Roger, just send it to STEVE. He knows his stuff.
He has a GOLD PLATED and polished 24 Karat diddle stick.
BOB DD
-----Original Message-----
From: Roger [mailto:sub1@rogerhalstead.com]
Sent: Tuesday, July 10, 2007 1:58 PM
To: rbonner@qro.com; amps@contesting.com; 'W0UN -- John Brosnahan'
Subject: Re: [Amps] Henry 2003 Filter for 20002A Amp
Thanks for the info.
>I would think the tuning on this filter would require a spectrum analyzer
>or
> other high tech devices to set properly.
>
> I wouldn't touch it unless somebody has already been diddle sticking it.
>
I bought if at a swap.<:-)) Any and alll adjustments that can be made
probably were.
> The 3002 device is completely fixed components.
>
> I'm having a bit of trouble following each reply as I've seen 2003, 2002,
> 3002, and 3003 referenced.
>
That's my typing for which I apologize and we all make our own worst proof
reader.
> But having the actual name in one post brought it home.
>
> The amps will run without the external filter if yours is screwed up.
> (DIDDLE STICKED)
> You will have to get a hold of somebody with the equipment to re-tweak it
> back in as it will require actually sweeping the thing and setting the
> attenuation points.
>
I have the spectrum analyzer...weighs more than my whole HF station
including the Alpha. I'll have to borrow a sweep generator or resort to the
old armstrong sweep method, but the real sweep generator is so much easier.
> I've never done one and Henry doesn't have anybody working anymore.
They import all of their solid state amps?
73
Roger (K8RI)
>
> BOB DD
>
> -----Original Message-----
> From: Roger [mailto:sub1@rogerhalstead.com]
> Sent: Tuesday, July 10, 2007 9:31 AM
> To: rbonner@qro.com; amps@contesting.com; W0UN -- John Brosnahan
> Subject: Re: [Amps] Henry 2003 Filter for 20002A Amp
>
> Thanks,
>
> This looks like a simple, inexpensive, and good remedy if needed.
>
> 73
>
> Roger (K8RI)
>
>
>> If you need to replace the Henry 3002 filter here is a good article
>> on a harmonic filter design with reference to the original article.
>>
>> 'Stub Filters Revisited' by John Regnault, G4SWX, Radio Communication
>> (RSGB), November 1994
>>
>> http://www.ifwtech.co.uk/g3sek/swxfiltr/swxfiltr.htm
>>
>> --John W0UN
>>
>>
>
>
>
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