[Heathkit] Help on HO-10

[peter markavage]

Replace both resistors on both legs of the focus pot and up their
wattage. If the 1600V caps have never been replaced, replace them. Check
all the resistors in the power supply area to be sure they're in spec. If
they're more than 10% off, replace them. I've never owned a HO-10 that
didn't have some AC ripple on the base line. Check and/or replace bad or
weak tubes. Check voltages on tube pins for leaky or shorted caps.
Pete, wa2cwa

On Tue, 1 Feb 2005 19:18:36 EST OTAKEBI at aol.com writes:
> I just acquired a Heathkit HO-10.
> When I plugged it in the light came on but no CRT line.
> opened it up and could see no burn marks so I cleaned all tube 
> pins.
> I also cleaned all the pots.
> When I plugged it back in got a CRT line on the scope.
> However, the line is fuzzy even with the focus control all the way 
> to the 
> right.
> Also, see ripple on the line.
> I will be going back into the unit in the AM.
> I did find an oil film on the large.15MFD 1600VDC cap that goes to 
> IV2 tube.
> The cap is not swollen and does not show signs of damage and the 
> film could 
> have been from the previous owner spraying tuner cleaner.
> I plan on testing all tubes in the morning.
> Any other ideas to play with from anyone who might have gone through 
> this 
> type of problem and fixed it?
> Thanks in advance,
> Dan/N4VET
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