12-04-2005, 04:26 PM
Ed - thanks. In tombstones, Model 650B was the first step down from Model 116B in 1936; Model 640B, the next step down, used the same cabinet and had the same frequency coverage; just one less tube (7 in the 640 compared to 8 in the 650). All use the same dial drive mechanism as the 116, but the frequency coverage is different.
The 650B is sort of a junior version of the 116B.
Model 660 was only available in console cabinets, not as a tombstone, in 1936. It was built on the same chassis pan as the 116 and has ten tubes. Just a slight step down from the 116 in performance; in fact, the only real difference besides the frequency coverage is the 660 uses a Type 75 as second detector-AVC-1st audio, while the 116 uses two tubes for these jobs (37 for 2nd det.-AVC and 77 for 1st audio). Oh, and the 660 has a four-point tone control; the 116 has a five-point control.
The 650B is sort of a junior version of the 116B.
Model 660 was only available in console cabinets, not as a tombstone, in 1936. It was built on the same chassis pan as the 116 and has ten tubes. Just a slight step down from the 116 in performance; in fact, the only real difference besides the frequency coverage is the 660 uses a Type 75 as second detector-AVC-1st audio, while the 116 uses two tubes for these jobs (37 for 2nd det.-AVC and 77 for 1st audio). Oh, and the 660 has a four-point tone control; the 116 has a five-point control.
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Ron Ramirez
Ferdinand IN
