Quote:
Originally Posted by kf4rca
Picked up a GE Portacolor from the roadside chassis AB-E. Believe this is the last one made. Cleaned it up and upon powering it up, it immediately went into shutdown. Disconnecting the CRT board, I found it would power up. Checked CRT but no short.
Reconnected CRT board and disconnected HV anode, it would power up also.
Checked HV but got no HV DC. BUT, I could pull a pretty blue arc from the anode lead. How can this be with an integrated HV rectifier built into the transformer. The internal rectifier was shorted allowing AC to pass.
Checked around and a new HV transformer was simply not available and neither were any NTE replacement rectifiers.
So, I would have to go Old School and wire in a 3A3 and socket into the upper corner of the cabinet.
And it works!
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How are you powering the 3A3? Using a solid state replacement, R-3A3/ECG508? An ECG/NTE513, or an ECG527a would also work - I used one on a Sharp once that too had a shorted internal rectifier in the tripler.
Not a Porta Color - they stopped that marketing with the 10JA chassis in 1977. Simply a 13" GE Portable Color.