1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)

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

Linear Mode
Speaker replacement question
Chas
Senior Member
****
Posts: 714
Threads: 9
Joined: Apr 2018
City: S. Dartmouth State, Province, Country: MA
#2

11-30-2022, 07:08 PM
The PM speaker will require a power resistor to substitute for the field coil. The OEM speaker is also equipped with a hum bucking coil, to use a PM an additional 20% in capacity should be added to the "filter output condenser". Same OEM field coil speaker also has the output transformer for the'42's. Even with a PM speaker the output transformer is required.

You may find the info here helpful to determine the correct output transformer...

http://www.radioremembered.org/outimp.htm

Might also want to check the Push/Pull input transformer that feeds the '42's. That, could have an open winding too.

GL

Chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
(This post was last modified: 11-30-2022, 07:14 PM by Chas.)
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
Speaker replacement question - by bobclausen - 11-30-2022, 04:15 PM
RE: Speaker replacement question - by Chas - 11-30-2022, 07:08 PM
RE: Speaker replacement question - by morzh - 11-30-2022, 09:20 PM
RE: Speaker replacement question - by bobclausen - 11-30-2022, 09:39 PM
Bobclausen - by bobclausen - 11-30-2022, 09:50 PM
RE: Speaker replacement question - by morzh - 11-30-2022, 10:30 PM
RE: Speaker replacement question - by Chas - 12-01-2022, 02:36 PM
RE: Speaker replacement question - by bobclausen - 12-01-2022, 07:04 PM
RE: Speaker replacement question - by MrFixr55 - 12-07-2022, 09:27 AM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
PT 6 chassis screws size???
Have this done except for missing chassis screws. It looks like 1 inch 6/32 sheet metal screw may work but can anyone s...bridkarl — 10:32 PM
Philco model 38 code 121 not receiving signal.
Hello Stormlord, Well done on rewinding that coil it turned fairly good for your first one. Sincerely Richardradiorich — 09:12 PM
Philco model 38 code 121 not receiving signal.
Well here it is. It ain't pretty, but hopefully it'll work. I checked it with my DMM on continuity and it keeps and r...Stormlord5500 — 08:56 PM
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM
Philco model 38 code 121 not receiving signal.
Well why not! :lol:Stormlord5500 — 03:14 PM

[-]
Who's Online
There are currently 971 online users. [Complete List]
» 2 Member(s) | 969 Guest(s)
AvatarAvatar

>
  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)