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7050 tube tester
brownie45
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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
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morzh
Odobenus rosmarus
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Posts: 15,825
Threads: 554
Joined: Oct 2011
City: Jackson, 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.
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klondike98
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Posts: 5,088
Threads: 270
Joined: Nov 2012
City: Wilsonville State, Province, Country: OR
#3

01-17-2018, 10:12 AM
Thread moved to test equipment.
Cheers,
Bob
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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment