1 PAIR OF HIGH & LOW PLL CRYSTALS FOR CB RADIOS. Use With Any Crystal Switch To Add HI & LO 40 Channel Bands.

www.ebay.com

 

[N1EXA]

hey for $10 you can try it!

CB Radio Crystal PLL FITS Cobra 140GTL 142GTL etc - HI CHANNEL ONLY | eBay

Cobra 140GTL, 142GTL. 1 Item of 40 Channel PLL CRYSTAL FOR CB RADIOS. Fits Any Model Radio With Original Crystal Of 11.1125. Such as the 6 Position Crystal Switch Kit. Note: This is The Smaller HC25U Plug In Crystal.

www.ebay.com