[Elecraft] very small 20A switching PS

[Charlie T, K3ICH]

Curiously, I have found that certain switching supplies can actually deliver 
quite a bit more peak, or very short duration current than their ratings 
would imply.  For example I was testing a TS-480 HX running from a 25 Amp 
Astron switcher and was getting the full rated 200 watts out momentarily 
with barely noticeable voltage sag.   At this level, the total supply 
current was around 35 Amps.  Now, admittedly, I did not look at the DC 
waveform on a scope, but the SSB transmit audio sounded fine which to me, 
implied it was clean.  I'll have to try again and look at the waveform. 
It'll have to be with resistor loads since I don't own the HX now.

73, Charlie k3ICH


----- Original Message ----- 
From: "Charlie T, K3ICH" <pincon at erols.com>
To: <elecraft at mailman.qth.net>
Sent: Sunday, September 21, 2014 8:00 AM
Subject: Re: [Elecraft] very small 20A switching PS


> "Gamma" something.
>
> Basically, a bank of Super Capacitors fed by a 5 (?) Amp switching supply. 
> And yes, VERY  small (&  very expensive too) even when compared with the 
> smaller 25 Amp switching supplies.  However, those "larger" supplies can 
> do 20 Amps continuously, but the Gamma can not.
>
> 73, Charlie k3ICH
>
>
> ----- Original Message ----- 
> From: "Howard Sherer" <hms4 at Lehigh.EDU>
> To: <elecraft at mailman.qth.net>
> Sent: Sunday, September 21, 2014 6:50 AM
> Subject: [Elecraft] very small 20A switching PS
>
>
>>A few years ago there was some discussion here about a very small 12 v 20A 
>>switching PSU with very low noise that was designed for radio use. I am 
>>now interested in one for use with my KX3 & KXPA. Can someone point me in 
>>the right direction.
>>
>> Howard AE3T
>>
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