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

Another Coronado 2cm
#1

I had so much fun on the last 2cm, I picked up another to keep me out of trouble.
Bought a cap kit to re-cap, but noticed some wiring issues that have me wondering.
Noticed wires coming from 1st IF trimmers and 2nd IF trimmers have had a few wires cut and taped on the ends.
Any idea why this would have been jerry rigged?
I could send a pic if needed.
The radio seems to play ok on AM. Have not tried the SW bands.
Would like to figure out the wiring before re-capping.
What do you guy's think?
murf
#2

It could be that they go to the selectivity control (two position switch).

See if your selectivity control has continuity to both IF cans.
#3

Does not appear that way.
Wires were cut and the ends taped.
I think I will pull the chassis out of the other 2CM that I just finished and do a little comparrison.
Thanks
#4

I'll be darned,
TA Forbes, You are a genius.
You are exactly right.
I pulled the chassis from my other 2CM, and the wires in question go to the center 2 position switch.
Must be a sensitivity switch?
I can only assume that the switch was bad, therfore requiring the disconnect.
Should I try to replace the switch, or just leave it alone?
What are the odds that I would find another?
Thanks again for your expert diagnosis TA.
Murf
#5

The switch is easy to replace. It may not be what came in the set, but it will work.

You should verify that all three coils in both IF cans are good. The third coil is the one that is switched into the circuit by your control.

If both cans are OK, I would just get a replacement switch and be done with it.

Finding a replacement IF can for these WG based sets is tough. I have a Truetone D697 that has an open one and have not found a replacement yet......
#6

I don't know if I want to replace the switch now.
Looks there were some wiring mods made and a couple caps removed and others put in different spots.
Might be opening up a can of worms.
I wish people would not jerry rig these old timers like that.
Makes it hard to work on later for the next guy.
I think I will just finish re-capping it and call it good.
Don't really need that function anyway.
Anyone know why Wells Gardner has that metal plate laying under the chassis?
Just sits under there and it looks like it has a ground terminal on it.
Both of my sets have it, and neither one is attached to anything.
Have a great day.
murf




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
An attempt to remove the Field Coil from a G speaker
Mike; I've only run into a speaker with an open filed coil twice, and they were on newer speakers from the 1940s. One ...Arran — 12:48 AM
An attempt to remove the Field Coil from a G speaker
Arran Yes, this is my plan for now and what do I got to lose, this is not even the speaker from this radio, but one o...morzh — 10:44 PM
An attempt to remove the Field Coil from a G speaker
Mike;  I would unwrap the field coil, and see if maybe there a break near one of the ends, like where the coil wire att...Arran — 10:23 PM
An attempt to remove the Field Coil from a G speaker
...and this is what I did. I fed a little LT into the screwholes with a small brush, and a little on the rim next to the...morzh — 09:52 PM
Philco 40-120C Restoration
I combined the two 40-120C threads together as we like to keep the discussion of the same radio together. It helps with...klondike98 — 09:36 PM
Philco 40-120C Weak, Distorted Ouput
Just checked were I buy tubes price is four dollars. So living in Florid we have a local source for tubes. David    David — 09:14 PM
Philco 40-120C Weak, Distorted Ouput
The higher voltage may be due to higher mains voltage. My mains run 120-125AC when the set was new mains would be 110-11...David — 09:09 PM
Philco 40-120C Weak, Distorted Ouput
Thank you for your reply. I pulled a speaker from a Philco 41-221 and received the same result. I used a signal tracer t...bluecap — 08:45 PM
Philco 40-120C Weak, Distorted Ouput
Have you tried a different speaker? How did you trace the distortion? How do you know it is weak? What is the reference?...morzh — 08:33 PM
Philco 46-480 Electronic Restoration
Amen to that! Every time I think I’ve captured them all, I realize that there’s another error. My goal is to finish with...jrblasde — 07:00 PM

[-]
Who's Online
There are currently no members online.

>