1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment

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

Threaded Mode
7050 tube tester
brownie45
Member
***
Posts: 54
Threads: 8
Joined: Nov 2012
City: Wilton, Iowa
#1

01-17-2018, 09:06 AM
Working on a Philco 7050 tester that won't come to center scale in the calibrate "line"
position except at the highest [extreme right] setting.

Tester seems to test tubes O.K.
I lifted the chassis out & everything looks factory, except maybe the line cord has
been replaced.
 Also noticed the 6X5GT/G rect.  Heard horror stories of these shorting & taking
out transformers.
Anyone have info on this happening when used in tube tester applications??

There is only a .1 @ 400 Volt cap underneath which looks a bit questionable. Probably
could be replaced??  I thought there might be a filter for the B+, but none there.

Is anyone aware of a schematic for this unit?

The roll chart [flips on side of case] says it's for a 7051.  Wondering if it has been
updated with a newer version?

Thanks for any info.
Jim
Find
morzh
Odobenus rosmarus
******
Posts: 16,507
Threads: 572
Joined: Oct 2011
City: Jackson State, Province, Country: NJ
#2

01-17-2018, 09:08 AM
Sometimes testers do that when the rectifier tube(s) panels' contacts need cleaning.
Mine does.
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
klondike98
Phorum Moderator
******
Posts: 5,170
Threads: 274
Joined: Nov 2012
City: Wilsonville State, Province, Country: OR
#3

01-17-2018, 10:12 AM
Thread moved to test equipment.
Cheers,
Bob
[Image: https://www.dropbox.com/s/5m63ib99yfx2eg....jpg?raw=1]
Bob's Restorations Web Page
Website Find
« Next Oldest | Next Newest »
Thread Closed




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM
Philco 42-345 Restoration/Repair
Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM
Philco model 38 code 121 not receiving signal.
Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM
Testing a speaker and output transformer Trutone A2-G
The equivalent of one short turn is basically the same as that of a shorted load. If it is the primary's turn, then the ...morzh — 03:53 PM
Testing a speaker and output transformer Trutone A2-G
I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM
Philco model 38 code 121 not receiving signal.
As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM
Philco model 38 code 121 not receiving signal.
Well why not! :lol:Stormlord5500 — 03:14 PM
Philco model 38 code 121 not receiving signal.
Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM
Testing a speaker and output transformer Trutone A2-G
morzh Short-circuited turns can be considered as a half-dead transformer. But on this case transformer will hot and s...Vlad95 — 11:01 AM
Testing a speaker and output transformer Trutone A2-G
I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM

[-]
Who's Online
There are currently 2119 online users. [Complete List]
» 1 Member(s) | 2118 Guest(s)
Avatar

>
  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment