[TenTec] Hercules II power output (low?)

[Alan Zaur]

jon_kanter at charter.net wrote:

>Hi All,
>I recently purchased an old Hercules II power amp. I'm running it on a marine deep cycle battery that I got at Walmart (115AmpHour- biggest one they had), with a 15amp charger.
>The problem is that the amp doesn't appear to produce rated power on all bands. In fact, driving it with a 100W transmitter, I can only get the rated 500W output on 10m. On 40m and 20m I can only get about 300W out. This is either into a dummy load or the antenna tuner.
>
>The schematic shows pots for bias adjustment, but no indication of what it should be.  
>
>I called Ten-Tec, but they just recommended to send it in for service. I thought I'd first see if anybody on this list had some knowledge about this they were willing to pass along. Does anyone out there have experience that might be of help?
>
>Appreciate any assistance you can provide.
>Thanks!
>73,
>Jon AF1M
>
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Hi Jon,

That is a strange problem.  Generally speaking, you would expect to get 
more output on the lower bands from a Herc II than on 10.  Hard to 
figure.......

I am back from my travels and can probably work in a sked this weekend 
if you are planning to be around.  Either early or late in the day is 
best since I have a variety of chores that I should attend to.  I also 
bought a fancy new bike that I am trying to ride as much as possible to 
offset the guilt I feel for spending so much money on a bicycle at my 
advanced age.  There was a time when I biked 100 miles a week.  I 
haven't ridden that much in the past ten years.

Are you sure that the input filters on the Herc II are okay?

Alan