1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Linear Mode
Model 118 shadowmeter
jerryhawthorne
Phorum Expert
*****
Posts: 1,562
Threads: 56
Joined: Nov 2008
City: Sedona, AZ/Placentia/CA
#3

02-28-2014, 03:35 PM
Steve, I'm not certain when Philco started adding the shunt resistor (external to display) but I have done radios with and without. It was added I suspect when engineers started realizing if the shadow meter coil opened the radio would die completely. The shunt would allow it to continue to operate. Not certain if they made a change in resistance of the coil when they added the shunt.
Jerry
A friend in need is a pest!  Bill Slee ca 1970.
Find
« Next Oldest | Next Newest »


Messages In This Thread
Model 118 shadowmeter - by Steve D - 02-28-2014, 11:11 AM
RE: Model 118 shadowmeter - by morzh - 02-28-2014, 11:21 AM
RE: Model 118 shadowmeter - by jerryhawthorne - 02-28-2014, 03:35 PM
RE: Model 118 shadowmeter - by hsusmann - 02-28-2014, 07:48 PM
RE: Model 118 shadowmeter - by Steve D - 03-02-2014, 05:14 PM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
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....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
HiFi (Chifi) tube amp build - but my own design.
Mike, Tim; you are about to enter the twilight zone. Doo doo doo doo, doo doo doo doo This is something alright. I'm go...RodB — 06:26 PM

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

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