[Drake] AC-4 transformer

Tue, 5 Nov 2002 20:41:06 -0800

Are you using 50Hz or 60 Hz ?  That may make a difference!

73
Jim W7RY

----- Original Message -----
From: "Guillermo" <[email protected]>
To: "Drake" <[email protected]>
Sent: Tuesday, November 05, 2002 7:57 PM
Subject: [Drake] AC-4 transformer

>     Hello all, I'm new to the list; I've an old Drake TR-4 from a
> friend, and the transformer of the AC-4 power supply takes a high
> current from its primary, when connected to 120 Vac and with all
> secondary windings disconnected; it was measured something about 1.7 A,
> the core keeps warm (normal temperature I think) even after 40 minutes
> of use in the above condition. All secondary voltages measures ok, 255,
> 95, 105 and 13.5 Vac.
> Another thing I've noted is that at 110 Vac it takes only 0.9A of
> current, the strange behaviour for me is that  when I raise input
> voltage to 120 Vac  (with a Variac) primary current raises very
> abruptly, �is this transformer performing as designed?.
>
> TIA
> Guillermo - LU8EYW.
>
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