[Hallicrafters] A question on tube socket pin-out

[Paul Kraemer]

Skip
I have always found the following:
Look at the bottom view of the tube base or ply (viewed from the pin end)
There will be two pins larger than the rest
Start at the lower left is pin 1 and going around clockwise to pin 4 or 5 or 
6 or 7
8 and 11 pin have a keyway
7 and 9 miniature have a space

Always pin 1 on the lower left and go clockwise to "n" pins
Always a keyway or space  or two pins larger than the others

Regards
Paul K0UYA

----- Original Message ----- 
From: "Waldo Magnuson" <magnuson at mac.com>
To: <hallicrafters at mailman.qth.net>
Cc: "Waldo Magnuson" <magnuson at mac.com>
Sent: Thursday, July 10, 2008 6:55 PM
Subject: [Hallicrafters] A question on tube socket pin-out


> My references have failed me.  I am trying to make a 5-pin to 8-pin 
> adapter so I can test a five pin tube on my Hickok tube tester.  I have 
> both plug (8 pin) and socket (5 pin).  The 8 pin plug is numbered so I 
> know which pin is 1, 2, etc. which I knew already anyway.  I need to 
> connect pin 1 of the 5 pin socket to pin 1 of the 8 pin plug, 2 to 2, 3 to 
> 3, etc.
> But which pin is pin 1 on the five pin socket?  One pin is separated from 
> the other four pins - which pin is it?  Can someone point me to a 
> reference which shows (My RCA RC-21 doesn't show which is pin one) 
> identified pin layouts.
> Thanks.
> 73,  Skip  W7WGM
>
> ______________________________________________________________
>