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

[Thomas Adams]

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