[Boatanchors] DOW KEY info

[Dave Roscoe]

Can someone fill me in on info  re:  a Dow Key TRM-1 changeover relay. =
It uses a 6EH5 tube.  I think they use the same scheme as the EF Johnson =
 model  but not sure.

1. What are the power supply requirements for the tube ?
2.  Which are the RX and TX terminals?   Since there is no "hard" =
contact  (as from a relay) , I am not sure how to pin down which is =
which.  A schematic would help too.

Thanks in advance from:
   Dave W1DWZ

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