[Hallicrafters] SX-28A Audio Transformer

[mac via Hallicrafters]

Skip,

Your transformer may be OK.  The two sides of the primary will each  
have essentially the same number of terms but
the DC resistances will be different because diameter of the windings  
and hence the the LENGTHS of the (very fine)
wire on each side will be different. I just checked a unit I have, (10  
Kohms CT primary to 8 & 16 ohms secondary)  and
one side of the P-P primary measures 440 ohms DC to center and the  
other side reads 360.  Anyone else out there
have an original SX-28 unit they can measure?

Dennis D.  W7QHO
Glendale, CA

**************
On Apr 22, 2014, at 3:19 PM, Waldo Magnuson wrote:

> Hi,  I'm still struggling with my SX-28A.  It seems I might have  
> need for a replacement Audio  Transformer.
> Mine measures unbalanced in the output windings (230 and 166 ohms -  
> they should be about the same to
> balance out the hum which I get a lot of).  The book part number is  
> 55B052 but mine has p/n 55B009 which might
> not mean anything.  The SX-28, 28A and probably other Hallicrafters  
> which use push-pull 6V6 output tubes
> will probably have a similar transformer.
>    So are there any parts receivers out there which could part with  
> the Audio Transformer?  I would appreciate
> hearing from you.  Thanks.
> 73,  Skip  W7WGM
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