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Philco 116 - Printable Version

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Philco 116 - chucka - 06-30-2021

I'm working on a Model 116 and need to remove the 1st IF can to replace the bad grid wire. It looks like all
three cans are physically connected together and I can't see any easy way to get them off the chassis.

Anyone have this problem before and have a solution?


Thanks

Chuck

RE: Philco 116 - Radioroslyn - 06-30-2021

All three come off as one unit as they are welded together. Unscrew the two screws per can on top. On the bottom there are two per can squeeze fasteners. Get all that loose and the cans jump right off!

GL

RE: Philco 116 - chucka - 06-30-2021

Thanks

I figured that was the way, but just wanted verification


Chuck

RE: Philco 116 - Radioroslyn - 06-30-2021

Philco did make a tool to release those clips, p/n 45-2146 listed in the '38 parts catalog.
Older sets used sheet metal screws to mount the base of the coil covers down.
I think you could use a small deep well socket maybe 3/16" on a straight handle. If you press that over the end of the clip to compress it enough to release. Would use something like some nickles and masking tape to slip under the edge the can and tape the nickle to the chassis so it won't re-clip it self.
I did it with pliers but it was pretty frustrating and ended up breaking some of the clips.

Great set! Is it a X or a B?

Good Luck!

RE: Philco 116 - chucka - 07-01-2021

I'm guessing it's a B, no identifying labels on the chassis my customer just gave me the chassis and speaker to restore.

I was looking for a schematic that matches the wiring on this chassis. This one has the later(?) detector circuit and volume control
and has the second AVC line to control the suppressor grids of the RF and 1st IF tube, but they also connect to a
fixed -2.4V tap on the divider resistor. Was this another change in the design? I removed the fixed -2.4V connection and the sensitivity got
better (recovers good audio down to 5uV @ 18MHz) and appears to help quite a bit on very high RF inputs, tested up to 5,000uV.


Chuck

RE: Philco 116 - Radioroslyn - 07-01-2021

There's 2 versions of the 116B an early and late. Early uses a 10 1/2" spkr the late an 8'' spkr. The 116X uses the same chassis but instead of the p/p 42's it uses p/p 6A3's, bigger pt and rectifier tube. Spkr is 14" or so.

The 116B is aka the code 121. Didn't  disistinguish between early and late. And the 116X is aka code 122. The only service revisions I could find were in the Riders, Philco lists a bulletin #222 but we don't have it in the library. Pretty sure the rf,IF and det stages are the same between the two sets just audio stages and p/s are the difference.

5uv @ 18MC sounds good for this old guy! Any of the 16's or 116's are great players! When rebuilt properly.