[600MRG] New RadioTelegraph License

[sbjohnston at aol.com]

Thank you.  I wrote an article for QST on the Chinese 222-1 receiver.  It is posted on my website at ...

 
http://www.wd8das.net/222-1.pdf

 
It is a sort of hybrid of many of the late tube designs and performs very well.  I do wish it went lower in frequency coverage, though... Many military and government receivers seem to stop at the top of the AM broadcast band - I think it was an attempt to keep operators who were supposed to be monitoring frequency xxxx from instead listening to their favorite broadcast station.

Here's a higher-resolution photo of the receiver...

http://www.wd8das.net/222-1hires.jpg

And here's the schematic...

http://www.wd8das.net/222-1schem.pdf



Steve 

sbjohnston at aol.com
http://www.wd8das.net/
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-----Original Message-----
From: D.J.J. Ring, Jr. <n1ea at arrl.net>
To: sbjohnston <sbjohnston at aol.com>
Cc: 600mrg <600mrg at w7ekb.com>
Sent: Tue, May 21, 2013 12:32 pm
Subject: Re: [600MRG] New RadioTelegraph License


http://www.500kc.com/Hello Steve,


It could not belong to a more deserving person, you have made wonderful contributions to the radio art wherever you have gone.


If you would, please tell me what the beautiful receiver is that is on your home page http://www.wd8das.net/.  If you made it, please share with us some of the design characteristics, because knowing you it has got to have some innovative detection, amplification and audio stages that have to be used to be appreciated.  I have just 
found out what it is:  Chinese 222-1 military HF receiver 1.5 - 30 MHz http://www.flickr.com/photos/32025136@N03/sets/72157612685315728/ too bad it doesn't include 600 meters and up.


73


David J. Ring, Jr., N1EA  WD2XSH/18 
Radio-Officers Group -- Join CW email list -- Historic Morse Recordings 
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