[BC] Inductor Needed

[Dana Puopolo]

The tube driver 50 kw Ampliphases had these too-but in their case the coils
were overcoupled. You reduced the amount the inner coil was inserted in the
outer to get more PA drive. The inner coil slid back and forth on a track, and
could be locked in place with awing nut.

-D

From: "Craig Healy" <bubba at dukes-of-hazzard.com>
Subject: Re: [BC] Inductor Needed

>
The 1940 vintage RCA DX5 used that between the RF driver and final.
Balanced tunable coil outside and a small coil inside that can be turned to
change the amount of coupling.  I have one in my basement from one of those
rigs I removed from WPRO-630 around 1975.  Can take a picture of it if
anyone is curious.