[R-390] Brought Home a R-390 Today (along With a Viking I)

[Paul Anderson]

Put a meter on the HV side.  Pull the plugs for each module until the
short goes away.  Then fix that module.

For the R-390, the most likely cause of shorts is a shorted tube,
followed by a short in the wiring harness (IMHO).

Paul

On Fri, Nov 6, 2009 at 4:44 PM, Gary Harmon <gharmon at idworld.net> wrote:
> R-390/URR
> Collins s/n 2941
> Order 14214-PH-51-93
> MWO 11-5820-294-35/1
> MFP Nov 1956  ?
>
> Homemade top cover, no bottom cover, has meters and AC cable, R-390A manual
> copy
>
> Note on PS says, "Remove tubes, modified for solid state rectifiers"
>
> Note on top cover says, " PS problems - need tubes; 6082 (2), 5651 (2),
> maybe 26Z5W (2).
> The 26Z5Ws were modified for solid state diodes.  Need to remove tubes if
> using the diodes."
>
> Radio is blowing the 3/8 HV fuse.  This action probably accounts for the PS
> problem note.
>
> Receiver is in excellent condition.  No scratches or mars on the front panel
> but several knobs could use redoing.  Gears look clean, no gook.
>
> Things to look for?  Leave solid state modification?  Other mods to do or
> look for?  Site for R-390 restoration?
>
> Gary H. Harmon, Jr. - K5JWK
> 6003 Archwood
> San Antonio, TX 78239-1504
> 210.657.1549h
> 210.884.6926c
>
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