[GreenKeys] ARRL Handbook TU Limiter Circuit wanted

[Alf Fisher]

Hi folks,

Please can someone find me a scan of the the input Limiter circuit used 
in a TU in an ARRL handbook - probably around 1955 to1960.

It uses a double triode (6SN7 or 12AU7) with its cathodes connected 
together and the output is taken via a transformer.

I have an article that claims to use that circuit but the there are 
errors in the drawing such as the grid of the right hand half isnt 
connected to anything and the transformer secondary feeds mark and space 
filters via pot (presumably for balancing) but there are no terminating 
resistors so the pot wont do anything.

73,
Alf
G3WSD