Fred,

In my last post i referred to the larger supply first as a 35 amp, then 
as a 30 amp.   It is a rs-35, which i think is rated at 30 amps constant 
and 35 surge.   The smaller one is rs-20 which is 17 amps constant and 
20 amps surge.

They also have larger and smaller supplies, but these are the 2 I have 
here.   Hope you at least got a rs-35 which will give you all the power 
you will likely need.

73, Steve KW3A

On 2/22/2011 2:53 PM, Steve Forst wrote:
> Fred,
>
> I do have a 20 amp and a 35 amp in the shack.   The 20 amp has 12 fins
> on the rear heat sink and 2 transistors mounted in the gaps between the
> fins.
>
> The 30 amp has 24 fins and 4 transistors  in the gaps between the fins.
>
> There might be a better way to tell, but hope this helps.
>
> 73, Steve KW3A
>
> On 2/22/2011 2:31 PM, Fred Adams wrote:
>> I recently picked up a large Astron power supply but the owner had no
>> paperwork on it.  Do any of you guys know if there is any way to tell the
>> size?  I believe it is a 30 or 35 amp supply but I do not know for sure.
>> Thanks much,
>>
>>
>>
>> Best wishes,
>>
>>
>> FRED C. ADAMS W4HC
>> THE HOUR IS LATE AND
>> THE NIGHT IS FAR SPENT
>>
>