Bob -
I've never seen one of those. I thought they had the gas discharge/ gas
plasma transient suppressor (90L) used in the later TR-7s.??
It was to protect the SS front end of the TR-7 / R-7 against static
discharge and/or nearby lightning strikes. The tube fires at 90V.
73, Garey - K4OAH
St Charles, IL
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Bob W7AVK wrote:
List - The same lamp was used by Drake in an option for the TR-7 and
R7s. Called RP-7. Was sold as a "receiver protector" in a small box that
was inserted in the coax before the receiver input.
If someone needs one of the lamps I have a couple.
Also have a small number of the hard to find PIN diodes used in the TR-7
series.
73 Bob W7AVK
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