DuMont RA-103 Doghouse lives . . . kinda. - Videokarma.org TV - Video

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DuMont RA-103 Doghouse lives . . . kinda.

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09-25-2014, 10:37 AM

bandersen

RCA 741PCS

Join Date: Mar 2009

Location: Chicago, IL

Posts: 8,826

The CRT shouldn't be an issue. All the 12" round B&W CRTs are basically interchangeable and they mostly differ in neck length.

Do you have a scope ? Could be the vertical oscillator is producing a distorted sawtooth waveform.

I'd also double check the vertical output tube, cathode bypass cap and linearity control.

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