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I got a beat up white one last week for $5. Back is missing and a side panel...Up side is it has UHF....Haven't tested the CRT yet.
Is that the series-string model? If it has a transformer, it has a 6.3 volt heater. You might have a CRT for your Predicta.
If it's the series set with 8.4 volt heater and the CRT checks good, you have to be a bit more creative.