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

Wrong POT + resistor = right POT ???
#1

8/30/20
If original volume POT is 2 MOhms with a 1 Meg Ohm center tap - but I found a new replacement POT which is 1.5 Mohm with a .75Mohm center tap, can I make this into the correct POT by adding in a .5Mohm resistor to one of the end terminals and a .25Mohm resistor to the center TAP in order to make it have the same resistance as the original specifications? The resistors would be added in series between the terminal(s) and whatever normal connection would have been attached directly to the terminal.
#2

My first thought is no...

However, try lashing up the new pot and resistor, don't mount it and try it to see if you get the desired results. IMHO the tap is for tone and the radio may not sound right at lower volume settings. The speaker must be in its baffle to get the proper acoustical response.

You can get the exact part from Mark Oppat oldradioparts.net. GL Chas

Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
#3

Hi I would try it I doubt you would notice any difference from original with out adding resistors.
Forrest
#4

I will try it as is !  Thanks




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Need to purchase some accessories for restoration of my Old Philco Radio
Hi Paulo, Welcome to the Philco Phorum. I can see why you want to find good reproduction parts. That is a bea...MrFixr55 — 11:10 PM
HiFi (Chifi) tube amp build - but my own design.
Tim, I have some bakelite sockets in my work shop that I can dig up. I believe quite a few are NOS. I will take photo...RodB — 10:03 PM
Philco 610B oscillator wiring
> The cathode as noted is wired directly to the ground side of the heater filament for that tube, not to the #17 and ...Radioroslyn — 08:12 PM
HiFi (Chifi) tube amp build - but my own design.
Tim; I noticed your post a little late, but I would take one of the junk sockets and try to break a chunk out of it wi...Arran — 08:07 PM
Need to purchase some accessories for restoration of my Old Philco Radio
Here is a list of resources found in our online library that you might find useful. Mike's Gobs of Knobs email addres...klondike98 — 01:46 PM
First Radio restoration
Hi Tubeman, Welcome to the Philco Phorum.  Phamily Phriendly Pfun with Phine Pholks Phull of Philco Phacts. (See a p...MrFixr55 — 12:33 PM
First Radio restoration
You could post in the WANTED ADs section here on the Phorum and see if anyone has an RF generator that they want to sell...klondike98 — 11:55 AM
Zenith H725
Good ideas, thank you Arrange and Rich. I have the adhesive aluminum foil already and can try that immediately. More ...EdHolland — 10:18 AM
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
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

[-]
Who's Online
There are currently 1996 online users. [Complete List]
» 4 Member(s) | 1992 Guest(s)
AvatarAvatarAvatarAvatar

>