[MRCA] UPDATE ART-13 Power Transformer

[D. Platt]

OK,

I got a reply from the Peter Dahl/Harbach folks.  The updated 
transformer will have the following specs, shown below.  The voltage 
shown are the actual AC voltages and the design is for a FW bridage with 
capacitor input filter for each supply voltage.  The 28v supply is 
designed for a nominal 50,000ufd filter, only.  The voltages may look 
low to some but remember we're going to use capacitor input so one has 
to multiply by 1.4 to get the actual voltage.  The 20v winding is 
designed to provide 28v at about 7 amps under continuous duty.  I made 
some measurements on my ATC and found that when the autotune is engaged 
the current draw is about 9 amps (which is at the max rated current of 
the winding of the proposed transformer).

Primary:  117/230vac 60Hz.
Sec 1   850v @.5A CCS
Sec 2   300v @ .5A CCS
Sec 3   20v  @12A CCS
Weight est. 30 lbs.


The price for quantity 1-4 is $280 each.  The price for the transformer 
without the 28v winding is around $220 each.  That looks to be the 
bottom line.  I've been told there can be a price break for quantities 
above 4.  That's for either one, not an aggregate of both.  I will 
probably opt for the transformer with just the two HV windings just to 
keep the price down and as I already have a few 28v switching supplies I 
can use.   I'll be writing all this up in Electric Radio as soon as my 
NIB ART-13 arrives at the end of the month and I get it on the air. 

Please let me know again who may be interested in which transformer.  
I'll keep a list and let everyone know via MRCA what the quantities are 
up to in... say 7-10 days?  Beyond that, I would suppose that it will be 
everyone for themselves.  Jeff at Peter Dahl/Harbach is who I'm working 
with and he knows what's up with the ART-13 transformers.  Anyone with 
comments, please pass them on.

Jeep/K3HVG