[Amps] Small transformer evaluation

[Vic K2VCO]

I switched to capacitor input and changed the load to 5300 ohms. Now I am getting 438V and 
83 MA. I stuck a fuse on the transformer just in case and I will let it run for a while. 
It is noticeably warm but not uncomfortable to touch. If it can operate at this level it 
will be fine for my project.

On 9/1/2012 1:37 PM, Vic K2VCO wrote:
> Some of you will remember that I was wondering about utilizing a small Philco power 
> transformer (model 45-7011-7) for a screen supply. It puts out 380-0-380 vac plus 5 and 
> 6 v for filaments. I have hooked it up jn a full-wave ct circuit feeding a choke-input 
> filter and 20 uf capacitor. It is feeding a 4300 ohm 50w resistor for a load.
>
> I measure an AC voltage of 378v on either half of the secondary and 315v DC across the 
> load (83% of the AC). Current is about 73 ma. It has been sitting for about 20 minutes 
> and I can detect a very slight rise in temperature of the transformer. I am going to let 
> it sit for at least an hour.
>
> I think that I am proving that I will be able to draw this much current, but the voltage 
> is too low. Next I am going to try it as capacitor-input and see what happens.
>
>
> -- 
> Vic, K2VCO
> Fresno CA
> http://www.qsl.net/k2vco/