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

650B tone control values
#1

Guys, I want to replace the caps inside my tone control. The part number from the schematic is a #30-4343. I don't see this one listed on Chucks site. I assume points 1 2 3 & 4 are as follows. 1 = open, point 2 is the first position back to the cap and so on for points 3 & 4? Thanks.

-Brian
If you collect or are interested in antique telephones, please visit Classic Rotary Phones
http://www.classicrotaryphones.com/forum/index.php
#2

I found it listed in the schematic as .01 .003 and .01 in that order. All listed under part #57. Am I correct?
http://www.nostalgiaair.org/PagesByModel...013824.pdf

-Brian
If you collect or are interested in antique telephones, please visit Classic Rotary Phones
http://www.classicrotaryphones.com/forum/index.php
#3

Yes, those are the correct values.

Point 1 - none of the caps are in the circuit.
Point 2 - shorts out the first .01 uF cap, reducing or eliminating bass.
Point 3 - brings the .003 uF into the circuit, leaving the first .01 shorted and adding just enough bass to make the sound mellow without reducing treble by any appreciable amount.
Point 4 - puts the second .01 in parallel with the .003, leaving the first .01 shorted; produces lots of bass, cuts treble significantly.

--
Ron Ramirez
Ferdinand IN
#4

Thanks Ron Icon_wink

-Brian
If you collect or are interested in antique telephones, please visit Classic Rotary Phones
http://www.classicrotaryphones.com/forum/index.php
#5

Fixed! Much better!! Icon_wink

-Brian
If you collect or are interested in antique telephones, please visit Classic Rotary Phones
http://www.classicrotaryphones.com/forum/index.php




Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco 91 Tuning Condenser
I thought you meant the actual dial....there are rivets.morzh — 08:42 PM
6TPZ and 5TPO Radio Help
This is what I meant. I would start from touching Test Point 12 on the sch. See if you hear hum.morzh — 08:37 PM
6TPZ and 5TPO Radio Help
Here are the links. 6TPZ and 5TPO The speakers are good. I've tried several known good ones. I just have to fi...R3Sons — 06:27 PM
Philco 91 Tuning Condenser
I just found a set screw. Was able to turn dial just enough to see it and loosen it. I have it off now.dconant — 06:14 PM
Philco 91 Tuning Condenser
Hello, Does anyone know how the dial plate comes off the tuning condenser shaft? The dial itself id so warped I can't...dconant — 06:01 PM
Eico 368 TV/FM Sweep Generator
Ron, for the future: In order to change the name of teh topic, 1. Go to the very first post. 2. Hit "Edit...morzh — 04:29 PM
6TPZ and 5TPO Radio Help
Transistors are easy. No converters. If you have input voltage, then just put some signal through. Or touch your fin...morzh — 04:25 PM
462ron
Hi Mike, I believe I tried different ways to change the header for my post but no luck. Anyway thanks for changing it fo...462ron — 04:02 PM
6TPZ and 5TPO Radio Help
Since these radios operated in harsh environments (temp changes and vibration) you could touch a soldering iron to all t...GarySP — 03:18 PM
6TPZ and 5TPO Radio Help
Thank you Gary. Hi Morzh. These radios are 6 transistor radios. Sadly no tubes. Thanks though.R3Sons — 02:19 PM

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

>