Topband: Two 2:1 transformers to choose from!!

[Charlie Cunningham]

I'm sure that's a good one, Mike.  When I built my RX loop, I was busy and
In a hurry, and I borrowed one of the old original AMECO tube preamps from
my friend, Bill, K4CIA. Worked great on 160,80, 40 and 30m with the
terminated loop. The AMECO preamp was tunable, rather than broad band.

 

73,

Charlie, K4OTV

 

From: Mike Waters [mailto:mikewate at gmail.com] 
Sent: Thursday, August 22, 2013 10:41 PM
To: Charlie Cunningham; topband
Subject: Re: Topband: Two 2:1 transformers to choose from!!

 

This is the preamp I use. The circuit is from Solid State Design For the
Radio Amateur, C 1977 ARRL. W8JI suggested it to me over 30 years ago (but I
think he has much better preamp designs since then). 
http://www.w0btu.com/W0BTU-broadband-preamps.html

W7IUV enhanced it.

 

73, Mike
www.w0btu.com

 

On Thu, Aug 22, 2013 at 9:25 PM, Charlie Cunningham
<charlie-cunningham at nc.rr.com> wrote:

Well, that FO0AAA KAZ terminated loop has pretty good gain as terminated RX
loops go, so I wouldn't expect the system to be noise starved, but the gain
opf that loop is of the order of -30 dBi at 160, so a preamp is in order.