[Drake] AC-4 transformer

Wed, 06 Nov 2002 08:18:50 -0300

    Hello Jim, thanks for your answer; line frequency in Argentina is 50 Hz,
but the AC-4 manual states it will work with either a 50 or 60 Hz line
(anyway, it doesn't tell nothing about efficiency).

Best regards
Guillermo - LU8EYW.

Jim W7RY escribi�:

> 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.
> >
> > _______________________________________________
> > Drake mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/drake
> >
> >