Thread: Tv62
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Old 26th Mar 2010, 5:04 pm   #44
ppppenguin
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Default Re: Tv62

I wouldn't expect a hum from the speaker at this stage. You need a working audio amp for that which needs HT.

For part 2, plug the TV directly into the mains so the heaters get full volts. Make yourself a nice lethal mains plug to croc clip lead. I usually use a Safebloc and a couple of flyleads or an IEC male with a length of flex rather than the traditional mains to croc clip lead. Plug that into the variac, connect the neutral to chassis and live to the end of F1 that's connected to the anodes of V18/V19. Make sure that both TV and variac are running from the same RCD otherwise you'll have funny trip problems. Make sure that variac neutral is the same as mains neutral - use a meter with power off - otherwise something will complain.

Be aware that there is no single point of isolation with this setup. Make sure both plugs are unplugged before you go delving.
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