[ARC5] Receiver AC Power Supplies

[Bill Cromwell]

Hi Jeep,

Thanks for information. It could be of value to homebrewers. I'm more of 
the overbuilder and if I have my choice of a forty pound filament 
transformer to operate my  single 6SN7 regen heater or a two pounder 
I'll choose the forty pounds of iron every time. Well okay that's a 
slight exaggeration. So I'm usually not running at the ragged edge. In 
the case of my new B+ iron it's the ratings that have me more concerned. 
I think it will be a little more than the RX plates need but not a lot 
more. If I set my coffee cup on it and the coffee starts perking some 
more I'll probably have to shop for a bigger one.

My first amp project to use a 6146 for boots on my QRP station the power 
supply was so overbuilt that when I accidentally lost the grid bias it 
toasted the 6146 without moaning or grunting or groaning. It just melted 
down 6146. The fuse had been chosen to prevent the transformer from 
melting but that didn't help the vacuum tube. I changed that.

73,

Bill  KU8H


On 12/12/2014 03:35 PM, DSP3 wrote:
>
> Tell you what I was told by Hammond when I was working with them for 
> the ART-13 transformer suite.  The word they passed was that the 
> current rating would be, in this case 2 amps... period. That's the 
> total current that could be drawn.  I've always thought exactly as you 
> but maybe they've changed the way things are rated?   If you use the 
> thing in a bridge circuit, the rating is 50%.  It appears that the 
> assumption being made is that if its CT'ed, that the expected mode.  I 
> have no idea, though, how R/S rates their xformers.  But then, what do 
> I know....  If'n it don't sag or smoke.. go with it!
>
> Jeep - K3HVG
> ______________________________________________________________