SB-400/401 P.S. TRANSFORMER Specs...

[k4kgw]

Hi Eddy,

Red and Red Yellow:  This winding is used with a diode voltage-doubler to provide 720V @ 250 ma.

The brown winding goes to the bias supply (-150V with no load).
Blue:  Ground (Earth).
Brown/Yellow:  95V @ 160 ma.
These three leads are actually one winding.  Brown is one end, Blue the other end, and Brown/Yellow the center tap.

Two Yellow: 12.6VAC, center-tapped.  (6.20VAC either side of center tap).  Crrent available from these is not specified, but if you add up all the rated filament draw of all the
tubes in the rig and add one or two amps, you will be close enough.

73,

Keith

Eddy Swynar wrote:

> Greetings All...
>
> Can anyone provide me with the actual specifications (including current draw) for the power supply *transformer* as was utilized internally by the SB-400/401 transmitters...?
>
> Many thanks in advance...
>
> ~73~ Eddy VE3CUI - VE3XZ
>
> ----- Original Message -----
>   From: Eddy Swynar
>   To: HEATH at LISTSERV.TEMPE.GOV
>   Sent: Sunday, January 21, 2001 3:52 PM
>   Subject: Dial Driver For "SB" Rigs...
>
>   Many thanks to all who responded to my call re. the repair and/or replacement of this critical part of the "SB" line...
>
>   I received some EXCELLENT suggestions, AND the kind offer of a replacement unit.
>
>   MANY THANKS again!
>
>   ~73~ Eddy VE3CUI - VE3XZ
>
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