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" <[email protected]>
To: <[email protected]>
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" <[email protected]>
To: <[email protected]>
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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