Tek Part - T-21A1


Rajesh VS
 

Hey All,

Came across this vintage Tek part, which is in octal tube type package, marked as "Tektronix T-21A1"
Looks like some sort of transformer, anyone here knows more about it?

Pics here
https://groups.io/g/TekScopes/album?id=90313

Thanks in advance,
Rajesh

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