[R-390] R 390 problem

[n4buq at knology.net]

Lack of filament on V505 is probably due to an open 3TF7 regulator tube.

Barry - N4BUQ

> This is my first shot of explaining a problem with my R 390 receiver.
> 
>   1.. Chassis is hot at 80 V AC
>   2.. V 505 no filament but checks good
>   3.. Test point E 211  Attached rf generator & lots of signal
>   4.. Test point E210 attach signal generator   no signal
>   5.. V  6C4  checks ok
>   6.. V 401 6AK5 checks ok
>   7.. Original problem was 1 dead 26Z5 
>   8.. Install 2 new replacement.
> Not sure if there is more info I can give you but would appreciate any 
help from any of the owners of this wonderful receiver, on this interesting 
site.
> 
> This radio had never been worked on until the two 26z5 replacements were 
installed.
> 
> Kal  VE9PK
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