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[Amps] Which 3-500Z

To: <>
Subject: [Amps] Which 3-500Z
From: (Steve Katz)
Date: Wed, 28 Aug 2002 14:38:22 -0700
Yep, Phil.  I like the multi-tap transformers used by Ameritron.  Allows
great flexibility, although the optimum balance of filament voltage
(critical) and high voltage (not critical, but the more, the merrier) is
often not achievable.


"If everything seems under control, you're just not going fast enough." -
Mario Andretti

> -----Original Message-----
> From: Phil Clements []
> Sent: Wednesday, August 28, 2002 2:40 PM
> To:   Steve Katz; '2'; Randall DuCharme; AMPS
> Subject:      Re: [Amps] Which 3-500Z
> > When I had a 2KD5 many years ago, even its filament voltage was too high
> > with the normal 240V operating primary tap.  What were they thinking?
> (It
> > was probably just about right for operating in VK with 265V line
> voltage...)
> Prior to sometime in the 1980's, most amp manufacturers specified
> transformer primary windings for 230 volts. This was the average
> voltage found in a residence in those days. Now 240-246 volt mains
> are the norm. (at least here in Texas) Old Henry's are not the only
> amps that need checking. I have never checked an Alpha 77 series
> amp that had the proper heater voltage when plugged into a 245 volt
> line.
> (((73)))
> Phil, K5PC

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