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Contest-grade double-tuned crystal radio set

Ernst Erb Jürgen Stichling Bernhard Nagel 
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Forum » Technique, Repair, Restoration, Home construction ** » Home construction and general radio technique » Contest-grade double-tuned crystal radio set
Dejan Momirov
Dejan Momirov
RS  Articles: 33
Schem.: 3
Pict.: 120
24.Feb.12 19:53

Count of Thanks: 5
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Dear RM,

In 2004 I made an crystal radio and joined the Enver Memorial Contest. The set performed so good, that I decided, now beeing member of RM, to share it with others. As attachment I send also some pcs, shematics and the contest-log.

This is the first time I bring something to the Forum, so excuse me if I have made some mistakes.

Best regards,

Dejan Momirov


EE: 26.2.12: Doc file deleted - I could not open and others believe there is a "orm" or virus.


This article was edited 26.Feb.12 18:44 by Ernst Erb .

Ernst Erb
Ernst Erb
CH  Articles: 5589
Schem.: 13736
Pict.: 30895
25.Feb.12 21:22

Count of Thanks: 7
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Dear Dejan
Well done, gratulations!
What I can't open is the last attachment: Contest Set Description.

Here you can see an other very fine crystal detector - but the article is in German - but you see interesting pictures. It is the best I know of ... Most important are the circuits ... besides naturally antenna and earth ... (place, time, season, sun activity etc.)

Dietmar Rudolph
Dietmar Rudolph
D  Articles: 2188
Schem.: 807
Pict.: 453
27.Feb.12 09:53

Count of Thanks: 6
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Dear Dejan,

Under Linux with Libre Office it was possible to open the Contest Set Description .doc file and to convert it to a .pdf file. However, after this the PC crashed!? Therefore probably something may be suspicious with your .doc file. 

Contest Set Description



Robert Weaver
CDN  Articles: 33
Schem.: 12
Pict.: 11
27.Feb.12 10:29

Count of Thanks: 7
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Nice work Dejan, At some point I'll have to try building one of these.


BTW, I had no problem opening the original .doc file with Open Office on my Macintosh computer.

This article was edited 27.Feb.12 10:32 by Robert Weaver .

Dejan Momirov
Dejan Momirov
RS  Articles: 33
Schem.: 3
Pict.: 120
13.Mar.12 19:05

Count of Thanks: 7
Reply  |  You aren't logged in. (Guest)   5


I would like to ad some more data about this set: The set description (I understand that there were problems opening it) and the contest results.