Forums :: NEW! Web Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives
Support This Site: Contributors :: Advertise


It is currently Oct Mon 25, 2021 6:56 pm


All times are UTC [ DST ]





Post New Topic Post Reply  [ 6 posts ] 
Author Message
 Post subject: 12AXX Tube Family Test Adapter
PostPosted: Dec Sat 19, 2020 8:21 pm 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 1753
Location: Wayside, NJ Monmouth
Been going through my stash of tube. When testing the 12AXX family, I find it switching the tube tester setting's to test one Triode section then the other a P.I.T.A. So I built up this adapter. I used what parts I had on hand. You set the tube tester for a 6SN7 and the load settings for the 12AXX tube your testing. Plug in the tube and now all you have to do is switch between Section one or two.


Attachments:
Adapter01.jpg
Adapter01.jpg [ 556.54 KiB | Viewed 1532 times ]
Adapter02.jpg
Adapter02.jpg [ 581.59 KiB | Viewed 1532 times ]
Adapter03.jpg
Adapter03.jpg [ 519.06 KiB | Viewed 1532 times ]
Adapter04.jpg
Adapter04.jpg [ 1.87 MiB | Viewed 1532 times ]
Top
 Profile  
 
 Post subject: Re: 12AXX Tube Family Test Adapter
PostPosted: Dec Sat 19, 2020 10:18 pm 
Member

Joined: Jan Thu 01, 1970 1:00 am
Posts: 2056
Location: Oswego, NY, USA
which model tube tester are you using?? I ask this because some testers, including my Heathkit TT1, don't require this type of home-made switching adapter because it already has this feature built into the tester. And I know there are other testers available that do this for you. Also, testers like the Eico 666 and 667 don't have this feature built into them, but with creative panel switch setups, one can usually accomplish this. IMO it's interesting that many of the printed/published tube data setup charts for the TT1 and Eico 666/667's don't necessarily incorporate this feature, until you study the settings and edit/modify them a bit to do this. As an example, several years ago, I spent one evening editing over 30 of the Heathkit TT1 1978 data booklet settings to do this, where the editors had totally missed it. Fred


Top
 Profile  
 
 Post subject: Re: 12AXX Tube Family Test Adapter
PostPosted: Dec Sat 19, 2020 10:22 pm 
Member
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 1753
Location: Wayside, NJ Monmouth
Good Evening Fred, I have an Eico 666 and a I-177 military tester. I was unaware that some tube testers have this function built in. Thank You for that information.


Top
 Profile  
 
 Post subject: Re: 12AXX Tube Family Test Adapter
PostPosted: Dec Sat 19, 2020 11:10 pm 
Member
User avatar

Joined: Dec Tue 23, 2014 6:51 pm
Posts: 2367
Location: N. Palm Bch, Fl.
You really did get cabin fever. I don’t see where I would use either of your projects, but that doesn’t mean they are bad. I enjoy making crazy things like those for myself. Some work and some are flops which I store in the round filing cabinet, but I have a lot of fun building them.

Freeman


Top
 Profile  
 
 Post subject: Re: 12AXX Tube Family Test Adapter
PostPosted: Dec Fri 25, 2020 10:26 pm 
Moderator
User avatar

Joined: Jan Thu 01, 1970 1:00 am
Posts: 9600
Location: Latham NY 12110
I am lazy and bought this https://www.ebay.com/itm/Twin-Triode-Sw ... 4217c6487d


Attachments:
s-l1600.jpg
s-l1600.jpg [ 443.11 KiB | Viewed 1433 times ]
Top
 Profile  
 
 Post subject: Re: 12AXX Tube Family Test Adapter
PostPosted: Dec Thu 31, 2020 1:21 pm 
Member
User avatar

Joined: Nov Wed 30, 2016 7:35 pm
Posts: 11105
Location: Sunbury, Ohio 43074
what did you pay for that little pencil sharpener? :mrgreen:

_________________
Preserving the hist. of electronics, one boat anchor at a time! :)
https://www.bbtvtestequipment.com


Top
 Profile  
 
Post New Topic Post Reply  [ 6 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 5 guests



Search for:
Jump to:  


































Privacy Policy :: Powered by phpBB