[R-390] Trade tubes for meters

[Tim Shoppa]

I have a need for both a carrier level and line level meter, and I
happen to have spare tubes for everything in a R-390A (with the
exception of rectifier tubes).  Most are JAN/milspec and NIB.
The exception is 3TF7's, of which I have two used but known good units.

So, if you've got a spare meter, either "original" or a suitable
substitute, let me know what tubes you'd like in trade.

Tim KA0BTD.