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

Linear Mode
rebuilding tone control block
Arran
Phorum Expert
*****
Posts: 4,894
Threads: 54
Joined: Sep 2008
City: Sandwick, BC, CA
#7

02-19-2013, 01:06 AM
The only place where I have heard (or read) it recommended to use higher a higher voltage cap is across the primary of the output transformer, I have not heard of it being an issue between plate and ground. In this case, if the diagram is accurate, closing the switch increases the capacity, opening it decreases it since you have two caps in series, it's more a treble cutting control then a tone control. Also since they are in series that means that the total voltage will be double that of a single cap so the only cap that you should be concerned with in terms of voltage rating is the .02 uf one. Tube radio audio isn't generally that bad as long as you replace all of the bias resistors in the audio stages as well as the caps.
Regards
Arran
(This post was last modified: 02-19-2013, 01:08 AM by Arran.)
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
rebuilding tone control block - by bfrohwein - 02-18-2013, 02:03 AM
RE: rebuilding tone control block - by 7estatdef - 02-18-2013, 09:27 AM
RE: rebuilding tone control block - by bfrohwein - 02-18-2013, 10:17 AM
RE: rebuilding tone control block - by 7estatdef - 02-18-2013, 12:42 PM
RE: rebuilding tone control block - by bfrohwein - 02-18-2013, 11:34 PM
RE: rebuilding tone control block - by 7estatdef - 02-18-2013, 11:41 PM
RE: rebuilding tone control block - by Arran - 02-19-2013, 01:06 AM
RE: rebuilding tone control block - by bfrohwein - 02-19-2013, 02:03 AM



Users browsing this thread:
[-]
Recent Posts
PT 6 chassis screws size???
Have this done except for missing chassis screws. It looks like 1 inch 6/32 sheet metal screw may work but can anyone s...bridkarl — 10:32 PM
Philco model 38 code 121 not receiving signal.
Hello Stormlord, Well done on rewinding that coil it turned fairly good for your first one. Sincerely Richardradiorich — 09:12 PM
Philco model 38 code 121 not receiving signal.
Well here it is. It ain't pretty, but hopefully it'll work. I checked it with my DMM on continuity and it keeps and r...Stormlord5500 — 08:56 PM
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM
Philco model 38 code 121 not receiving signal.
Well why not! :lol:Stormlord5500 — 03:14 PM

[-]
Who's Online
There are currently 959 online users. [Complete List]
» 1 Member(s) | 958 Guest(s)
Avatar

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