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Old 2nd December 2014, 08:32 AM   #1
Dagwood is offline Dagwood  New Zealand
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Default TV-7D/U Tube Tester

I recently acquired very nice TV-7D/U tube tester, my what a piece of engineering!

Only issue is that none of the adapter sockets came with it so I'm going to build a copy of the E105 as I want to test a few 829b tubes.

So working with my DMM I've worked out the pin-out as this......

Octal Pin 1 - Septar Pin 4 - Cathode
Octal Pin 2 - Septar Pin 5 - Heater
Octal Pin 3 - Septar Pin 3 - Grid 2
Octal Pin 4 - Septar Pin 2 - Grid 2 of 1 (LINKED)
Septar Pin 6 - Grid 1 of 1
Octal Pin 5 - Fly lead - Plate 1
Octal Pin 6 - N/C
Octal Pin 7 - Septar Pin 1 - Heater (LINKED)
Septar Pin 7 - Heater
Octal Pin 8 - Fly lead - Plate 2

Has anyone got one of these that they could check my workings against?

Cheers
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Old 3rd December 2014, 01:09 AM   #2
Dagwood is offline Dagwood  New Zealand
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No bites????

Someone must have one of these they can check for me?

Cheers
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Old 3rd December 2014, 02:03 AM   #3
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I get the following,

Octal Pin 1 - Septar Pin 4
Octal Pin 2 - Septar Pin 5
Octal Pin 3 - No Connection
Octal Pin 4 - Septar Pin 2
Octal Pin 5 - Fly lead
Octal Pin 6 - Septar Pin 3
Octal Pin 7 - Septar Pin 1+7
Octal Pin 8 - Fly lead

I used this sheet as a reference for the Septar pinout http://www.tubecollector.org/documents/bases/diag24.gif
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Old 3rd December 2014, 04:35 AM   #4
Dagwood is offline Dagwood  New Zealand
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Hi mcandmar

Thank you, Just had a look and your right.

Ill solder it up tonight and post some pics

Thanks again
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Old 4th December 2014, 09:02 AM   #5
Dagwood is offline Dagwood  New Zealand
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Old 4th December 2014, 09:49 AM   #6
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Very nice. Where did you get the right angle octal socket part?
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Old 5th December 2014, 03:38 AM   #7
Dagwood is offline Dagwood  New Zealand
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Hey mcandmar

I think it came with a mixed lot of parts that a won on TradeMe (NZ Ebay)

They are very well made, but no marking on them??

Cheers
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