[R-390] R-390 Rectifier Stack Replacement

Cecil Acuff chacuff at cableone.net
Sun Jun 17 16:52:31 EDT 2007


I have used a square bridge rectifier...one with a hole in the middle and 
mounted it to the bracket used to mount the original selenium stack.  No 
worries about the difference in voltage drop.  Solder up the wires to the 
shortened leads and cover them with some heat shrink.  Project completed!

The bigger problem are the 4ea. 47 ohm resistors...two under the regulators 
and two under the audio deck if I remember correctly.  Change all of them 
out with 5 watt wire wounds.  May have been more than 4 total...I'd have to 
go back and look at my pictures...

Cecil Acuff
K5DL
----- Original Message ----- 
From: "rbaldwin14" <rbaldwin14 at nc.rr.com>
To: <R-390 at mailman.qth.net>
Sent: Sunday, June 17, 2007 9:42 AM
Subject: [R-390] R-390 Rectifier Stack Replacement


Can any one direct me to a schematic and/or instructions on replacing the 
rectifier stack in an R-390 Power Module?

This would be a NON - A model.

Thanks in advance for any of the collective wisdom.

Rich Baldwin
KD6VK
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