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: 1 Guest(s)
[-]
Recent Posts
Does the 20 Deluxe use photofinish?
I recently bought a can of oms and it now says Lo-odor mineral spirits. When I use citrus stripper I leave it on for...RodB — 11:09 AM
Does the 20 Deluxe use photofinish?
It's on a scale of how bad is it compared to... Naphtha, chlorine bleach, mek, and lacquer thinner it's odorless.Radioroslyn — 10:26 AM
Does the 20 Deluxe use photofinish?
Yeah, always wondered why they call them spirits "odorless". It sure enough smell like a gas station.morzh — 10:10 AM
Does the 20 Deluxe use photofinish?
I usually don't do any sanding till all the stripping is done. The veneer on the cabinet is thin and it is easy to sand ...Radioroslyn — 09:49 AM
HiFi (Chifi) tube amp build - but my own design.
As I remember it, the shock from that B+, about 250VDC, felt worse than the shocks I experienced from 220VAC.morzh — 09:14 AM
Hickok 288x
They worked for 85 years as .05's and my other machine which operated perfectly has them. Doubt thats the issue. What ty...daveone23 — 09:01 AM
462ron
LOL@ MrFixr. I remember an encounter with my first tube radio.. I think I have posted this before. Back when I knew just...462ron — 08:07 AM
HiFi (Chifi) tube amp build - but my own design.
I absolutely attribute my reaching 63 to God's benevolence, but this apart, it has never occurred to me to tap anything ...morzh — 07:55 AM
Does the 20 Deluxe use photofinish?
No, it did not use photo-finish. It is veneer with the shading on the front of changing darkness.morzh — 07:52 AM
Philco 66 No Plate Voltage
We could also mention the factory miswire of the tweeters on 38-690. Or the fact that even with this fixed, one could no...morzh — 07:51 AM

[-]
Who's Online
There are currently 3424 online users. [Complete List]
» 1 Member(s) | 3423 Guest(s)
Avatar

>