Tube question

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

Tube question

Arran
Phorum Expert

Posts: 4,910
Threads: 54
Joined: Sep 2008
City: Sandwick, BC, CA

08-28-2012, 01:02 AM

If the tester says it's good keep the tube, the low filament voltage reading is unrelated to the tube. There can only be two causes for low filament voltage across a tube heater: (1) you are measuring from the wrong reference points (2) the rest of the tubes and ballast are dropping too much voltage from the string. However if something were dropping too much voltage across the string then the heater voltages would be lower on all tubes not just the 6K8 tube.
Regards
Arran

Find

« Next Oldest | Next Newest »

Thread Closed

Messages In This Thread

Tube question - by Eric - 08-27-2012, 05:26 PM

RE: Tube question - by rghines1 - 08-27-2012, 07:37 PM

RE: Tube question - by Eric - 08-27-2012, 08:21 PM

RE: Tube question - by Arran - 08-28-2012, 01:02 AM

RE: Tube question - by Eric - 08-28-2012, 12:15 PM

RE: Tube question - by codefox1 - 08-28-2012, 02:12 PM

RE: Tube question - by Eric - 08-28-2012, 04:05 PM

RE: Tube question - by Arran - 08-29-2012, 07:46 PM

RE: Tube question - by Eric - 09-01-2012, 10:47 PM

RE: Tube question - by Steve Davis - 09-02-2012, 02:31 PM

RE: Tube question - by Eric - 09-03-2012, 10:00 AM

RE: Tube question - by 7estatdef - 09-03-2012, 04:47 PM

RE: Tube question - by Eric - 09-04-2012, 03:44 PM

RE: Tube question - by 7estatdef - 09-04-2012, 05:26 PM

RE: Tube question - by Eric - 09-06-2012, 01:20 PM

View a Printable Version

Users browsing this thread:

Recent Posts
Philco 42-345 Restoration/Repair
With regard to the speaker, unless the cone is so brittle that it crumbles as soon as you touch it I would try to repair...Arran — 04:07 AM
Philco 42-345 Restoration/Repair
That silver can capacitor is an aluminum electrolytic. You should replace it with an aluminum electrolytic with the valu...RodB — 11:46 PM
Philco 42-345 Restoration/Repair
Thank you Rodb and Gary for helping with clarification on these capacitors. Other than the Tiny 630volt one I'm not sure...osanders0311 — 10:17 PM
1949 Motorola 5A9M
Hello All; I found the CMB41L down in the basement, it is definitely a 1950-51 model, the capacitors have date codes ...Arran — 07:48 PM
Philco 42-345 Restoration/Repair
Hi, all the caps I order, other than the electrolytics, are of the 630V rating. No worries on it being too high, and no ...gary rabbitt — 05:46 PM
Philco 42-345 Restoration/Repair
Hi, there's a lot to consider when designing these circuits so you shouldn't have a lot of concern when replacing caps. ...RodB — 02:03 PM
Philco 42-345 Restoration/Repair
I have ordered and received new caps for this radio and hope I've ordered the correct ones. I tried matching them to the...osanders0311 — 11:35 AM
Philco newbie with P-1891-WA console questions
Hello Jeff , Far as the Electrolytic capacitors go here is a list of parts. that will work . I like using Nichicon and...radiorich — 09:50 PM
Philco newbie with P-1891-WA console questions
Well, I've been stumped at trying to get the first of 11 electrolytic capacitors. I got a schematic and have a list of t...Jeffcon — 07:54 PM
Model 80 Antenna Issue?
Thanks Gary and Rod. I also found an article in the Philco Repair Bench under Service Hints and Tips, about installi...Hamilton — 12:32 PM

Who's Online

There are currently 442 online users. [Complete List]
» 1 Member(s) | 441 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me