Sounds fantastic to me!
Of course, there is an option---use two 4-1000 in paralell, that lowers the
input impedance to 50 ohms.
It has been done.
Paul K0UYA
----- Original Message -----
From: <n1wr@chesapeake.net>
To: <amps@contesting.com>
Sent: Thursday, October 23, 2008 12:03 PM
Subject: [Amps] Amplifier Input Circuit Consultation
>I continue to work on the design/construction of my 4-1000 amplifier. I'm
> working on the input network details.
>
> The 4-1000 has a generally accepted input impedence of 100 ohms. So I am
> planning on using a 2:1 step up unbalanced to unbalanced balun followed by
> a parallel tuned circuit, Q of 2-3, for each band. Taking this approach I
> will need only one relay contact per band to switch each tuned circuit (as
> opposed to two needed to switch a pi network).
>
> In all of my reading and research I haven't seen this approach taken. The
> grid compartment is under construction. Before I go ahead and construct
> the input this way - can anyone come up with a reason this won't work?
>
> I thoroughly enjoy this list and faithfully tune in to the goings on. I
> really appreciate the help and support that is provided.
>
> Wayne N1WR
>
>
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