Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Update on Model 87 restoration
#1

First, I want to thank you guys for the help and information that you have given me. I wanted to give you an update on my progress on restoring my Model 87.

I took your advice and decided to mount the capacitors in the can. I removed the can and used a butane torch to melt and remove the tar. I was careful not to get the flame too close and distort the can. It took forever for enough of the tar to melt and drip out enough for me to remove everything from the can. I cleaned the inside of the can with tar remover and alcohol until I got it completely clean.

Rather than strapping the wad of new caps together, I cut a piece of 1/4 inch plywood to lay them out on, sort of like a circuit board. I cut a piece of sheet metal to use as a terminal strip and screwed it down to the board, and soldered each cap's negative end to the strip, as well a wire to route to the chassis ground. The plywood fits perfectly into the can, and I put a thick piece of foam into the can to fill the space so that the board won't move around. I have reattached to can to the chassis and rewired all 10 of the leads. Double and triple checked correct wiring and solder joints.

I have ordered replacements for the 3 tubes that were missing (2 45s and an 80), so that's where I am now. If all goes well, I'll be listening to this thing in a couple of weeks.

Again, thanks for all of you advice and help.

Wendell
#2

Great! Sounds like you're off to a good start. While you wait if you've got three .1mfd 350v or better I'd repair the plate bypass caps for the 26's. Just break the ground connection where the wire is solder to the mounting bracket and solder in the new one from the solder lug to the bracket(ground connect).

Also take flashlight and look down into the rf coils. What you are looking for is loose wire coming from the coil. If you happen to see some you will have to rewind that open section. Usually it's the primary winding which is about 30 turns of small gauge magnet wire like 32-38G enamel covered. Number of turns isn't real critical as it is for coupling not the tuned circuit.

I'm listening to mine as I type. Tuned up on WNAR Crime Club is on now but later one of my favorites, Jack Benny and Amos & Andy will be on.

Have Fun!!!
Terry

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry




Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
The speaker table error?
G  10-1/2"       65, 76, 87, 95 Push-Pull 45's 2766 0.7 550 3200 H   10-1/2"    77, 96 Push-Pull...morzh — 09:26 PM
A Marconi model 86
I have a Stromberg, one of the early ones, seems early 30s. This is what I call a back breaker. None of the early Philc...morzh — 08:28 PM
A Marconi model 86
A backbreaker.....PaulPaul Philco322 — 08:12 PM
A Marconi model 86
>>What a behemoth! A Juggernaut.morzh — 07:47 PM
Philco 70 antenna lead
I am not sure I understood about the coils and the mush. I looked an more than one coil in 20, 70, 90, 60, Zeniths and ...morzh — 07:46 PM
A Marconi model 86
:e_biggrin: What a behemoth!  I hope the final result is as much a quality sounding example!  Keep us posted on your pro...GarySP — 07:32 PM
A Marconi model 86
I should add that the double conversion may only be used on the shortwave bands, but I haven't looked at the schematic t...Arran — 07:27 PM
Philco 70 antenna lead
Yes, that wire will not pick up much interference as routed - the RF at that level won't be affected, and if you have st...radio1 — 07:26 PM
Philco model 60
I'm also a member of MARC. Did you attend the Vintage Electronics Expo in Waterford, MI last month? That's where I got...GarySP — 07:22 PM
A Marconi model 86
Dan Double conversion is using two IF converters instead of one. This improves the image response. morzh — 07:15 PM

[-]
Who's Online
There are currently 6087 online users. [Complete List]
» 1 Member(s) | 6086 Guest(s)
Avatar

>