| Home |
| Search |
| Today's Posts |
|
#17
October 20th 03, 12:49 AM
|
|||
|
|||
Richard Clark wrote in message . ..
On 12 Oct 2003 03:24:10 GMT, oSaddam (Yuri Blanarovich) wrote: Art Unwin, KB9MZ wrote: "The markings are 3600 - 5000 KC." It was used in a radio or transmitter operating in that range. (German WW II SK10?) Yuri Hi Yuri, More probable is Marine DF. 73's Richard Clark, KB7QHC After digging into this subject so that I fully understand it I found that this particular antenna did not work as it should have done. This 'dummy' assumed that I could obtain any Q that I wanted, however actual inductor was very inefficient for top band use ( very broadbanded because of losses.) I went from 4 inch diameter inductance windings to a 12 inch o/a diameter with 0.6, O.D. copper tubing for a total length for the inductor of 35 inches. My intention is to now flatten the copper tubing so the edges to provide minimum interwinding capacitance. However I do want the maximum Q available so the antenna is narrow banded and inductance change is made by lessening the inductance length for moving around the band.( or possibly the insertion of a brass rod) What other options do I have for increasing Q other than silver plating of the copper? I opted away from LITZ wire as I figured that top band was too high a frequency to benefit from its properties. Any comments or discussion of the subject would be very apreciated Best regards Art |
Threaded Mode
