[AMRadio] Jackson Model 648-2 Tube Checker

[rbethman]

Have you gone to Edebris?

<http://bama.edebris.com/manuals/jackson/648>

Bob - N0DGN

On 2/3/2013 2:38 PM, BUDW2GLN at aol.com wrote:
> 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
>