[R-390] New (to me) R-390A

[Norman Ryan]

Hello, Barry, whichever one you are,

There is a little curved blip on top of the socket base where the tube
shield goes that indicates the space between the socket's first and last
pins.  One can feel around for it and use it to get an idea of how to
orient the tube before inserting.

This may be helpful if the line drawing isn't on hand.

73 de Norman KG4SWM


blw wrote:
> ... I can
> get all of the tubes out, including V207. The problem I had was orienting
> the tube correctly when putting tubes back in since I couldn't see well. I
> scanned the line drawing of the top and bottom layouts of the radio. I use
> these sheets to write notes when I test all of the tubes, etc. The most
> useful thing about using prints of the layouts is using notes on each tube
> base how the tube should go in. I drew almost complete circles to indicate
> the pins for each socket. I look at the sheet and orient the tube right
> before trying to push it down into the tube base. ...
>
> the other other Barry