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

41-255 Speaker replacement
#1

    Hello it's been a while!
I have a Philco 41-255 schematic here.
http://www.nostalgiaair.org/pagesbymodel...013408.pdf

The speaker FC coil is open so I'm faced with putting in a PM speaker. The coil is rated for 1100 Ohms and I have a 1000 ohm 20 watt ceramic resistor. I believe I have figured it out but not sure. I'm posting a hook up picture. Don't want to power it up till someone takes a look at it. I have not totally recapped it yet just the filter caps and increased their value. Checked the tubes and there good. Any opinions?
Thanks Eric
#2

Ok my MESS up. 
Had it hooked up wrong Field Coil should have been A & D and voice coil should B & C.
Now for the rest of the recap. Also good news the wiring is in good shape and if I'm careful and not disturb to much this should by an ok restoration.

Amazing what an overnight brain rest will do!

Eric
#3

I've recapped the radio and it plays well and even though I increased the value of the Filter caps from 12uf & 16uf to both @ 22uf I'm still getting Hum from the PM speaker. Increase the values to 33uf? Any Thoughts?
Eric
#4

You can make the output cap as large as you want but increasing the input cap too much puts a bigger load on the rectifier.




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 91 Speaker Replacement
The spider is glued on the cone and so is the voice coil. I think you can use a cotton swab dipped in acetone and carefu...RodB — 02:42 PM
Restoring Philco 37-604C
Yes I saw that. If I knew, I'd probably try to arrange for getting it myself. But I have just got one. Which does not m...morzh — 01:44 PM
Philco 38-2 Automatic Tuning
When you push the lever, you are supposed to rotate the disk to the desired station. Then the magnetic tuning will acqu...morzh — 01:42 PM
Philco 38-2 Automatic Tuning
I figure out the muting from another picture that helped. Now I need to know how the automatic tuning works. When I push...dconant — 12:11 PM
Philco 91 Speaker Replacement
How would I go about removing the spider from the cone?dconant — 12:04 PM
Philco 38-2 Automatic Tuning
Hello, I am having trouble getting my automatic tuning to stay unmuted. If I play with the tuning handle I can get it to...dconant — 10:51 AM
Does anyone make photofinish replacements?
Here’s the link to the DIY photofinish section of our site: klondike98 — 09:46 AM
Delco car radio Peko vibrator converstion issues
Hi Richard, Thx for posting the schematic.  As I remember as a kid, these were great performers for the time, likely...MrFixr55 — 08:56 AM
Delco car radio Peko vibrator converstion issues
hello mr Fixr, The Electro  Powersupply that I am powering the radio with has a huge choke plus a 10,000ufd electrolyti...radiorich — 10:58 PM
Delco car radio Peko vibrator converstion issues
How about putting a choke in the power supply? The big cap was likely an attempt to stabilize the DC. Kids who cre...MrFixr55 — 09:19 PM

[-]
Who's Online
There are currently 3318 online users. [Complete List]
» 2 Member(s) | 3316 Guest(s)
AvatarAvatar

>