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Old 19th May 2017, 9:54 pm   #55
peter_scott
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Join Date: May 2003
Location: Edinburgh, UK.
Posts: 3,273
Default Re: Marconi 702 advice

It does rather sound as if your speaker is faulty.

EHT is certainly on the low side. What tapping are you using and what supply voltage are you using?

The knobs are fixed to the shaft by the screw passing through the slot and I guess splaying it a fraction.

Disconnect and remove the push-about coil for a more even focus.
Unfortunately astigmatism tends to result from a slight gasiness but you may find this improves after a few hours of use.

Peter
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