I've had various Henry amps with edge-wound roller inductors as the primary
PLATE tuning mechanism.
My last one, a Henry 3K Premier, used that. It used plunger-switch selected
(activated by cams on a camshaft that was the bandswitch) fixed capacitors for
each band, with the main plate tuning being the roller inductor.
You just tune for Ip dip/maximum output power (which also coincides with the Ig
peak -- all the same tuning point) just like with any other tube-type,
manually-tuned tank amplifier.
-WB2WIK
-----Original Message-----
From: Amps <amps-bounces@contesting.com> On Behalf Of Joe
Sent: Monday, September 13, 2021 12:36 PM
To: Amps Reflector <amps@contesting.com>
Subject: [Amps] Amp With A Roller Inductor?
Here's a Question,
Been hitting a dead end. I have had various AMPs all my Ham life, from 1975.
But all have been like the SB-220,
SB-220,
SB-200
FL-2100,
Henry 2K
etc.
Plate cap, load cap, tapped inductor.
and old school tube rigs Drakes mostly.
So very familiar with tuning it up.
Now I have been You Tubing, with zero results.
And just plain old Googleing,,,, and all I get are results about antenna tuners.
how to tune an amplifier with a roller inductor?
I can not find an answer to that question anywhere.
How does one tune an amp that uses instead of a tapped inductor, but uses a
roller one?
Joe WB9SBD
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