Hi Bill
The formula for determining the input impedance
for a triode operated in grounded grid is given in
the Bill
Orr handbooks. In the 21st edition on page 7.18.
In the 23rd edition (newest one)on page 15-14.
There is also a list of operating parameters
(including drive impedance) for some of the more
popular triodes operated in GG on page 15-18 in
the 23rd edition.
Hope this helps.
Paul
Paul Hewitt
WD7S PRODUCTIONS
QRO HOMEBREW COMPONENTS
http://wd7s.home.att.net
> -----Original Message-----
> From: owner-amps@contesting.com
> [mailto:owner-amps@contesting.com]On
> Behalf Of Bill Coleman N2BC
> Sent: Thursday, May 24, 2001 8:28 PM
> To: amps@contesting.com
> Subject: [AMPS] Input impedance
>
>
>
> How does one determine / calculate the
> input impedance in a cathode driven
> GG circuit? A pointer to a book /
> article would be great.
>
> THX, Bill
> * * * * * * * * * * * * * * * * *
> Bill Coleman N2BC
> http://home.stny.rr.com
>
>
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