[Milsurplus] [Fwd: [MRCA] ART-13 Power Supply Transformers]

[J. Forster]

PLEASE...

READ THE MESSAGE!!

I forwarded it from another list, and said so! The OP's address is in the
header that was part of my message.

Ask HIM, not me!!!

-John

===========================




> At 18:24 28-04-10, J. Forster wrote:
>
>
>>Ladies and Gents and To Whom It May Concern:
>>
>>I have been working with the new Peter Dahl Co. regarding development of
>>a special power transformer specifically for the ART-13/ATC
>>transmitter.  The design is a single transformer, CCS ratings, that will
>>provide both the requisite 1100v and 400v B+ voltages via FW/CT windings
>>and is designed for capacitor input filter.  The CCS (not ICAS) rating
>>of the _each_ winding will be 300ma. DC.  Primary voltage will be
>>117/230v AC 60 Hz.  The quoted cost for 1-4 units is $225.  The weight
>>of each is said to be about 18 lbs.  Not a light-weight, at all!  I
>>priced out the rough equivalents in two Hammond transformers and came up
>>with about $180-$200 for the two required units.  The voltages, however,
>>are not tailored to the ART-13.
>
> Is this transformer's design predicated on choke input or capacitor input
> filters?
>
> If choke input, does Dahl produce suitable filter chokes to go with it?
>
>
>
>>Also, be advised that the transmitter will still require 28v DC at about
>>8 amps for relays, filaments, and the autotune.  I did not approach that
>>issue with this transformer, however.
>
> Ah...  therein lies the rub.
>
> Why not add a 28 volt @ roughly 8 amp winding to this beast so that it can
> ALL come from one transformer?
>
>
>
> Mr. T.  W9LBB
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