Dave Schmarder's 2009 Crystal Set Contest Entry

Loop antenna converted to a crystal radio

My location:   N 42 15 3    W 76 57 5, Beaver Dams, NY 14812


http://www.schmarder.com/radios/loops/loops3.htm

Loop Class Entry

Schmarder Loop Schmatic

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Comments

I sure like these January contests. They last long enough so that not only do I get enough time to log stations, but the conditions vary enough to allow different areas to come in. This year I decided to use my crystal radio loop exclusively. Last year I made some improvements, including changing the wire for large litz, and using an Überformer. I used this modified loop in the Sprint contest last September. I knew then I would have to use this loop during the full contest. There are not much contestants in the loop class, but very worthy competitors none the less.

After picking the low hanging fruit over the first couple of days, it was time to get down to business. My best reception was achieved when the furnace circulation pump, humidifier, and refrigerator were not running. It has to be very quiet to hear those weak stations.

To spot the frequencies, I used my DDS signal generator. Listening to the right frequency is essential. Once the frequency is spotted, the generator is turned off and the listening begins. Since I have been in a bunch of these contests, knowing where and when to listen increased my efficiency. I pretty much knew what I was listening to, most of the time. It was a matter of waiting for the ID or other clue to confirm the station heard.

A day into the contest made me realize that a Selectivity Enhancement Circuit was needed. Loops tend to be low Q, even with larger litz. So the tuning was still somewhat wide. The SEC helped a lot. I may modify my loop to add a knob adjustable capacitor as adjusting this capacitor according to frequency was necessary.

It was a good contest. I want to thank Jack Bryant for making some small rules adjustments. Changing to local time helped me avoid logging errors. I am looking forward to the 1AD contest coming up in February.

I encourage others to build a crystal loop radio and join in on this. Who would have thought that thousand mile reception was possible using a loop.

Entry
#   Time(EST) Call  Freq  Location   Distance(km) Power(kW)  Points 
Jan 16, 2009
001  1042    WEHH   1600  Horseheads, NY     18      5        200 
002  1045    WFLR   1570  Dundee, NY         33      5        200  
003  1047    WRCE   1490  Watkins Glen, NY   13       .4      200
004  1138    WENI   1450  Corning, NY        17      1        200 
005  1139    WELM   1410  Elmira, NY         19      5        200
006  1141    WCBA   1350  Corning, NY        17      1        200  
007  1143    WENY   1230  Elmira, NY         24      1        200
008  1144    WPIE   1160  Ithaca, NY         38      5        200 
009  1145    WLNL   1000  Horseheads, NY     14      5        200 
010  1148    WHCU    870  Ithaca, NY         31      5        200
011  1149    WYLF    850  Dundee, NY         48      1        200
012  1150    WWLZ    820  Horseheads, NY     14      4.1      200 
013  1151    WINR    680  Binghamton, NY     92      5        341 
014  1152    WHEN    620  Syracuse, NY      112      5        303
015  1944    WHKT   1650  Portsmouth, VA    608      1       2026
016  1946    WWRU   1660  Jersey City, NJ   288      1        960
017  1950    WPTX   1690  Lexington Pk,MD   442      1       1473
018  1954    WCKY   1530  Cincinnati, OH    736     50       1566 
019  1956    WQEW   1560  New York, NY      305     50        649 
020  2004    WJAS   1320  Pittsburgh, PA    320      5        865 
021  2006    WERE   1300  Cleveland, OH     410      5       1108 
022  2007    WWVA   1170  Wheeling, WV      302     50        643 
023  2003    WHKW   1220  Cleveland, OH     651     50       1385 
024  2010    WRVA   1140  Richmond, VA      540     50       1148 
025  2050    WBBR   1130  New York, NY      290     50        626 
026  2056     WBT   1110  Charlotte, NC     862     50       1834 
027  2058    WTAM   1100  Cleveland, OH     402     50        856 
028  2100    WBAL   1090  Baltimore, MD     320     50        681 
029  2101    WTIC   1080  Harford, CT       365     50        737 
030  2102     KYW   1060  Philadelphia, PA  278     50        592  
031  2104     WBZ   1030  Boston, MA        500     50       1064 
032  2108    WMVP   1000  Chicago, IL       912     50       1941
033  2109    CFRB   1010  Toronto, ON       259     50        551
034  2114    CINW    940  Montreal, QU      436     50        928
035  2124    CHML    900  Hamilton, ON      285     50        607
036  2126    WCBS    880  New York, NY      305     50        650 
037  2128    WHAS    840  Louisville, KY    844     50       1796 
038  2129    CKLW    800  Windsor, ON       499     50       1062 
039  2132    WBBM    780  Chicago, IL       913     50       1943 
040  2133    WABC    770  New York, NY      284     50        604 
041  2134     WJR    760  Detroit, MI       516     50       1098 
042  2135     WSB    750  Atlanta, GA      1096     50       2232  
043  2136    CFZM    740  Toronto, ON       276     50        587 
044  2139    CKAC    730  Montreal, QU      434     50        923  
045  2140     WGN    720  Chicago, IL       914     50       1944 
Jan 17, 2009
046  0039    CMLC    710  Victoria Tun CU  2372     10       5930 
047  0045    CINF    690  Montreal, QU      436     50        928  
048  0050    WSCR    670  Chicago, IL       918     50       1953  
049  0053    WFAN    660  New York, NY      305     50        646 
050  0055     WSM    650  Nashville, TN    1096     50       2333 
051  0109    CJBC    860  Toronto, ON       276     50        587
052  1639    WWRL   1600  New York, NY      290     25        659 
053  1643    WTWP   1500  Washington, DC    357     50        759 
054  1755    KDKA   1020  Pittsburgh, PA    313     50        666
Jan 18, 2009 
055  2158    WFIL    560  Philadelphia, PA  278      5        751                 
056  2204    CFOS    560  Owen Sound, ON    408      5       1103 
057  2207     WIP    610  Philadelphia, PA  307      5        830 
058  2211     WLW    700  Cincinnai, OH     736     50       1487 
059  2214     WOR    710  New York, NY      288     50        613
060  2217    CMEA    570  Santa Clara, CU  2218     30       4954 
061  2221     WGY    810  Schenectady, NY   248     50        528 
062  2224    CMNB    870  Pilon, CU        2487     10       6217  
063  2243     WLS    890  Chicago, IL       904     50       1925 
064  2305     WWL    870  New Orleans, LA  1814     50       3860 
065  2352    WEVD   1050  New York City     289     50        615 
Jan 19, 2009 
066  0001    KMOX   1120  St. Louis, MO    1174     50       2498  
067  0012    WTTM   1680  Princeton, NJ     279      1        930 
068  0016    WWKB   1520  Buffalo, NY       165     50        352 
069  0020    WCTC   1450  New Brunswick, NJ 285      1        950 
070  1655    WNYY   1470  Ithaca, NY         42      1        200 
Jan 20, 2009   
071  1916    WPHT   1210  Philadelphia, PA  301     50        641  
072  2120    CJBK   1290  London, ON        357     10        892
073  2134    WMBS    590  Uniontown, PA     354      1       1180 
074  2146    WINS   1010  New York, NY      286     50        609 
Jan 21, 2009
075  2046    WLIB   1190  New York, NY      289     30        641  
076  2052    WEAE   1250  Pittsburgh, PA    325      5        878 
077  2108    WFBL   1390  Syracuse, NY      118      5        319 
078  2120    WNSW   1430  Newark, NJ        283      5        765 
Jan 22, 2009 
079  2031    CKNX    920  Wingham, ON       399      1       1330       
080  2044    WTEM    980  Washington, DC    366      5        989 
081  2104    CMBE    950  Arroyo Arena, CU  2195     5       5934
082  2110    CMJD    960  Stgo De Cuba, CU  2474     1       8247
083  2116    WDCX    990  Rochester, NY      132     2.5      388 
Jan 23, 2009   
084  0049    CHUM   1050  Toronto, ON       257     50        547
085  0100    WADO   1280  New York, NY      287      7.2      744
Jan 23, 2009 
086  1931    CMBB    790  Guanabacoa, CU   2184     50       4648
087  1947    WHAM   1180  Rochester, NY     112     50        238 
088  2001    CHTO   1690  Toronto, ON       250      1        833  
089  2125    CIAO    530  Brampton, ON      281      5        598 
090  2146    WMAL    630  Washington, DC    224      5        605
091  2154     WHO   1040  Des Moines, IA   1355     50       2884
092  2207    WICC    600  Bridgeport, CT    337       .5     1248 

Claimed Score ------------------------------------------    ------
                                                           115555
Statiions heard: 92
Stations ID    : 92
Stations NO ID :  0