[ARC5] Transformer questions

[WA5CAB--- via ARC5]

No.  Watts in = Watts out (less losses).  If "NT" means "No Tap", then the 
higher secondary is rated at 37.2 watts.  If you use a voltage doubler, the 
max current you could draw @ 100% efficiency would be 0.075 A.  The nominal 
current drawn only by the 1625 plates is around 200 mA.  At 550 VDC, that's 
110 watts.  So the Heath transformer is too small by about 3X even before 
you add the screens and oscillator.

In a message dated 08/15/2014 17:00:04 PM Central Daylight Time, 
andrewkopke at rocketmail.com writes: 
> Hello , I have a heath 54-179 power transformer used in heath HW-16 and i 
> think SB-220 . The ratings are :         Red wires 248V NT .15A
>                                                                            
>                                                                            
>            Brown wires 105V NT 30ma
>                                                                            
>                                                                            
>         yel, yel-green wires 6.3V NT 5.5A
> I was wondering if this sounded like anything that could be utilized for a 
> ARC -5 transmitter supply
> I think it can produce 700 volts @ 250 -300ma when used with a voltage 
> doubler
> 
> Thank you ,Andrew Kopke

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480