Cobra 142 GTL No AM Carrier

[Mike Jones]

Hello,

I'm hoping someone can help me figure this out, I have a Cobra 142 GTL which had a week AM Carrier: 1.7 watts so I looked up AM Power adjustment and it points to VR6

I open the radio, try as I might unable to locate VR6 however I find 2 variable resistors not labeled near VR7 so I try the 1st one and no improvement, put it back to where it was previously adjusted as far as my eyes and memory can tell me, then I move on to the next unlabeled VR, move it, check meter and nothing, then I notice I have no carrier power at all but the meter swings to about 9 watts with modulation and no carrier, just like it's on SSB, no carrier on AM now but it swings to 9 watts with modulation with a good radio check from a neighbor.

I can't get it back to my 1.7 watt carrier no matter how I adjust those 2 unlabeled VR's... any ideas?

73's

--Mike

 

[Robb]

VR6 is the AM power control
Here are all of the adjustments for your chassis.
Be careful.
http://www.radiomods.co.nz/alignments/pc385align.html

 

[Mike Jones]

Thanks Robb, now if I could only locate that elusive VR6...

 

[sonoma]

VR6 is by the transformer. here is a radio that is the mobile but is the same as the cobra 142 board. page 13 shows the layout of the VR's you are looking for. remember the 142 is just a mobile radio in a large case.

http://www.cbtricks.com/radios/realistic/trc_450/graphics/realistic_trc_450_sm.pdf

 

[Robb]

Facing the front of the radio, it is in the rear right corner underneath the wire bundle.