| Author |
Message |
    
Stitches
| | Posted on Sunday, March 30, 2003 - 5:18 pm: | 
|
My Cobra 2000GTL, Date of MFG.12-1991
(Philippines) works great on AM TX & RX, both TX & RX on SSB, But when warmed up for about an hour or so it won't TX on AM or SSB, but it will RX on AM & SSB. Tried PA and it will RX Signals from AM & SSB in PA position but PA does work when keyed up. I'm running a Cobra #CA-72 Mic., tried other Mic's. but same results. Any idea as to why this is happening?
Also....when this radio is turned off and I try it the next day, this same problem comes back. Thank you for your time. |
Stitches
| | Posted on Wednesday, April 02, 2003 - 6:52 am: |
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Ok......Anyone else have any idea as to what might cause this? |
307
| | Posted on Wednesday, April 02, 2003 - 9:00 am: |
|
Have you tried to adjust the VFO ever so slightly?
307 |
Stitches
| | Posted on Wednesday, April 02, 2003 - 11:37 am: |
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No sir, I didn't even think about doing that. I'll give it a try and see, if by chance this doesn't work, would this componet be ready for an R/R? |
307
| | Posted on Thursday, April 03, 2003 - 7:29 am: |
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Nope....It would be something else I am sure...
307 |
Stitches
| | Posted on Thursday, April 03, 2003 - 7:11 pm: |
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Ok, Let me know what you think it could also be so I'll be ready to check it out too 307. Thanks |
Adshar64
| | Posted on Sunday, May 18, 2003 - 2:00 am: |
|
Dont you mean the vco tuning coil? sounds like your trouble.
cheers 389 |
Brownsmillsch18
New member
Username: Brownsmillsch18
Post Number: 4
Registered: 2-2004
| | Posted on Thursday, June 17, 2004 - 10:08 am: |
|
Could be the driver/final transistors in the tx amp stage heating up. One way to diagnose it is to use a can of "freeze" spray , and spray on the driver and final transistors while transmitting. Do this and see if operation is restored. I don't understand why you guys are eluding to the VCO, he would lose RX if that was misaligned. He says he has RX.
Good luck |
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