not sure which variation of model 70 I have but. is there anyone that sells a replacement on of switch for this?
Second question is that I dont get much volume unless I touch the grid cap of the first tube(it will get much louder if I do. which means there is probably an open coil,..or a bad volume pot
Third question is.....why do I have a double pot volume circuit and the schematic only shows one?

:not sure which variation of model 70 I have but. is there anyone that sells a replacement on of switch for this?
: Second question is that I dont get much volume unless I touch the grid cap of the first tube(it will get much louder if I do. which means there is probably an open coil,..or a bad volume pot
: Third question is.....why do I have a double pot volume circuit and the schematic only shows one?

I take that the 'front' part of the volume control is the actual pot, and the 'back' part is the on-off switch....

There is a cross-reference manual put out by Mallory, that lists the replacement parts for on-off switch assemblies back into the 1920s. You can look up Philco 70 and find the Mallory number, and the part will either be in another radio you can 'salvage' from, or there is a NOS part available online, or at a hamfest...

I think Philco 70s have a 'paddle' switch that's for 'local' or 'long distance' reception, so try that......

I would look for a 'hotter' type 27 (or is it 24?.....) RF Amp tube before I would 'mess' with the volume pot or antenna coil.....

:I actually have the volume control as not having an on off switch built on the back. The volume control has2 adjustable pots on it and thats it. The on off switch is by it self and it looks like a bunch of stacked circuit boards on top of each other, rived together with a copper piece of metal that goes around one side and what looks like it covers the contacts with a bulge on one side.. I tried using contact tv tuner cleaner/lube and was able to get it to have continuity only with the meter but not good enough to conduct juice.

::not sure which variation of model 70 I have but. is there anyone that sells a replacement on of switch for this?
:: Second question is that I dont get much volume unless I touch the grid cap of the first tube(it will get much louder if I do. which means there is probably an open coil,..or a bad volume pot
:: Third question is.....why do I have a double pot volume circuit and the schematic only shows one?
:
:I take that the 'front' part of the volume control is the actual pot, and the 'back' part is the on-off switch....
:
:There is a cross-reference manual put out by Mallory, that lists the replacement parts for on-off switch assemblies back into the 1920s. You can look up Philco 70 and find the Mallory number, and the part will either be in another radio you can 'salvage' from, or there is a NOS part available online, or at a hamfest...
:
:I think Philco 70s have a 'paddle' switch that's for 'local' or 'long distance' reception, so try that......
:
:I would look for a 'hotter' type 27 (or is it 24?.....) RF Amp tube before I would 'mess' with the volume pot or antenna coil.....