Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Mitchell 1260 lumitone improve midrange
#1

Hello everyone,
I just finished Electrically restoring my Mitchell 1260 Lumitone radio lamp .
First off the start the set works well even without alighment done yet .
But I did notice there no real midrange lots highs thou what I am thinking is to change some coupling cap values and maybe a a capacitor or resistor to make this set less tiny .

Here is the Audio Section any suggestions far as maybe a RC circuit or maybe a LC circuit .
Far as this set I know that poor little speaker is not much  .

So capacitor and resistor  values are as follows 
C4- 005 ufd 
C6 ,C7 - .01ufd 
R6 - 6.8 megs ohms
R7 - 220k ohms
R8 - 470k ohms 

Sincerely Richard


Attached Files Image(s)
   


Messages In This Thread
Mitchell 1260 lumitone improve midrange - by radiorich - 12-25-2022, 05:05 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Hickok AC51 tube tester
Cleaned ann contacts, switches and sockets, works great now.martinj — 11:32 AM
Philco 42-1008 conversion kit
I read about a kit to convert the variable speed changer in the Philco 42-1008 into a single speed unit.  That would rem...alangard — 09:30 PM
HiFi (Chifi) tube amp build - but my own design.
Tim Well...a chassis is metal. Magnetic or not, it does not matter. A transformer has some hum to it. It is natural. Th...morzh — 08:40 PM
Hickok AC51 tube tester
I thought the 83 tube was bad because it looked white but it tests strong. Blue gassy though. I checked the fuse, it was...martinj — 08:37 PM
Shadow Meter Bulb
Ross I am not sure what current limiting effect the incandescent provides. They are two different parts of the sch...morzh — 08:31 PM
12' Philco
Bob Thanks for that photo. I have been looking for it, and I cannot find anythinmg on the web. I forgot it was here...morzh — 08:29 PM
Shadow Meter Bulb
I think after all has been said, I will use the same bulb that is specified for the dial pilot light which is a #55. I ...georgetownjohn — 07:31 PM
12' Philco
There was also this Philco! klondike98 — 07:25 PM
HiFi (Chifi) tube amp build - but my own design.
I expected a challenge and this is just part of it. But, it's also supposed to be fun, entertaining, informative and enj...TV MAN — 07:12 PM
Shadow Meter Bulb
Butting in here with a question. Since the shadow meter is connected directly to the 1st and 2nd I.F.'s wouldn't the met...RossH — 06:43 PM

[-]
Who's Online
There are currently 4716 online users. [Complete List]
» 1 Member(s) | 4715 Guest(s)
Avatar

>