this is my first encounter with a spinning disk/oilcan delay thankfully the "can" is ok and seems to be functioning normally but the unit hums like crazy!
i've subbed all the B+ filters with no change to the noise not sure where to look next...
anyone familiar "adineko" type delays?
i've subbed all the B+ filters with no change to the noise not sure where to look next...
anyone familiar "adineko" type delays?
this is what i've found there are some additional .o1 ceramics in the unit i have not sure what their function is.
members of dedicated forum have commented that the 7199 tube is not noted for it's noise performance.
members of dedicated forum have commented that the 7199 tube is not noted for it's noise performance.
Make sure the playback head is properly grounded on the screen. We are high impedance here and a loose/broken wire will cause havoc.
shielding in these is indeed questionable.
wish i had taken pic's of it while i had it on the bench.
best i could do to help reduce residual hum was to re-dress the heater leads by twisting them and shortening the run
the other thing i've noticed is the supply isn't like the schematic i linked to it had an independent 6.3 v winding not a main B+ derived supply
wish i had taken pic's of it while i had it on the bench.
best i could do to help reduce residual hum was to re-dress the heater leads by twisting them and shortening the run
the other thing i've noticed is the supply isn't like the schematic i linked to it had an independent 6.3 v winding not a main B+ derived supply
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