Good deal!
Its not far removed from my homebrew receivers.
I DO tune the input network separately, but its broad banded enough to where
I don't need to retune it much, only large frequency or band jumps need
retuning.
I did separate the osc and mixer tubes, used a good 455khz filter, and did a
little more with the AGC and a low distortion detector, but the basic
circuit is the same.
I have pushed the design up to 40 meters with very good results.
When you consider the table top radios had no real antenna, they can work
amazingly well when you use a good antenna on them. There is no lack of
gain!
Brett
N2DTS
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[email protected]>
Sent: Monday, October 27, 2008 12:28 AM
Subject: [AMRadio] 160m AM receiver project
My 160m AM receiver project is done. It was based on parts from a
Zenith 5-tube broadcast radio (actually the same model as our family
kitchen table radio when I was a little kid) but I pulled variable cap
plates and
added a few parts to move it up to 160m and create a better band-spread
across the dial. I was also able to get a double-humped response on the
antenna tracking and avoid the need for a front panel antenna trimmer
control.
http://www.wd8das.net/160mRX/160mRX.html
The picture of the front panel was snapped at the moment it was receiving
one of the crew on 1985 kHz. The signal was about S9+15dB on my other
receivers.
Steve WD8DAS
[EMAIL PROTECTED]
http://www.wd8das.net/
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