Jim,
What is the measured output voltage of the supply when you are drawing 60A
keydown?
If it is still up around 13.5 Volts, then your supply is fine and you
probably have some sort of "rf into your audio" problem. Check your
grounding and/or by-passing. A line isolator between radio and amp may help.
If your supply is sagging under the 60A load, then perhaps a lead acid
battery in parallel will help under ssb peak power conditions.
73, Alek. VK6APK
At 01:24 PM 09/09/1999 -1000, Jim wrote:
>
>Hi,
>
>I have an Astron RS-70M, 13.8 volt supply. It provides,
>per it's meter, about 45 amps to my small Henry Radio
>SS500 solid state linear when driving 200 watts from the
>amp into a dummy load (40 meter band). At about 380
>watts into the DL, the power supply current meter reads
>about 60 amps.
>
>The supply is spec'd at 57 amps, continuous and
>70 amps ICS.
>
>When using in SSB on the band, I am told my audio begins
>to sound distorted if I put out much above 250 watts on SSB
>peaks.
>
>I assume the problem is that the RS -70 supply has run out of gas
>around such SSB peak levels.
>
>What does 70 amps ICS mean? Whatever, presume it does
>not mean that I can run up to 350 watts SSB peak using this
>supply.
>
>73, Jim, KH7M
>
>
>
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