[Amps] Alpha vs Henry

[Patrick Barthelow]

Gentlemen: 
If you are pushing for enhanced reliability in a Ham manufactured amp, run above its ratings, 
say a Heathkit SB 220, and focus on the  heat in the transformer being a power limiting, 
or a long term reliability factor, and since I would guess the the source of the heat, and probably 
the location of the highest  temps is deep in the center of the core laminations,  
could you significantly lower the transformer temp where it counts with external cooling 
fans on the transformer?   If the external core of the transformer under heavy Amp use, were
very hot to the touch, sort of "ouch, that's hot!"  with Pain threshold in 1/4 second of fingertip contact,
how hot might that be, and say, if it was say, 190 F on the outside of the laminations, 
how much hotter is it likely to be on the inside center core?

Best Regards,   
Pat Barthelow, AA6EG
 apolloeme at gmail.com  
      MOONBOUNCE     YURI'S NIGHT

> Date: Wed, 6 Apr 2011 03:23:04 -0400
> From: sub1 at rogerhalstead.com
> CC: amps at contesting.com
> Subject: Re: [Amps] Alpha vs Henry
> 
> On 4/6/2011 12:47 AM, Fern wrote:
> > You can eliminate a lot of that weight by using a switching power 
> > supply. Fern   VE7GZ
> 
> True, but as we've gone through on here several times, it's not a simple 
> matter to build a 2500 to 3000 watt switching power supply with good 
> regulation, low ripple, and no noise.  It's done and the little Tokyo 
> Hy-Power HL-1.5Kfx and larger amps are good examples.
> 
> 73
> 
> Roger (K8RI)
> <snip>
> 
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