[Lowfer] Re: AMRAD Probe antenna part needed

James M. Walker chejmw at buffalo.edu
Wed Jun 11 07:28:52 EDT 2008


Have you considered the IFI series of wide-band amplifiers?
I tested the 500 model, because I had one, at 500 KC very good
response, also works up into the Amateur ranges. Oh yes and also
it has tubes in it, 6AK5s.
Jim
WB2FCN

----- Original Message ----- 
From: "Chris Trask" <christrask at earthlink.net>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Tuesday, June 10, 2008 9:55 PM
Subject: Re: [Lowfer] Re: AMRAD Probe antenna part needed


>    You'd be surprised how easy it is to make good amplifiers out of cheap
> parts.  I have a 6dB gain lossless feedback amplifier here using the BFQ19
> that has an OIP3 of +54dB.  Dallas Lankford and Kiwa are going to have a
> heart attack over that one.
>
> Chris
>
>     ,----------------------.       High Performance Mixers and
>    /    What's all this     \    Amplifiers for RF Communications
>   / extinct stuff, anyhow?  /
>   \  _______,--------------'           Chris Trask / N7ZWY
>  _ |/                                  Principal Engineer
> oo\                                  Sonoran Radio Research
> (__)\       _                             P.O. Box 25240
>  \  \    .'  `.                     Tempe, Arizona 85285-5240
>   \  \  /      \
>    \  '"        \                 IEEE Senior Member #40274515
>     .       (  ) \
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>
>                       Graphics by Loek Frederiks
>
> ----- Original Message -----
> From: "Johan H. Bodin" <jh.bodin at telia.com>
> To: "Lowfer list" <lowfer at mailman.qth.net>
> Sent: Tuesday, June 10, 2008 1:31 PM
> Subject: Re: [Lowfer] Re: AMRAD Probe antenna part needed
>
>
>> Thanks Chris!
>>
>> Nice work!
>>
>> 73 Johan SM6LKM
>>
>> Chris Trask wrote:
>> >      The details for this amplifier can be found at:
>> >
>> >      http://tinyurl.com/2gkndh
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