[Amps] Old SB1000 built by me in 1988

[Jim]

What type of an exciter are you using with this amplifier that you need ALC?

Thanks
73
Jim W7RY

On 12/13/2020 12:53 PM, Ken Florence wrote:
> Hi all,
> After a long time of having an intermittent no power out problems on 
> my amp, I finally figured out the problem was the parasitic 
> suppression circuit. I had put one of Rick Measures (SK-RIP) Nichrome 
> kits in it. Not sure if there was a solder joint issue or what, but 
> went back to the stock suppressor, replaced plate choke (original with 
> resonance issue on 17 meters) and it works fine. At least 40 through 
> 10. I notice when I tune it up on 80 meters I get a quick sizzling 
> sound sometimes (very short duration). I assume that is an arc? I need 
> to get the ALC line back on cause it's obvious it only needs about 75 
> watts input for full output. New Graphite tube. Have not tried 160 yet.
>
> So could it be a little over driving it on 80 that is causing that, or 
> if not, how do I narrow down where it is? Definitely nothing burnt 
> cause I went over it with a fine tooth comb.
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