There seems to be some confusion about.
Let me explain the significance of Joel's comment about the high impedance
amplifiers. I have developed new versions of the Hi-Z amplifiers I use in the
Hi-Z array products. Joel W5ZN was given a set of these Hi-Z amps as a Beta
test in the field for my new design. The whole purpose of one version (-6dB
version) was to replace any of the really old amplifiers sold with the early
arrays and to retrofit directly into the YCCC arrays. The new design has
several advantages including Low Noise, more gain/phase accuracy, lower cost,
and higher IMD specs compared to our older amps.
8 of these amps were also given to Eric NO3M for a beta test in his 630
meter 8 circle receiving array to replace the YCCC designed amps. I am happy to
say they participated in his recent record 630 meter contact to VK4.
There is also another version called the Plus V2 version that has 6 dB more
gain and will replace the current version in most new arrays and production as
time goes on.
The amps have been submitted to DX Engineering and will show up in their
offerings soon.
Sorry for the shameless plug but some information was needed.
Lee K7TJR OR
-----Original Message-----
From: Topband <topband-bounces+k7tjr=msn.com@contesting.com> On Behalf Of
w5zn@w5zn.org
Sent: Sunday, March 1, 2020 9:52 PM
To: topband <topband@contesting.com>
Subject: Re: Topband: YCCC 9 Vertical Array Preamplifiers
Allow me to clarify my post. I was referring to the high impedance amplifiers
at the vertical elements, not the 2N5109 preamp used sometimes post combiner.
73 Joel W5ZN
On 2020-03-01 20:27, w5zn@w5zn.org wrote:
As an alternative to the 2N5109 preamps, last year I acquired a set of
HiZ preamps to use on my YCCC 9 Circle array elements. They work
exceptionally well and exhibit a lower noise figure that I experienced
with the original YCCC amps.
I mentioned this solely for information with no other purpose as I
realize some like to use a simpler amplifier design that they can
build and/or repair. If you have an interest other than what has been
mentioned you can contact Lee at HiZ.
73 Joel W5ZN
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