Gonset G-50

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WB4YVO:
Ok new problem.. Radio motorboats.. Any Gonset Experts out there??

When squelch is off turned fully CW and I turn up volume at about 1/2 way its motorboats.. Then if I keep turning the volume up it gets loader and faster.. Have checked tubes and replaced as necessary.. Checked the resistors around the squelch circuit.. replaced 2 .. But still same .. Checked the 6AL5 voltages

Pin 2 Plate 99.3 volts no squelch 49.6 volts squelched
Pin 5 Cathode 108.9 volts no squelch 98.4 volts squelched

Other side ( other diode )

Pin 7 0 volts both ways
Pin 1 0 volts both ways

My B+ voltage is 259 Volts

Help

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w4bfs:
have you recapped?

WB4YVO:
Yes.. There were only about 2 or 3 besides the electrolytic and the bypass caps..

Skip

w4bfs:
this is not specific to a G50 ...motorboating audio stages usualy happen when one of the power suppy decoupling electrolytics or other large value dry out ... you might try bridging an additional 10 uF or so to see if there is any improvement ...

other things are resistor value changes and corroded ground connections ...

WB4YVO:
Ok will give it a try..

Thanks
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