12-12-2023, 10:52 AM
No thanks I've had enough of them...
!st a legible schematic can be found here on pg 250: https://www.worldradiohistory.com/Archiv...37-ABC.pdf I appreciate your gallant effort in drawing a diagram of the osc but w/o the tube's elements it does little good, mostly cause I'm a lazy bum at heart. I re drew a simplified diagram of the osc circuit to make it easy to follow. Crosley must pay their draftsmen in string and used bubble gum. Schematic are the WORST!
Replacement parts need to be solder in close to where they go. Not clip leaded in, lead length is important in osc circuits. Clean ground connection are good too.
The 6A8 is operating as a pentode oscillator and the in between grids are either for inputing the signal from the ant coil or to speed up the electrons to get them up to the plate. So mostly we're focused on grids 1&2& the the very top one (suppresser).
As you know the osc's output needs to tune a range of frequencies from 1000kc to 1900kc to cover the bcb. Double check the paper work that accompanies the replacement coil to be sure that the windings are connected properly
And now for the mystery question where are the original coils???
!st a legible schematic can be found here on pg 250: https://www.worldradiohistory.com/Archiv...37-ABC.pdf I appreciate your gallant effort in drawing a diagram of the osc but w/o the tube's elements it does little good, mostly cause I'm a lazy bum at heart. I re drew a simplified diagram of the osc circuit to make it easy to follow. Crosley must pay their draftsmen in string and used bubble gum. Schematic are the WORST!
Replacement parts need to be solder in close to where they go. Not clip leaded in, lead length is important in osc circuits. Clean ground connection are good too.
The 6A8 is operating as a pentode oscillator and the in between grids are either for inputing the signal from the ant coil or to speed up the electrons to get them up to the plate. So mostly we're focused on grids 1&2& the the very top one (suppresser).
As you know the osc's output needs to tune a range of frequencies from 1000kc to 1900kc to cover the bcb. Double check the paper work that accompanies the replacement coil to be sure that the windings are connected properly
And now for the mystery question where are the original coils???
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
