[AMRadio] Jackson Model 648-2 Tube Checker

[manualman at juno.com]

Everything you would ever want to know about a Jackson 648 and its
variants:
http://www.vacuumtubesinc.com/Products/BooksPamphlets/TheJacksonModel648M
anual.aspx
Copy and paste to browser - watch for possible wrap-around because of
link length.

Pete, wa2cwa
http://www.manualman.com

On Sun, 3 Feb 2013 14:38:41 -0500 (EST) BUDW2GLN at aol.com writes:
> I am in the process of troubleshooting a problem with my Jackson 
> Model  
> 648-S tube checker.  
>  
> I an trying to trace out a problem with the loss of filaments 
> voltage to  
> ALL the tube sockets.  All I have is the print the is stapled inside 
> the  
> case....This unit is a colored wire nightmare.......Does anyone know 
> if their 
> is  any additional service information that is available to help 
> with this 
> problem  ???........There were several of the 648 and 649 series 
> built back in 
> or around  '60 through '65...
>  
> It is an excellent tube checker and I am sure lost without it   :-)
>  
> I would appreciate any information and help
>  
> Thanks 
>  
> 73
>  
> Bud  W2GLN