"Band switch should not be stiff. pretty simple if all the parts are there. Lubrication issue? "
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I have questions about my 7-knob BOL Philly with Robot Control
Started this discussion. Last reply by David C. Poland 5 hours ago. 45 Replies 0 Likes
I am starting this discussion because I have questions about my Philharmonic as I embark on a quest to restore it to optimum performance.I have included pics of the dial and knobs. Other than what I…Continue
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"As I am going through the controls on the front of the receiver chassis, I notice my wave range switch (band selector) front bearing plate has been jacked with probably due to it's stiff nature. After a thorough cleaning, minor straightening of…"
"Thanks, Scott. I accepted your friend request."
"I sent you a friend request. "
"Scott, your schematic is beautiful! Do you have the entire power supply/amplifier unit schematic available? Any parts list for same? Thank you."
"The later amps all had the 4 pin socket. You can tell the later amps by the 3 filter capacitors in a row, whereas the early amps had 4 that are in a diamond pattern. What Norman said, 2 of those pins are for the ON/OFF switch, and the other…"
"Thank you. "
"I note the 3 topside filter caps are replacements. They appear post war and maybe new enough to still be decent.
The originals were taller and different construction."
"Good that you do have the properly configured amp. Agree with Norman.
As per the amp diagram for the FM combination Philly - The wiring for the "Robot control" for your receiver: the 2 smaller socket holes #1 & #4…"
"Going from a foggy recollection you will just need to add the 24-volt control transformer inside the power amplifier and run the two 24-volt wires to the two unused lugs on the four pin socket. The primary of the control transformer connects…"
"David, I misunderstood the third socket/cable. I do have the configuration you are describing with two separate cables that run from the receiver and plug into the amp chassis via the plugs you are describing. My amp has the same holes as the one in…"
"To clarify the amp configuration - one amp 7 pin socket is for the speaker. 2nd socket is also 7 pin for the main receiver cable. (the pin diameters pin sizes vary to prevent a mix up.) And for a remote control model, a 3rd socket is 4 pin for…"
"David,
This could explain why nothing happened when I tried the remote. There was no light and no indication of
of any of its functions were working. I have no 24volt transformer mounted midship under the amplifier chassis and no third…"
"Bob - there is a chart of B and C divider information in Riders Volume 14, under Scott - page 14-55.
Also receiver resistance info starts page top of page 14-54. Note that your radio would probably be the "early" figures, in as a much as…"
"Bob - the 5U4 rectifiers suggest you may have a later substituted amp for your 7 knob early BOL Philly.Philharmonic.
The May 1939 diagram for the 9 knob Philly still shows the 5Z3 tube. The 5U4 is pretty much an octal based 5Z3 so is fine. The…"
"Full Disclosure regarding Philharmonic B+ divider resistors... There were two versions. The early divider was 2200-430-420-1200 ohms for a total of 4250 ohms. The late divider was 2200-430-420-1700 ohms for a total of 4750…"
Getting started on my Philharmonic
Is Kent King still keeping track of serial numbers? He may have mine since I obtained it from fellow collector Alex Whitaker. Where could I find the best service info for my Philharmonic BOL non-logging scale dial ? It has a remote with motorized tuning and what I believe may be motorized volume? Anyhow, thanks for letting me join a few years ago and am looking forward to getting reacquainted with the hobby since I have been adjusting to retirement.
Comment Wall (2 comments)
- At 10:28am on January 25, 2026,
David C. Poland said…
Bob, I expect your Philly with remote control would indeed have the motorized volume control. and that the location of the bass and volume control are swapped to accommodate the motor and gears for the volume control.
What cabinet do you have?
The Archive Info (top of page) would take you to the set folders where you will find Philharmonic folder. In addition to owners manual, there is a separate item for ROBOT control with specifics for your remote control option radio.
.
- At 8:37pm on November 2, 2022,
Hey Bob, Welcome.
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