Twin Triode Switch model 7608B (Noval 9-pin) for Hickok tube testers

Description

Twin Triode Switch model
7608B (Noval 9-pin)
for Hickok tube testers
Does this switch change my tube tester settings or its measuring characteristics at all?
Absolutely not, this switch does not change any of your tube tester settings nor it would alter your tube tester’s measuring characteristics, it just simplifies the test procedures.
Why should I use a Twin Triode Switch on my Hickok?
You may have noticed that most popular
Noval 9-pin basing (9A, 9AJ) twin triodes use setting 76080 on triode #1 and 21030 on triode #2, it is a lot of fiddle around and causes tube tester mechanical wear.  This gadget will simplify your work for fast, accurate and consistent test results while minimizing tube tester mechanical wear, making twin triode test nice and easy!
How do I use it on my Hickok?
Take a 12AX7 dual triode as an example, just do the tube tester setting as you normally would for Triode #1 76080 and insert the Twin Triode Switch on the Octal socket.  Carefully insert the 12AX7 on the Twin Triode Switch Noval socket (9-pin), allow the tube to warm up and do the Line Adjust as you normally would, perform the Gm or Good/Bad test as usual.  On the Twin Triode Switch toggle switch position #1 is your Triode #1 and toggle switch position #2 is your Triode #2.
You can now test your dual section triodes and verify how closely they match at the flick of the toggle switch, no messing around with the tube tester settings over and over again.
Which model(s) should I get?
If your tester is a Hickok 533/A,
534, 536, 538, 547A, 600/A, 605A, 750, 800/A/K, TV-3, TV-10, KS-15560-L1, KS-15750-L1/L2, 1575 or a Stark 9-66/A (Canadian Hickok) then you are looking at the correct
Model 7608B
in this listing for Noval 9-pin basing (9A, 9AJ) twin triodes.
If your tester is a Hickok 6000/A/B, 6005, 539A/B/C or TV-7A/B/C/D then you should look for
Model 7608A
, refer to separate listing on eBay.
Model 4506
is for Octal 8-pin basing (8BD) twin triodes for all the Hickok models listed above, refer to separate listing on eBay.
You may want to get a set of the Twin Triode Switches (Model 7608B & Model 4506) unless you have specific reasons not to.
Every switch is carefully handmade and fully tested.  Ceramic tube socket, 304 SS steel nuts and bolts,
USA
ferrite beads
to suppress or filter the amount of high frequency electromagnetic interference (EMI) noise
if any.
Shipping from Hong Kong is very affordable worldwide (for example USD5 to
USA
by air).  I charge actual postage with no handling fees, happy to combine shipping.  Happy vacuum tube testing!
Warning – do not attempt to use this switch to test a vacuum tube which requires tube tester setting other than 76080 !
Popular twin triodes with tube tester setting 7608x are as follows:- 6AQ8, 6BQ7, 6BZ7, 6CG7/6FQ7, 6DJ8, 6ES8, 12AD7, 12AT7, 12AU7, 12AV7, 12AX7, 12AY7, 12AZ7, 12BH7, 5751, 5814, 5963, 5965, 6060, 6072, 6085, 6189, 6201, 6211, 6414, 6680, 6681, 6922, 7025, 7247, 7308, M8136, M8137.