[R-390] C-551 Replacement

[Drew Papanek]

Hello,

Another method for replacement of C551, the oil-filled ACG can capacitor:
I removed the leads running to the can's terminals under the chassis.
I used a Cornell-Dubilier (CDE) DME series (available from Mouser) mylar cap 
rated 2.2 uF at 400 volts.  I cut the new cap's leads to about 1/4 inch and 
bent them into hooks. The new cap was secured with RTV to the divider 
running lengthwise under the chassis on the side of the divider facing the 
old C551.  The leads which formely wento the old C551's terminals were 
wrapped and soldered to the hooks formed into the new C511's leads.

The old C551 remains bolted to the IF chassis but is not electrically 
connected.

C548 was formerly connected from one of the old C551's terminals to ground.
A new C551 (.1 uf, 600 volt Cornell-Dubilier DME) was connected right at the 
socket for V506, between a convenient ground terminal and the grid terminal 
for V506A.  The new location is different mechanically, but identical 
electrically.  The new cap's very small size makes the relocation practical.

A sharpie marker was used to add a note about relocation underneath the 
chassis to make matters simpler for the next poor unsuspecting soul who 
works on the radio.

Drew