[Boatanchors] Xfmr temperature?

[Richard Post]

** Warning - LETHAL High Voltages.**

John,

I put the 3 volt magnetron filament winding in series with the 
primary.  Same idea, similar results.  Did a current draw check when 
wiring up a pair of unloaded trannies (wired for full wave, grounded 
center tap).  Feeding by variac, the last few volts before 120 caused 
a substantial increase in current draw.  Looked liked a saturation 
point was reached.

Pic of power supply on web page.

<http://oak.cats.ohiou.edu/~postr/bapix/813amp.htm>


73,

Rich KB8TAD



At 11:26 AM -0700 1/12/04, <msix@nmia.com> wrote:
>Testing several microwave xfmrs for an HV supply
>showed the idling core temp stabilizes around 175F.
>
>Adding 4 turns to the primary lowered it to 140F.
>
>Wonder if others have seen the same thing?
>73 John W7ZFB
>