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Dual tube for M4 changer
Radioroslyn
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#4

06-13-2016, 10:12 AM
Well the actual switching is done by the radio/phono switch of course. The amplifier stages are on all the time they just are amplifying what ever signal is being sent to it. The on line schematics are awful for this set!!! But it's either the 7F7 or the 7AF7. They call the 7AF7 the "phono amp". The 7F7 maybe used for tone compensation but it's hard to tell.

Terry
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Messages In This Thread
Dual tube for M4 changer - by clockman1954 - 06-09-2016, 11:27 PM
RE: Dual tube for M4 changer - by Radioroslyn - 06-10-2016, 05:17 PM
RE: Dual tube for M4 changer - by clockman1954 - 06-12-2016, 11:56 PM
RE: Dual tube for M4 changer - by Radioroslyn - 06-13-2016, 10:12 AM
RE: Dual tube for M4 changer - by clockman1954 - 06-13-2016, 05:38 PM
RE: Dual tube for M4 changer - by Radioroslyn - 06-13-2016, 06:05 PM



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