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
1936 84B hum
PhilcoPhan1936
Jeff W.
******
Posts: 751
Threads: 91
Joined: Nov 2015
City: Jonesboro State, Province, Country: AR
#3

11-24-2018, 11:08 AM
Try checking the rivets to the tube shield bases, make sure the tube shield is making good contact with the base, and the base has good contact with the chassis.
Also, I have a 45C I worked on some time ago, and it had a loud hum 1st time I powered it up. It turned out the common wire to the electrolytic filter caps on the ground side had a break in it. It was a solid wire, and the break was inside the insulation, so it wasn't visible.
As soon as I replaced it with a new wire, I was up and running. Icon_thumbup
Blessings,
Jeff W.
Jonesboro, Arkansas

http://jeffsradios.weebly.com

God loves you as you are, not as you should be, because none of us are as we should be. - Brennan Manning
Find
« Next Oldest | Next Newest »
Thread Closed


Messages In This Thread
1936 84B hum - by Patrick - 11-24-2018, 10:42 AM
RE: 1936 84B hum - by drrenaud - 11-24-2018, 10:56 AM
RE: 1936 84B hum - by PhilcoPhan1936 - 11-24-2018, 11:08 AM
RE: 1936 84B hum - by Radioroslyn - 11-24-2018, 11:25 AM
RE: 1936 84B hum - by Patrick - 11-24-2018, 01:31 PM
RE: 1936 84B hum - by Patrick - 11-24-2018, 02:30 PM
RE: 1936 84B hum - by David - 11-24-2018, 03:44 PM
RE: 1936 84B hum - by tbone - 12-22-2018, 02:57 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Hi OSanders, Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM
5U4 vs 5Z4 tubes
I think that RCA and GE introduced metal tubes in the USA in 1936.  I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM
Philco 42-345 Restoration/Repair
Vlad95, Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM
5U4 vs 5Z4 tubes
A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM
Philco 42-345 Restoration/Repair
Thanks Rod, "When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM
Philco 42-345 Restoration/Repair
RodB :beerchug:Vlad95 — 10:22 AM
Philco 42-345 Restoration/Repair
Vlad, you nailed it. Swiss and German roots.RodB — 09:54 AM
5U4 vs 5Z4 tubes
Well this is a Hallicrafters SX/9 circa 1936. No real issues so far although I dodged a real bullet with a cap that was...bridkarl — 07:59 AM
5U4 vs 5Z4 tubes
The pinout is the same but the 5U4 has a 3 amp filament, verses 2 amps or less on the 5Z4. I think that the pinout of a ...Arran — 12:04 AM
Philco 42-345 Restoration/Repair
By the way. osanders0311 Take a look here: Dial cord stringing Guides May be here you can fount correct string settin...Vlad95 — 11:15 PM

[-]
Who's Online
There are currently 1073 online users. [Complete List]
» 1 Member(s) | 1072 Guest(s)
Avatar

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