[Boatanchors] Bucking Autotransformer - use as combination bucking and isolation?

[Rob Atkinson]

Okay on the 15 A breaker.  I use a combination of auto-transformers
(buck/boost) and variable auto-transformers (Variacs).  All purchased
at hamfests over the years.  These are nothing but a coil with a lot
of taps; no secondary.  The variables have a wiper instead of a bunch
of fixed taps.  Whether or not you want to run a load off of line v.
depends on the circumstances.  I have a Hallicrafters TO Keyer that
doesn't work unless it has 120 or more volts.  However I have a 70
year old Hallicrafters transmitter that will have excessive screen v.
on 807s unless I run it on its designed 115 or less v.

73
Rob
K5UJ

On Mon, Feb 19, 2024 at 4:10 PM Ben Hall <kd5byb at kd5byb.net> wrote:
>
> Hey Rob,
>
> Something like that.  What I was trying to say is that any boatanchor receiver powered from standard mains (15 amp breaker) would be completely over-killed by this transformer.
>
> For sure, you're correct, I know of no BA RX that pulls more than a few amps!  Hence this transformer being so totally overkill in an autotransformer bucking configuration.  Even an SP-200 I think has it's power supply fused at 3 amps IIRC?
>
> thanks much and 73,
> ben
>