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
Shadow Meter Bulb
morzh
Odobenus rosmarus
*****
Posts: 15,813
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
#4

3 hours ago
Gary

I doubt it would introduce any noise. We use similar lamps for the panel indication, 12V AC lamps: they are LEDs with a diode and a resistor. No active circuitry. And because there is no inrush (no capacitors) there should be little to no noise; not anymore than you would have from a regular lamp.

I have not seen these with active circuitry: this, given the size, price etc would be a waste.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Find
« Next Oldest | Next Newest »


Messages In This Thread
Shadow Meter Bulb - by georgetownjohn - Yesterday, 06:53 PM
RE: Shadow Meter Bulb - by RodB - 6 hours ago
RE: Shadow Meter Bulb - by GarySP - 6 hours ago
RE: Shadow Meter Bulb - by morzh - 3 hours ago
RE: Shadow Meter Bulb - by RodB - 1 hour ago



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
And so does a barber shop quartet. mmmmmmRodB — 03:54 PM
Shadow Meter Bulb
I did try an LED bulb in place of the original but wasn't impressed with the amount of light on the dial. Seems like it ...RodB — 03:51 PM
HiFi (Chifi) tube amp build - but my own design.
Tim Would mounting he transformer vertically change the hum, if used without additional parts? Also, in these amps...morzh — 02:25 PM
Shadow Meter Bulb
Gary I doubt it would introduce any noise. We use similar lamps for the panel indication, 12V AC lamps: they are LEDs...morzh — 02:15 PM
Shadow Meter Bulb
Not sure if anyone has tried this but there are 6.3 volt miniature lamps in bayonet and screw-in base options available ...GarySP — 11:31 AM
Shadow Meter Bulb
Any 6.3 volt pilot light will work. I would use the brightest one I could find in my workroom. Be sure the dial is clean...RodB — 10:45 AM
HiFi (Chifi) tube amp build - but my own design.
Tim, nice write up and thanks for sharing !! Sincerely Richardradiorich — 02:47 AM
HiFi (Chifi) tube amp build - but my own design.
Well, this was a real "Hum-Dinger" :lol: ! This will be kinda long, but hopefully it will help others having t...TV MAN — 01:55 AM
Shadow Meter Bulb
Phorum members, I am trying to find the bulb # for PHILCO Shadow Meter part number 45-2180 that is from a 37-640 chassis...georgetownjohn — 06:53 PM
Philco 41-608 changer coupler
3D-printing...short of machining, of course. Or molding.morzh — 05:20 PM

[-]
Who's Online
There are currently 6736 online users. [Complete List]
» 2 Member(s) | 6734 Guest(s)
AvatarAvatar

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