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

Philco 645 Hum-m-m-m
#1

Has someone got half a minute to assess the hum on this set before I put the chassis back into the cabinet hopefully for the last time.

The hum comes on as the set warms up and is only slightly increased with the volume control. It isn't especially noticeable when the audio is on. The only thing I've done to address the issue is to switch the 6A7, but with no change. Here's link to a 30-second video clip.

https://picasaweb.google.com/coldrb/Phil...directlink

My question is whether it's worthwhile to try to kill the hum, or should I leave well-enough alone?


Messages In This Thread
Philco 645 Hum-m-m-m - by Winky Dink - 04-07-2014, 08:21 PM
RE: Philco 645 Hum-m-m-m - by gregb - 04-07-2014, 08:24 PM
RE: Philco 645 Hum-m-m-m - by Warren - 04-07-2014, 09:05 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-07-2014, 09:23 PM
RE: Philco 645 Hum-m-m-m - by Ron Ramirez - 04-08-2014, 05:31 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-08-2014, 10:10 AM
RE: Philco 645 Hum-m-m-m - by PAradiogeek - 04-08-2014, 11:16 AM
RE: Philco 645 Hum-m-m-m - by TA Forbes - 04-08-2014, 01:26 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-09-2014, 12:54 AM
RE: Philco 645 Hum-m-m-m - by TA Forbes - 04-09-2014, 10:58 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-09-2014, 01:45 PM
RE: Philco 645 Hum-m-m Fixed? - by Winky Dink - 04-12-2014, 10:43 AM
RE: Philco 645 Hum-m-m-m - by Steve Davis - 04-12-2014, 11:36 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-12-2014, 11:57 AM
RE: Philco 645 Hum-m-m-m - by TA Forbes - 04-12-2014, 12:04 PM
RE: Philco 645 Hum-m-m-m - by BrendaAnnD - 04-12-2014, 04:18 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-13-2014, 05:14 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-13-2014, 09:28 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-14-2014, 01:29 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-14-2014, 08:23 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-16-2014, 04:28 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-16-2014, 10:30 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-16-2014, 04:24 PM
RE: Philco 645 Hum-m-m-m - by TA Forbes - 04-16-2014, 04:43 PM
RE: Philco 645 Hum-m-m-m - by morzh - 04-16-2014, 05:05 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-17-2014, 04:54 AM
RE: Philco 645 Hum-m-m-m - by morzh - 04-17-2014, 08:54 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 04-18-2014, 01:08 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-02-2014, 11:20 PM
RE: Philco 645 Hum-m-m-m - by Arran - 07-03-2014, 12:21 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-03-2014, 01:53 AM
RE: Philco 645 Hum-m-m-m - by morzh - 07-03-2014, 09:45 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-04-2014, 12:37 AM
RE: Philco 645 Hum-m-m-m - by morzh - 07-05-2014, 11:09 PM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-06-2014, 01:57 AM
RE: Philco 645 Hum-m-m-m - by morzh - 07-06-2014, 08:58 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-06-2014, 09:30 AM
RE: Philco 645 Hum-m-m-m - by morzh - 07-06-2014, 10:16 AM
RE: Philco 645 Hum-m-m-m - by Winky Dink - 07-07-2014, 08:04 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM

[-]
Who's Online
There are currently 2354 online users. [Complete List]
» 1 Member(s) | 2353 Guest(s)
Avatar

>