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Old 04-23-2011, 05:18 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,808
Thanks. There are two tubes - a 6BK7 for the IF stage and a 6AF4 for the oscillator. It's hiding inside the drum.
You can click on the schematic to get a larger version.

That thing in the back appears to be a tunable coil for the output frequency.

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