Jackson 636 Tube Tester

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Jackson 636 Tube Tester

Post by Resistance is Futile on Wed Oct 22, 2008 2:08 am

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Last edited by Bill Cahill on Sat Apr 19, 2014 2:19 pm; edited 1 time in total (Reason for editing : Requested by poster.)
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Jackson 636 Tube Tester

Post by tdruss on Tue Mar 12, 2013 11:53 am

I recently acquired a Jackson 636 Tube Tester. Many of the tube data on the scroll refer to using "Socket X". Does anyone have an idea of what that is? It seems to be a 7 pin socket but it does not work on the existing 7 pin socket (which works fine when not specifying socket x). Any help will be greatly appreciated.

tdruss from Western North Carolina

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Re: Jackson 636 Tube Tester

Post by Bill Cahill on Tue Mar 12, 2013 1:07 pm

What numberso f tubes, examples, does it call for socket X on?
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Re: Jackson 636 Tube Tester

Post by tdruss on Tue Mar 12, 2013 1:35 pm

Here are some examples:
12AL5, 12BD6, 3B4, 6AB4,19J6, 6AN5, 26A6, 6J4, 9003

Also just noticed a 1V2 for a 'Z socket'
1X2 for a 'Y Socket'

Thanks

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Re: Jackson 636 Tube Tester

Post by Bill Cahill on Tue Mar 12, 2013 3:36 pm

Those sockets were 9 pin min. These are adaptor sockets you need that plug into another socket.
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Re: Jackson 636 Tube Tester

Post by tdruss on Tue Mar 12, 2013 4:01 pm

Thank you for clarifying for me. Do you know of a source for the adapter sockets?

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Re: Jackson 636 Tube Tester

Post by Bill Cahill on Tue Mar 12, 2013 4:42 pm

Sorry, but, no. They don' t come up very often, except usually with existing testers.
You might want to consider getting a better tube tester.
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Re: Jackson 636 Tube Tester

Post by Bill Cahill on Thu Apr 17, 2014 11:15 am

Our friend Resistance is Futile asked me to post this link for him.
http://antique-radio-lab.forumotion.com/t414-jackson-test-equipment

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Re: Jackson 636 Tube Tester

Post by Resistance is Futile on Thu Apr 17, 2014 5:34 pm

I believe What you refer to as SOCKET actually may be CIRCUIT!
Here is an explanation:
This is from the Tubesound web page:
...."Tube Setup Data Information

As previously explained, model 561 shares the same “Dynamic Output” test method and Control Layout with model 634. There are two minor differences: (1) model 561 has “Circuit X” — a set of lockout switches that Open circuits to individual tube pins, which model 634 does not have; (2) model 561 has the Plate Control indexed from 0 to 50, whereas model 634 indexes the Plate Control from 0 to 100. The “Circuit Y” control on the 561 is the equivalent of “Circuit” control on model 634.

Therefore, with slight modification, you can use the tube setup chart from model 634 with your 561. This is very useful because the 561 roll chart does not provide data for most antique 4-pin & 5-pin types. To use the 634 chart, you must (1) Leave Circuit X in the Normal position, and (2) divide the Plate Control setting in half. Very simple.

Let us use a #10 Power Triode as an example. This is one of the few early 4-pin triodes that are listed on both the 561 roll chart and the 634 chart.
•561 roll chart: “7.5 Fil., Circuit X = normal, Plate = 18, Circuit Y = 2, Z = LS”
•634 chart: “7.5 Fil, Plate = 36, Circuit = 2, LS”

Obviously, the only change was the plate control being double on the 634. This is common sense when you remember that model 634 indexes the Plate Control from 0-100, instead of 0-50.

Another quick example, consider Diode #1 of a #83 rectifier.
•561: “5.0 Fil., X = Normal, Plate = 9, Y = 2, Z = S”
•634: “5.0 Fil., Plate = 18, Circuit = 2, S”

Therefore, the pattern is obvious. One unique setup data quirk is that a 6L6 has slightly different setup on the 561 than the 634, but when tested under the 634 setup data, the results are actually slightly more accurate, so either are acceptable.
"
This is copied under Fair use Doctrine.
I think what Bill explained refers to a wiring adapter to go from one type of tube to adapt to another type of Tube using the same onboard socket. However I could be wrong on this.
Is this correct Bill?
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Re: Jackson 636 Tube Tester

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