[TMC] GPR-90 Receiver is ailing

Mon, 03 Mar 2003 17:37:21 -0600

James Duffer wrote:
> The power supply electrolytic filter capacitor C-104 failed.  I have a 
> tentative replacement on the way....but the working voltage is only 
> rated at 400 VDC.  The original is rated at 500 W.V.
Jim
My docs are stored but looked at my unit and C-104 shows 450 WVDC not
500. The actual voltage is about 300 on my unit so I think the 400 
should be ok.
> Another problem, only band 3 of this unit is functioning and at very low 
> output.  What is a good contact cleaner that will not leave a harmful 
> residue?
Deoxit 5 is used by all the BA guys. I used 99% alcohol initially and
it worked quite well. Never bothered with the Deoxit.
Check the antenna input. Not at all conventional. Mine was screwed up
by a previous owner with a SO 239 improperly connected. The original
doesn't use that at all but paired feed to a transformer T1.

Mike
Iowa


> Thanks in advance.  Jim, wd4air
> 
> 
> 
> _________________________________________________________________
> MSN 8 with e-mail virus protection service: 2 months FREE*  
> http://join.msn.com/?page=features/virus
> 
> _______________________________________________
> TMC mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/tmc
>