Peter Chadwick wrote:
>
>Rich said:
>
>/\ no. the Collins 30S-1 is AB1 cathode driven.
>
>I'd forgotten that one. Not sure you can really call it grounded grid, though,
>since the grid is grounded through 220pF so that feedback can be applied.
>
It still fits into the broad classification of grounded grid. After all,
when a grid-driven amp has a small amount of cathode resistance, we
still call it grounded-cathode.
>
>For some reason, the term 'grounded grid' always for me conjures up visions of
>6AK5-6J4 Wallman cascode circuits in 2 metre converters back in the days before
>Nuvistors.....there's age for you!
>
Peter has an unfair advantage over some of us slightly less old-timers.
He was licensed in utero.
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.com/g3sek
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