EH Scott Radio Enthusiasts
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From the photo it looks like you need two tube shields plus the bases. The tube shield bases on the set appear to have been truncated.
They do not release from the top. They are held down by nuts and lockwashers under the chassis. Norman
The power supply still uses both chokes, but in the late version amp, choke L1 is mounted outboard on the speaker pedestal. Electrically, the schematic doesn't really change because of that difference, only the cabling changes.
The early version with 2 chokes on the amp uses a 5-pin connector to the speaker. The late version with 1 choke on the amp uses a 7-pin connector to the speaker; the extra 2 wires connect to L1.
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