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

118X electrical overhaul
#16

As long as the IF transformer coils are not open or shorted, don't worry about the wax. I have a 118 and my IF's look the same as yours.

That additional electrolytic was added by a repairman and is not original or on the schematic. It was probably installed to reduce hum because the original filter caps were failing. 

I used a larger value replacement electrolytic after the choke, 22 uF (73)  to reduce background hum somewhat. Don't use more than 10 uf for cap (74) or you will increase the B+ voltage above spec. This cap should have a high ripple current rating as it is a bit stressed. I used a 10 uf 630v Polypropylene film in my radio to avoid problems.
#17

RF coils dripping wax is common thing I see, not necessarily something to fret about. Could be just warm enough under there that some wax ran.
Coils, if not open, same as mica caps, innocent till proven guilty.

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.
#18

So this project hasn't died out yet, and I'm in the middle of recapping the unit. (life has been busy!)

In regards to replacing a Multi-Can Capacitor...

If there are 2 or more leads on a single terminal, say 3 leads going to a 1uF terminal, can you split up the leads and give them each there own 1uF capacitor? One of the current leads comes all the way across the chassis, and I have a good place to put an individual 1uF cap.

I can't see this causing any harm, and I would think they did this just to lower the parts count.

Thanks!
#19

There might be the need for all three to be together and then de-copuled with 1uF cap, so, likely no, if there were three leads on the same cap, I would keep it this way.

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: 1 Guest(s)
[-]
Recent Posts
philco predicta
I found that where I have the 140v B+ there is 50v and the tuner receives 235v through the orange cablecgl18 — 04:14 PM
Philco 91 code 221
Chassis grounds thru rivets is another good place to look. Oh and the stator screws on the tuning cap where the leads at...Radioroslyn — 08:11 AM
Philco 91 code 221
Dirty tube pins and socket, cold solder joint, stray tiny strand of wire, clean the entire area around the oscillator tu...RodB — 08:43 PM
Philco 91 code 221
I have been restoring one of these sets and switched it on yesterday. It didn't exactly spring into life, but after a co...Philconut — 08:26 PM
Philco 50-925 antenna connections
That's super. Glad to hear you figured it out. Paul.Paul Philco322 — 11:11 AM
Philco 50-925 antenna connections
Hello Keith, great news !! Sincerely Richardradiorich — 02:14 AM
Philco 50-925 antenna connections
Finally, got the antenna fixed (repaired some broken wires) and have the radio playing. I've got four different schemat...keith49vj3 — 09:38 PM
1949 Motorola 5A9M
Bob, Nice radio.  I’ve not seen one before.  Keep us updated!Joe Rossi — 07:56 PM
Phioco 90 Power Transformer Wire Colors
Thanks for adding that information.klondike98 — 06:09 PM
Phioco 90 Power Transformer Wire Colors
Although I have used this site as a resource for a number of years this is my first post.   I am restoring a Model 90 si...vincer — 05:02 PM

[-]
Who's Online
There are currently 1489 online users. [Complete List]
» 2 Member(s) | 1487 Guest(s)
AvatarAvatar

>