Mar 28

>How did you physically manage measuring current in closewound 2 coil>without perturbing the system? One of the people in our merry band had government connections. >With that in mind, here are my design criteria in order of importance >1 Survivability Even the efficient antenna is worthless when broken >2 Low easy replacement Sooner or later it will broken or >vandalized or you will want to improve it >3 Efficiency wish had said that, Larry…..and probably will when you arent looking o. BTW, the meters were read using binoculars. think your position is clear….

If you didnt>measure at least 7amperes into the whip to radiate watts of actual>radiated power as EM energy would be sqrt of 1002 ohms ranging to>0. 5ohms….or someplace between and amperes. Niether of these hypotheses will go far to satisfy the real objectives of our study. Our focus has always been on real world performance differences for various configurations of mobile antennas, mast lengths, coil positions, multiple resonators, mounting angles, matching devices, magnetic mount effects, vehicle footprints, grounding methods, etc. think your position is clear….

Then you said>I sqrt PR, so current into the whip you were not radiating watts as>EM radiation, and it would be 14 amperes if the whip was uniform>crosssection with base loading only and watts was radiated. Hello again, TomYou responded to my last post with some comments & question. Actually, the coil current measurements were made twice because the coil was always reversed to see if an anomaly was present in meter pickup. The objectives center on getting practical answers about practical antennas. BTW, the meters were read using binoculars.

>How did you physically manage measuring current in closewound 2 coil>without perturbing the system? One of the people in our merry band had government connections. Then you said>I sqrt PR, so current into the whip you were not radiating watts as>EM radiation, and it would be 14 amperes if the whip was uniform>crosssection with base loading only and watts was radiated. He got us dozen small calibrated RF ammeters with very small thermocouples. When the whole study is published, there will be pictures of these devices included.

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Jan 27

Precanned CW messages with looping and TtoR control. See Parts Information. It needs to be loaded by loader program, running at baud, such as EZFAST. COM. Files for making boards are available in ExpressPCB format thanks to KD7TS, and also in Gerber format. QRP 5Watt EME QSO On Ernie, W7LHL, and Larry, W7SZ, had moved their experimentation to GHz and were successful in using subaudible signals for an EME Moonbounce 2way contact. This will allow running the DSP10 at startup, using the DSPx. W7LHL suggested that 1N34 type of germanium could work also.

The ZIP file includes text file with details on the operation, DOS batch file to minimize the typing, and three PC programs run by the batch file. They were using QRP power level of 5Watts and backyard TVRO dishes of and feet. Added 05DSPx Flash Loading Program BETA VERSION This is Intel Hex loader for DSPx Flash Memory Bank that automates commands to FLASHUTL above. The manual is available online from Mikes web site. Check this out it is fine aid for the project!

16 99 R21 should be 10K not 100K this causes the gain to be dB too high. This board plugs into an interface board, the KDSP10 that comes as kit. SingleYagi, Watt 2meter EME QSO On Ernie, W7LHL, and Larry, W7SZ, were successful with PUA43 mode QSO on MHz EME Moon bounce. The display allows one to actually measure these signal levels to within dB or two. For general verification, the Tips and Measurements page. This is intended to replace the manual procedure that is fully spelled out for the program FLASHUTL.

The display allows one to actually measure these signal levels to within dB or two. Many thanks to Jimmy and Lyle KK7P for much assistance with this aid. This ZIP file includes details on the operation, along with DOS batch file to minimize the typing. They can be accessed from the qth. net Web Site. The path is about miles, home stationtohome station, with number of hills in the way. Details such as the configuration file setup are covered in detail. This has been useful and fun tool for exploring propagation paths.

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