[Hallicrafters] SX43 vs SX71 power trans swap

[Rodger Singley]

Hi Al, Tim, and group,

I pulled out my manuals and the requirements are as follows:

SX-43  B+ 270 volts at 105 mils; filament 6.3 volts at 3.8 amps
SX-71  B+ 270 volts at 110 mils; filament 6.3 volts at 4.4 amps

Al, I bet you are thinking of the SX-42 which does have significantly higher
current consumption (B+ 270 @ 150 mils and 6.3 volts @ 5 amps).

Now if I could just find a replacement transformer for my German SABA
AM/FM/LW/SW radio.  This is a large wooden table radio which is LW/BCB/SW/FM
with 5 speakers and a motorized automatic seek tuning mechanism along with a
motor "powered" volume control.  Even the loop antenna is set up to rotate.
At $10 it was a great price even though it had an obviously fried
transformer since the cabinet is immaculate.  Unfortunately the transformer
is an odd shape with odd voltages in addition to the normal B+ and filament
voltages...

Rodger WQ9E

 
> -----Original Message-----
> From: hallicrafters-bounces at mailman.qth.net [mailto:hallicrafters-
> bounces at mailman.qth.net] On Behalf Of Al Parker
> Sent: Monday, October 30, 2006 6:43 PM
> To: Tim Kass; hallicrafters at mailman.qth.net
> Subject: Re: [Hallicrafters] SX43 vs SX71 power trans swap
> 
> Hi Tim,
>     Just a quick from the hip thought, there are several more (and bigger)
> tubes in the SX-43, the filament requirements at least, will be more than
> in the SX-71, and probably the B+ voltage and/or current different/higher.
>     Gary Brown can rewind your bad xfmr, does a beautiful job, reasonable
> price.  I'm just a  satisfied customer, no other relationship.
> Al, W8UT
> New Bern, NC
> BoatAnchors appreciated here
> http://www.boatanchors.org
> http://www.hammarlund.info
> 
> ----- Original Message -----
> From: "Tim Kass" <timkass at hotmail.com>
> To: <hallicrafters at mailman.qth.net>
> Sent: Monday, October 30, 2006 7:08 PM
> Subject: RE: [Hallicrafters] SX43 vs SX71 power trans swap
> 
> 
> > Hello group, I have a SX-43 that I am trying to restore, bad power
> > transformer...I also have a junker chassis to a SX-71 that is
> good...have
> > not tore into the SX-71 yet but was wondering if the voltage
> requirements,
> > that is, the transformer is interchangeable?  Any ideas... have
> schematic of
> > the SX43 but not the SX-71 ... thanks in advance
> >
> > 73, Tim K8WBL
> >
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