[Ronin61]

I've had this model 87 for quite a while and i figured i should get started on the chassis. I also have another one that belongs to a customer so i think i will  do them back to back. both cabinets are in very good shape so a little cleanup will be all that is needed. Underside of the chassis looks untouched .

[Image: http://i1281.photobucket.com/albums/a508...4f8f95.jpg]
The chassis for the customer looks all original except for the 127 tube .    Went to nostalgiair.org and found the schematic so in a couple of days i'll get started. I have i believe done a model 112 that has that big square box with all the caps inside so i ain't scared . If anyone has any suggestions or tips on this model please send them my way.    [Image: http://i1281.photobucket.com/albums/a508...bxwdwt.jpg]                                                            [Image: http://i1281.photobucket.com/albums/a508...q1hvgp.jpg]

[gregb]

Really nice condition, good luck with your resto!

Gregb

[Radioroslyn]

As for tips, use mylars for the filters ecaps will short after awhile. Check the primaries of the rf coils, have seen a number of them open. I think about 50t of 38g is what I used. It's not real critical as the secondary is the tuned part of the circuit.
This is one I did about 5yrs ago
http://philcoradio.com/phorum/showthread.php?tid=3490
Take your time!


Have Fun!!
Terry
ps. Looks like your grid return lead for the 45's isn't connected

[morzh]

Two things:

I did 111 which is a sister superhet (this one is a TRF), same type chassis.

1. I had interstage xfmr open.
2. This fat cable, it gets really brittle. Unless you want to replace it, do not manhandle it.

[Radioroslyn]

Hey Mike,
> I had interstage xfmr open.
Was the core 1/2"?

Terry

[Ronin61]

This s part of the schematic showing the cap box, showing three 2mfd caps, one 1mfd cap, and two .1mfd caps, and one .15mfd cap, does anyone see anything i might have missed. they will be replaced with mylar caps. i will  check the primaries. thanks everyone keep it coming.

[Image: http://i1281.photobucket.com/albums/a508...wfr98.jpeg]

[KCMike]

Hi Ron. Looks like there might be another one, .015 on the schematic listed as 31 just above the on off switch.
Good luck with restoration.

[morzh]

Terry


Likely. I had it shown in my 111 topic. I used Hammond instead, put it in the org clamshell, so it is fine.
It also had field coil open.

[Ronin61]

Thanks Mike I located that cap on the schematic , replaced the power cord and did all my testing today. Everything checked good so I replaced the 80 tube and powered it up for a little test. Used a two foot antenna wire and picked up many local stations. Now it time to order the caps I need and dig deep it the cap box. Here's a picture of the radio under power. [Image: http://i1281.photobucket.com/albums/a508...addvys.jpg]

[morzh]

Great.
Oh forgot to mention: the volume pot was fully open. That is it has the scale which is a cardboard covered with graphite, with a wheel for the wiper, and though there was no mechanical damage, the graphite was all but gone.

A big beautiful pot. Found a suitable replacement.

[Ronin61]

Caps arrived yesterday so i pulled the box today and got started on making a mess in my garage. I took the bottom off very carefully and cut the wires. Then i applied the heat and well here are some pictures of the process.

[Image: http://i1281.photobucket.com/albums/a508...slm5cj.jpg]

[Image: http://i1281.photobucket.com/albums/a508...wpjugp.jpg]

[Image: http://i1281.photobucket.com/albums/a508...134njm.jpg]

[Image: http://i1281.photobucket.com/albums/a508...2lrpv5.jpg]

[Image: http://i1281.photobucket.com/albums/a508...g4trtd.jpg]

[Image: http://i1281.photobucket.com/albums/a508...mkpggc.jpg]

Next comes the easy part , cap replacement and the reassembling the box.

[morzh]

Yep...went through that several times. Putting caps in is indeed the easy and enjoyable part.

[Radioroslyn]

Here's a video of your set being built. https://www.youtube.com/watch?v=kanPsUDyKrU
You may have seen it as it's made the phorums a number of times.
I'll mention a few things about it. The opening at :58 was "borrowed" from a radio series called Behind The Mike. Circa 1939-40. Good series for learning radio show production and enjoyable to listen to.
If you want to cut to the chase you can start the chassis being made at 10:32 and what you just got though ripping out at 12:00. Later on comes the cabinet. Wow they spray the lacquer heavy.
Sure looks like an 87 chassis!

Enjoy if you haven't seen it before.
Terry

[Ronin61]

Here is my drawing of cap mounting points 1 thru 10 , 10 being ground. the way i see it the points are in a diagonal pattern. any see it any different.

[Image: http://i1281.photobucket.com/albums/a508...bbjiod.jpg]

[Image: http://i1281.photobucket.com/albums/a508...2oy5ro.jpg]

Question, are there any resistors in this box. i didn't see any. comments please.

[Radioroslyn]

Pretty sure there aren't. The only ones I remember are under the chassis by the RF coils. They look like paper cap mounted on a metal bracket. Those have a resistor inside. There's 3 of them.

Terry