1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration

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

Threaded Mode
41-255 Speaker replacement
Eric
Senior Member
****
Posts: 451
Threads: 85
Joined: Nov 2011
City: Cumming, GA
#1

03-15-2020, 02:18 PM
    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
Find
Eric
Senior Member
****
Posts: 451
Threads: 85
Joined: Nov 2011
City: Cumming, GA
#2

03-16-2020, 10:02 AM
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
Find
Eric
Senior Member
****
Posts: 451
Threads: 85
Joined: Nov 2011
City: Cumming, GA
#3

03-16-2020, 02:30 PM
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
Find
radiodale
Member
***
Posts: 93
Threads: 20
Joined: Aug 2014
City: Greenville, TX
#4

04-12-2020, 10:38 PM
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.
Dale


http://www.dalesantiqueradio.com/
Website Find
« Next Oldest | Next Newest »
Thread Closed




Users browsing this thread:
[-]
Recent Posts
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM
The list of my radio & TV collection!
Magical chords of forgotten melodies, old nostalgic music on an old radio... Saturday night blues on the Mid-Waves on an...RadioSvit — 12:20 PM
Philco 42-345 Restoration/Repair
Thank you MrFixr55 the issue with this radio is that the internal coil antenna is missing and there was a wire in its pl...osanders0311 — 11:34 AM
Philco 610B oscillator wiring
Regarding the oscillator circuit which is comprised of the 6A7's cathode, control grid, and screen grid. These elements ...Radioroslyn — 10:33 AM
Philco 42-345 Restoration/Repair
Hi OSanders, First off, welcome to the Philco Phorum where Phine Phamily-Phriendly Pholks Phull of Philco Phacts and P...MrFixr55 — 08:41 AM
Philco 42-345 Restoration/Repair
Today I've been reading through the site trying to learn more about this radio. I also soldered the lose power cord cabl...osanders0311 — 08:24 PM

[-]
Who's Online
There are currently 2405 online users. [Complete List]
» 1 Member(s) | 2404 Guest(s)
Avatar

>
  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration