[Amps] tank calculations - need input

[chuck]

I'm going to move the inductance up into the low 7's tonight and see where
C2 works.
I'm sure a good look at a scope will also let me know whats going on, I may
have something else Happening not being detected in the
circuit..oscillations noies what not.

Chuck




-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of DF3KV
Sent: Sunday, October 18, 2009 9:02 PM
To: amps at contesting.com
Subject: Re: [Amps] tank calculations - need input

Yes, a Q of 7 is OK at that impedance if harmonics at only -24db are
acceptable.
Multi-Op stations are more interested in -35 to -40db.
With such low Q one should make use of Pi-L.

73
Peter

-----Original Message-----
From: jeff millar [mailto:jeff at wa1hco.net]
Sent: Montag, 19. Oktober 2009 02:43
To: DF3KV
Cc: amps at contesting.com
Subject: Re: [Amps] tank calculations - need input

If you want a Q of 12, values of about 430pf, 4.6 uH, 1900 pF do work.

But you really only need a Q of about 7 to comfortably match 1000 Ohms to 50
Ohms.  The Q of 12 rule was created in the days of higher impedance tubes.

jeff, wa1hco