First, touch your finger to the grid connector on top of the 6A8 det/oscillator tube. If volume increases, then there is a problem in the antenna ckt ahead of that tube.
Check all voltages, particularly plate voltages. Voltages aren't shown on the schematic, but you can guestimate the proper plate voltages by referring to tube data.
Tune to a weak BC station, and touch up the adjustments on the IF transformers, two per xfmr, for maximum volume.
You mentioned only picking up the strongest local station. Does the tuner act somewhat like a volume control rather than changing stations? If so the oscillator may not be operating.
http://www.nostalgiaair.org/PagesByModel/262/M0013262.pdf
If that's the case check continuity of the oscillator coil, #5 and #6. Coils are sometimes open in Philco radios. Might see a green spot on the coil?
Norm
:I finally got my old Philco to play! Many thanks to Warron, Clifton, Lou and others who have helped me along the way. One other issue I have noticed is that the broadcast band will only pick up the strongest local station. I dont think its a location issue or antenna problem or interference with electrical stuff. Would anyone know of any other reasons why my radio wont pick up broadcast band stations? Thanks
:Richard
:
Is grid #1 (pin #5) on the 6A8 tube several volts negative? It should be when the oscillator operates.
Oscillator may still be a problem unless things are way out of alignment? The oscillator coil winding for broadcast band has many more fine turns of wire than shortwave. Broadcast band coil section can be open and shortwave still operates. Be sure coil resistance readings are low, less than 10 ohms.
Norm
::Hi Richard
::
:: You mentioned only picking up the strongest local station. Does the tuner act somewhat like a volume control rather than changing stations? If so the oscillator may not be operating.
::
::http://www.nostalgiaair.org/PagesByModel/262/M0013262.pdf
::Thanks Norm. No the tuner doesnt appear to act like a volume control.Both 5 and 6 osc.cois showed continuity. The short wave mode of the radio picks up numberous stations yet the am band will only pick up the strongest local station.
:: If that's the case check continuity of the oscillator coil, #5 and #6. Coils are sometimes open in Philco radios. Might see a green spot on the coil?
::
::Norm
::
:::I finally got my old Philco to play! Many thanks to Warron, Clifton, Lou and others who have helped me along the way. One other issue I have noticed is that the broadcast band will only pick up the strongest local station. I dont think its a location issue or antenna problem or interference with electrical stuff. Would anyone know of any other reasons why my radio wont pick up broadcast band stations? Thanks
:::Richard
:::
::
::
:
:
Minus 30 volts is more than enough. The oscillator operates.
You don't have much circuitry that isn't used for both broadcast and shortwave. Any chance the band switch isn't operating properly?
Norm
::Richard
::
:: Is grid #1 (pin #5) on the 6A8 tube several volts negative? It should be when the oscillator operates.
::
:: Oscillator may still be a problem unless things are way out of alignment? The oscillator coil winding for broadcast band has many more fine turns of wire than shortwave. Broadcast band coil section can be open and shortwave still operates. Be sure coil resistance readings are low, less than 10 ohms.
::
::Norm
::
::
::
::::Hi Richard
::::
:::: You mentioned only picking up the strongest local station. Does the tuner act somewhat like a volume control rather than changing stations? If so the oscillator may not be operating.
::::
::::http://www.nostalgiaair.org/PagesByModel/262/M0013262.pdf
::::Thanks Norm. No the tuner doesnt appear to act like a volume control.Both 5 and 6 osc.cois showed continuity. The short wave mode of the radio picks up numberous stations yet the am band will only pick up the strongest local station.
:::: If that's the case check continuity of the oscillator coil, #5 and #6. Coils are sometimes open in Philco radios. Might see a green spot on the coil?
::::
::::Norm
::::
:::::I finally got my old Philco to play! Many thanks to Warron, Clifton, Lou and others who have helped me along the way. One other issue I have noticed is that the broadcast band will only pick up the strongest local station. I dont think its a location issue or antenna problem or interference with electrical stuff. Would anyone know of any other reasons why my radio wont pick up broadcast band stations? Thanks
:::::Richard
:::::
::::Hi Norm. Pin5 is around -30vdc with 115 volts coming from my variac. Is this ok?
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