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Philco 024 Signal Generator - Printable Version

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Philco 024 Signal Generator - marty - 09-28-2013

Hi All;
I have the Philco 024 Signal Generator, and I have ordered the Papers (Documents) from Chuck for it and they are a week or more away..
But, in the mean time can anyone tell me if there are three power wires or four power wires ?? As near as I can tell I have three wires that I assume are for power, but it could be missing a wire.. Two (I think) of what I have are for the filament one going thru the switch which is missing and I have put in.. The other one of the three is for the +90 Volts, its -side of the 90 volts that I am not sure of.. Does it go to one of the filament wires which would make it a three wire setup, Or does it go to Ground which I would then have a four wire setup and I am missing that wire..
THANK YOU Marty

RE: Philco 024 Signal Generator - Radioroslyn - 09-28-2013

I would suspect that one wire is for +90v, one wire is for +2v and the third is for the -90v and -2v together. But relax and the diagram will be there before you know it or damage something by applying the wrong voltage to the wrong wire.
Terry

RE: Philco 024 Signal Generator - marty - 09-28-2013

Hi All;
Radioroslyn, I already know what you have stated, and that was or is why I asked about the correct wiring.. I just thought maybe someone would have the answer before the papers get here.. Patience is not one of my traits.. I hate waiting..
THANK YOU Marty

RE: Philco 024 Signal Generator - Radioroslyn - 09-28-2013

Ok well tell me where each of the wires connect.
Terry

RE: Philco 024 Signal Generator - marty - 09-28-2013

Hi All;
That is the 64 thousand dollar question.. I am pretty sure that the Green Stripped wire goes to +90 volts.. And the white wire goes to the + side of the filament voltage (+2.0 volts) and the green wire thru the switch goes to the - side of the filament.. But, the real question is does the -90 volt side go to the - side of the filament as you said, or to ground since there is a tab there next to the switch.. And as you have said I don't want to burn anything up.. I can use a lower voltage for testing purposes, but confirmation would be a better way to go.. I have a partial schematic drawn out..
THANK YOU Marty

RE: Philco 024 Signal Generator - Jamie - 09-28-2013

Marty, go lock that signal generator in the trunk of your car.. and don't get it out until the schematic arrives.. Icon_lol

If you mess it up, you'll be kicking yourself in the rear..

RE: Philco 024 Signal Generator - Warren - 09-28-2013

Yes, Just guessing and experimenting will probably only get you in trouble. If there are schematics on the way I wouldnt touch any wireing until you get that..If you can't wait, clean it all up cosmeticaly until you recieve the papers.

RE: Philco 024 Signal Generator - marty - 09-29-2013

Hi All;
Besides drawing out the Schematic, I have also put knobs on the Outside.. Probably not correct, but at least I have something on there.. I have also put in a switch from another old meter that was parts and so the switch looks Origional.. So, I have been bidding my time doing what I can..
THANK YOU Marty

RE: Philco 024 Signal Generator - marty - 10-07-2013

Hi All;
I got the Schematic from Chuck, THANK YOU Chuck !!
And the Biggest Suprise is that the B+ Voltage was not 90 Volts, but 22 and 1/2 Volts, I don't know where I had heard that it was 90 Volts.. But, now I have the Schematic.. I need to get some Battery Holders from Radio Shack, on a single "D" for the filament and for starters 3 nine volt holders, once it is working I will add another three holders for longer life (Series-Parallel).. 27 volts..
THANK YOU Marty

RE: Philco 024 Signal Generator - Chuck Schwark - 12-01-2013

Glad to help. Post some pics of the innards.

Chassis underside, rear of chassis outside the cabinet, etc.

Chuck

RE: Philco 024 Signal Generator - Tonytiger75 - 05-13-2019

Yes the normal plate voltage for a #30 tube is 90 to 180 volts but for some applications 45 volts is listed in the RCA data sheet and in the 024 it uses 22-1/2