[Amps] Henry 2003 Filter for 20002A Amp

[Mike Krzystyniak K9MK]

Roger,

   Understood.  My Henry 2002-A has the smaller filter box on the back wall.
It is not a strip line but discrete coils and caps.  I recall 7-9 elements
and when I swept it once it was flat through 200 Mhz and then dropped like a
rock (possible zero) around 300 MHz and higher... I suspect the 3002 filter,
along with its obvious power handling advantage would have similar swept
characteristics with slightly lower loss.

   I did see tuning notes for the 432 filters but I do not recall seeing
anything for the 2M filters.  Hopefully someone on here has the information
in their archives.

73's  Mike k9mk/5





-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]On
Behalf Of Roger
Sent: Tuesday, July 10, 2007 9:16 AM
To: Mike Krzystyniak K9MK; Amps Amps
Subject: Re: [Amps] Henry 2003 Filter for 20002A Amp







> Roger,
>
>  Are you talking about the harmonic filter bolted to the back wall of the
> 2002A amp?

Yes, it measures 10 1/2 X 4 X 2 1/2, the top is perforated metal with a
tunable stripline inside. It's bolted to the inside back wall of the amp.
Although there is a note in the manual as to the 3003 filter, it's the
FL1-2002A rather than the external 2003 which as Bob mentioned is the first
thing to get lost.  This was part of an estate and they probably didn't know
what that big box was.  I'm assuming the 2003 is probably a good idea?

73

Roger


>
> Mike K9MK/5
>
>
>
> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com]On
> Behalf Of Roger
> Sent: Tuesday, July 10, 2007 2:38 AM
> To: Amps Amps
> Subject: [Amps] Henry 2003 Filter for 20002A Amp
>
>
> I picked up a 2002A 2-meter amp at a local swap and it works well. (Looks
> good too).
> It has the optional 3002 filter installed but there is no mention of it in
> the manual other than a note that its been installed.
> I'm looking for information on the construction and tuning of this filter.
> A few hours of searching archives  and Google has only turned up
> references
> to the name, but no real information.
>
> 73
>
> Roger (k8RI)
>
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>
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