Crystal for Cobra 140 GTL

[Dovebar1]

I am looking into replacing the X4 crystal (11.1125 Mhz) in
my Cobra 140 GTL to move it up into the 10 Meter Band.

Looking at the board the crystal looks like it is soldered. I am looking at purchasing a replacement online and does the crystal need to be wire leads or thicker pin type leads?

I am sure the seller will know if it makes any difference which I use.
Any help will be highly appreciated.

Thank you, Jim.

 

[N1EXA]

CRYSTAL SWITCH 6 POSITION WITH TRIMMERS & MATCHING CHROME KNOB - CB HAM RADIO | eBay

Note: Use on Scanners, Old CB's, Ham Radios, QRP Transmitters. Mount The Switch As Close To The Crystal Socket As Possible. Use For Two Crystals Or More Up To Six. Simply Remove One Crystal Or Connect Wires To Socket.

www.ebay.com

 

[Dovebar1]

I am not intending to be using it on 11 Meters.
Wanting to move it permanently to the 10 Meter
Band so I want to remove the original crystal X4
and replace it.

 

[N1EXA]

Only based on experience its not going to be solder and go.
If you can get the crystal even to Oscillate in the tank circuit the radio is going to be way
out of band for what it was intended for - Some real tech experience is goint to be needed
to see if the radio will retune out of band for receiving and transmitting.
Soldering the crystal in can cause some heat dammage so i recomended the sockets with
a variable capacitor to see if you can get it to work and a package of plastic calibration tools.

Pete N1EXA

 

[N1EXA]

I looked on the Web and found a set that puts you 40 low and 40 High

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

My Cobra 148 goes on the high side by over riding the the 3 Code inputs to the MUX
and past 27.500 to 28.000 she gets pretty numb on recceiving. Not dead though !

Do you have a listing off the web for the 10 meter crystal ?
Does this put you at 28.305 for ch 1 ?????
Thats already a 1 Mhz jump from Ch 30 27.305

Im not saying you cant do this im curious on how to do this and have a functioning 10 meter rig !

Pete N1EXA

 

[prcguy]

Hams have been converting CBs to 10m since the 60s, a crystal and tune up are usually all that's required. One early CB, the Johnson White Face was originally sold as a 10m rig and Johnson later marketed it as a CB.

I looked on the Web and found a set that puts you 40 low and 40 High

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

My Cobra 148 goes on the high side by over riding the the 3 Code inputs to the MUX
and past 27.500 to 28.000 she gets pretty numb on recceiving. Not dead though !

Do you have a listing off the web for the 10 meter crystal ?
Does this put you at 28.305 for ch 1 ?????
Thats already a 1 Mhz jump from Ch 30 27.305

Im not saying you cant do this im curious on how to do this and have a functioning 10 meter rig !

Pete N1EXA

 

[N1EXA]

Hams have been converting CBs to 10m since the 60s, a crystal and tune up are usually all that's required. One early CB, the Johnson White Face was originally sold as a 10m rig and Johnson later marketed it as a CB.

Im running my Cobra 148 on 10 Meter FT8 Mode !
Got It !
Im just trying to get this guy to tell me where he is getting A x4 crystal for the 140
and how he's going to tune it to run so far out of Band ?

Pete N1EXA

 

[prcguy]

You can probably find an old Sams Photofact manual on the radio that will have all the schematics and alignment instructions. The radio should still function to some extent with a crystal swap and you just go thorough the alignment.

Im running my Cobra 148 on 10 Meter FT8 Mode !
Got It !
Im just trying to get this guy to tell me where he is getting A x4 crystal for the 140
and how he's going to tune it to run so far out of Band ?

Pete N1EXA