I am trying to collate in an easily readable form, all the tube data for the venerable Heathkit Tube Checker. I have started with the similar models: IT-17, IT-21, IT-3117. The document will mostly consist of a giant table of tester setting for all known tubes. An example page is included with this post. As of now I have 2343 different tube entries in the table. To collect all these I have had to collate different sources from Heathkit. I have Roll Chart 14391 for the IT-21 from 1966, Supplement Test Data Sheet for use with Heathkit IT-21 Tube Checkers also from 1966, and a Heathkit publication #597-1442 from 1975.
I need help discerning which are the proper settings between conflicting entries between the documents. As an example, I have included the entries for the 6AN4 tube.
[img] removed link [/img]
This is, not that it matters, an indirectly heated high-mu triode mounted in a miniature 7 pin base and designed for use as a grounded grid amplifier or mixer in UHF television applications. The plate is connected to pins 1 & 7, the grid to pins 2 & 6, the cathode to pin 5 and the heater between pin 3 &4. Both contradicting entries can be found between the lines added in the middle of the page.
As you probably know these tube checkers configure the tube as if it is was diode. So I expect the high voltage to be applied to the plate and grid, the low voltage to the cathode and the heater voltage to the heater. This means switches AGBF Should be moved to the top to apply high voltage (100V), E and one of the heater connections, C or D, move to the bottom to apply neutral potential 0V) and the other heater connection, D or C remains in the middle position to apply heater voltage (6.3V). Which is what is found in the table of both charts. However they differ in which characters are in bold.
Can anybody assure me, with the reasons why, that the entry from the later Heathkit publication #597-1442 is correct and the one on the roll chart is in error?
No external links can be added to your first post, the links will automatically be removed until you’re an active member. I updated your profile so your link should post now. The system automatically does this to prevent spam. Let me know if you have any issues.
Here is the link to the missing file
[img] removed link [/img]
Thanks
@heathkit-aficionado The system still doesn’t recognize your link. I updated your profile to a higher tier, please try posting it again.
Mr Carlson’s Lab Moderator
I’m not able to see the link for the collated tube data chart. It still states link removed.. ??
Now I see an image but it’s only one page pg.19
I still don’t see the link, it’s removed no link is available for me.
[img] removed link [/img] I got the email to verify myself on here this is what I see for the data.
Still only see one page, pg 19
There is only one image available (page 19) the other links were removed because the original poster was new to the forum. This is automatic to prevent spam.
-Mr Carlson’s Lab Moderator


