[R-390] [r390] Question -- now PS question

[Al Solway]

Paul, david and All,

Don't know how to identify Mod status. Can't find any thing on the P/S.
S/N 2113, Contract 13214-PH-51-93. 

Paul, about Dave's P/S notes. He mentions that the HV CT goes to Pin 14
on P118. Well on mine it goes to Pin 15. There seems to be a few other
anomalies in the P/S wiring. I don't have time now to get into this
deeper at the present time. The radio is all in pieces. Waiting for
spring to truly arrive here in Montreal to refinish the front panel. My
apartment balcony is my paint shop.

I am working on a solid state module to replace the 6082 regulators.
This is how I found the wiring problems. I am using the P/S and the
Audio Chassis as a test bed for the module. Some problems but will be
contacting the engineer involved in the design. Me, I am just an old
Tx'd tech so need that engineering help.

Al 


> Al - were you using a mod-1 power supply, and have you found any chassis
> wiring differences?
> 
> I'm very confused by this because I'm looking at three different 390/391
> power supplies, and there are indications of them having been wired three
> different ways:
> 
> no-mod PS prior to HV CT change
> no-mod PS after HV CT change
> mod 1 PS with HV CT going to a different place altogether
> 
> The way I read David's page, he mentions two - no-mod prior to HV CT
> change, and no-mod after HV CT change, but as near as I can tell, not the
> mod-1 PS.
> 
> I can get the exact pinout differences if it would help anyone.
> 
> Does anyone have a mod-1 r-390/r-391 power supply to compare notes with?
> 
> The reason that I care about this is that I have this mod-1 power supply
> that appears to be factory wiring, but it doesn't work in a chassis that
> does work with a no-mod post HV CT change (the one Dave relates on his
> page).
> 
> What that means is there must be a corresponding chassis change for a
> mod-1 power supply that I need to be looking for, too, and I want to know
> what that is before I needlessly hack a good original mod-1 PS.  Hope this
> makes sense.
> 
> Paul Anderson
> 
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