"Any new ideas on high performance preamps for 160m?? "
The only thing I can suggest is to build the front end of the
preamp as if it were a JW Miller style crystal radio, followed by the
amp itself. Yep, crystal radio. Those sets had a bandwidth of ~10khz.
Super selective and, yes, on 160m the user would have to retune often
when browsing the band. Of course, a nice feature could be automatic
tracking.
73,
Charlie, N0TT
On Tue, 23 May 2023 12:55:36 -0400 <n4is@comcast.net> writes:
> Hi Folks
>
>
>
> I am following the conversation about LOG RX antennas, I understand
> the pain
> from a noise city lot on 160m. it is hard. I am using Waller Flag's
> vertical, since 2006, and horizontal since 2010, however vertical
> noise is
> so bad with new solar panels and EV charges , on top of LED lights,
> that I
> no longer have my Vertical WF, it is inefficient for a city lot. My
> HWF is
> working very well.
>
>
>
> The reason I started a new tread is what I noticed during the last
> DX
> season. The number of KW station on 1840 is growing exponentially.
> If you
> have 100 station with 1kW on a small portion of the band, it is
> equivalent a
> 100 KW single station. Imagine 500 station, 500KW, My HWF preamp is
> in use
> since 2010, my first QSO with my 6xBF981 preamp was XU7ACY, long
> path (160m
> CW), from the same city lot, not so noise as it is today. However
> now with
> the number of FT8 KW's, and most of them very bad linearity, with
> phase
> noise several KHz on each side, my old preamp IP3 is not strong
> enough as
> it used to be.
>
>
>
> I will be back to old NORTON's preamp on my station with new high Q
> front
> end. With all the power of 100's FT8 station at the same time, the
> consideration for a new RX antenna and new preamplifier is raising
> the bar
> on overall performance.
>
>
>
> Any new ideas on high performance preamps for 160m?? We will need
> it.
>
>
>
> 73's
>
> JC
>
> N4IS
>
>
>
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