[Boatanchors] hEATHKIT SB-220 METER SHUNTS

[Jim]

The ARRL Handbook detailed a procedure for determining the value of meter 
shunts.

Jim

> '' Boatanchorits ''
>
> I need  help to figure out some new meter shunts for an SB-220.,---hate to
> admit.it------
>
> Exact replacement for the original 200uA meters ,which burned up,are 
> almost
> impossibe to get.--but I do have a couple of nicely fitting meters,which
> have a 1mA 1000 Ohms/Volt movement.e.g.,they are not quite as sensitive 
> and
> require different shunts or series resistors----I can use the scales and
> housings from  the old meters  .
>
> If you have a schematic for the SB-220, I am talking about R1 and R2
> shunting the Plate Meter and the resistors that are used for the
> Multimeter,to measure Grid Current,Rel.Pwr,and H.V.. (R6 ,7,8 and R9)
>
> I am sure this has been done by quite a few poeple before and it may even
> have been published b/4 .
>
> Any help for this old guy who got his license more than 60 years ago but
> probably would not pass the test to-day,hi. ??--  If it gets too 
> complicated
> or u need the schematic,pse respond directly.
>
> Tnx Olaf,KF4TP.
>
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