1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Threaded Mode
41-255 Speaker replacement
Eric
Senior Member
****
Posts: 450
Threads: 84
Joined: Nov 2011
City: Cumming, GA
#1

03-15-2020, 01:18 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: 450
Threads: 84
Joined: Nov 2011
City: Cumming, GA
#2

03-16-2020, 09:02 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: 450
Threads: 84
Joined: Nov 2011
City: Cumming, GA
#3

03-16-2020, 01:30 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, 09:38 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 »




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
PT-6 antenna connections
Hi, reading your explanation I can see the confusion. If you take it one connection at a time it should result in a desi...RodB — 06:34 PM
Cannot Adjust an IF Transformer’s cores
It works! I received the PCBs this morning in the mail, and put everything together. I reused the base from the original...jrblasde — 04:32 PM
PT-6 antenna connections
I seem to have lost my way on this PT-6. I see the antenna aerial transformer schematic - I’m reading pins 1 through ...bridkarl — 12:30 PM
40-150 General questions
Good thing you're a good electrician ... the pictures show a lot of rewiring in your future! Take care and BE HEALTHY!...GarySP — 11:52 AM
40-150 General questions
I think RobB has it right. It is a part number and looks like its stamped on the chassis and that wasn't something you ...klondike98 — 11:41 AM
40-150 General questions
It's most likely a part number. Most of Philco part numbers are in that format. I looked at the parts list for this mode...RodB — 08:10 AM
40-150 General questions
Hi Kevin, No, I don't but I like your Quote about being a good electrician. The way I look at it is "The fact ...MrFixr55 — 08:06 AM
Philco 38-7 Speaker
7K should be fine. While not a perfect match (This transformer is meant for 6V6 tubes), Antique Electronic Supply (AES)...MrFixr55 — 08:03 AM
40-150 General questions
I discovered a stamp on the underside of the breadboard on my Philco 40-150. It is"56-1417' in black ink with numbe...Kevin_D — 07:14 AM
Philco 38-7 Speaker
FYI the Impedance of the HR20 (the one I have) secondary of the audio transformer is 5 ohms. The 38-7XX speaker is suppo...tludka — 04:22 PM

[-]
Who's Online
There are currently 2808 online users. [Complete List]
» 3 Member(s) | 2805 Guest(s)
AvatarAvatarAvatar

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