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

restoring capacitor tar block
#1

This is my first time restoring a capacitor tar block on a radio.  This is the metal box with 5 film capacitors, not the bakelite block.  I've got it apart and plan on reusing the original wires that come out.  I don't have circuit board material on hand, but I'm planning on cobbling up some cardboard and perforate holes to secure the capacitors.  What I'd like to know is what different concepts people used to secure the new capacitors in the metal box, maybe better ideas than what I have in mind.  The radio is a Philco Model 60.
#2

I don't remember any tar block caps in 60.
There is a gang cap can with 5 caps but it is not a tar block. Caps are tared tobether but not to the can.

You simply open the tabs, take the cardboard front off and pull the envelope of the tarred caps wrapped in fish paper out.

I simply solder the caps together at the GND, wire the leads, abd then pot the leads with hot glue after threading them through the cardboard front's holes if existing. The fishpaper serves as the insulator from the can.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#3

Here's a couple pictures of my restuff of the box for a 60MB. I didn't take as many photos as I should to show what I did. I did not reuse the original wires and simply bundled the film caps together with some electrical tape after soldering the ground side of all caps together and running a wire up the side to be soldered to the side of the box. A little heat shrink covered any exposed wires on the positive side of each cap and then all leads went out through the original black fiberboard cover and the box tabs were folded down to make it all snug. The cardboard lining gave enough for the black fiberboard to seat onto.
#4

One note: I'm not sure cardboard is a proper thing as it might absorb moisture.
But the idea is the same .

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
#5

(12-28-2017, 05:37 PM)morzh Wrote:  One note: I'm not sure cardboard is a proper thing as it might absorb moisture.

Good point Mike
#6

This is how I restuffed my tar block.  After this picture I trimmed away some cardboard and wire before stuffing it into the old can.


Attached Files Image(s)
   
#7

Icon_thumbup
#8

When I rebuild a can like that, I reuse the original front and back insulators, the original fish paper, original lead wires if they do not have damaged insulation, and I twist the common leads together and solder with the original bare wire that is soldered to the can. Sometimes I inject some hot glue to hold the capacitors together but some electrical tape would do just as well.

--
Ron Ramirez
Ferdinand IN
#9

Ron

Almost exactly the way I do it. I make point of reusing the fishpaper and front/back.
I mostly use the GND lead wire.
I do not always re-use the connecting wires as sometimes they are tarred too much.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.




Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
A Marconi model 86
Yeah. I am dreading the thought of what to do with all my consoles when I will no longer be able to move them around. I...morzh — 02:51 PM
1947 Silvertone 7086 Wire Recorder/Phono/Radio on YouTube
Cool gadget, Buzz. I took me a couple of second to undestand that that oscillating thing makes the wire to spool correc...morzh — 02:50 PM
A Marconi model 86
My back hurts already, you could build a house with all the wood. PaulPaul Philco322 — 02:49 PM
1947 Silvertone 7086 Wire Recorder/Phono/Radio on YouTube
Part 4 of this series now uploaded link below to anyone interested Buzz — 02:39 PM
Philco model 60
Welcome to the Phorum, Radios1340!  The oscillator coil on the 60 is a common culprit.  I just bought a 60B (June 1934) ...GarySP — 02:33 PM
Philco model 60
Yes, standard alignment procedure. I can get the minuscule tone to vary when adjusting the trimmers. But you almost have...Radios1340 — 01:40 PM
A Marconi model 86
An imposing-looking radio, for sure.morzh — 12:43 PM
Philco model 60
Model 60 struck again :lol: Welcome to the Phorum! Above is the article on Model 60. Could be of some use. Now...morzh — 12:38 PM
A Marconi model 86
Ooh, very nice!jrblasde — 12:19 PM
A Marconi model 86
I am picking up this radio today. The seller tells me it is all there and working.including the tuning eye. It has 13 tu...Dan Walker — 12:07 PM

[-]
Who's Online
There are currently 7688 online users. [Complete List]
» 2 Member(s) | 7686 Guest(s)
AvatarAvatar

>