Does it have a soft start relay in the PS primary circuit? Maybe the relay
isn’t pulling in. Also make sure the connections in the AC line plug are OK.
Vic 4X6GP
> On 12 Dec 2017, at 8:12, mike george via Amps <amps@contesting.com> wrote:
>
> hi new to list hope someone can help with this. fired up the 425 and noticed
> the 1500wts was down 3 or 4 hundred wts. looked at the rf deck and the lights
> were dimming out on peaks.the plate and grid current is ok but the plate
> voltage drops from 2200 to 1500 on peaks.i tried on dummy load same result.
> other amp on same 220 outlet works fine on same ant. i dont see anything
> obvious inside the power supply. tubes are not getting hot. not sure where to
> go. thanks mike george
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