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Recent content by dozer

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    Software to Monitor Bluetooth Signal-Level for Antenna Work?

    bluetooth signal hello group, I am looking for a simple, freeware, program to run in win2K and XP that will display the signal-level at the internal Bluetooth in a laptop, while we are working on antenna positioning, etc.. The abysmal 'widcomm' stack for win2k has a 'signal quality' bargraph...
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    is stub matching really required for helical antennas?

    Yes, and the same design has been in ARRL books for decades. Essentially, the last turn of the helix closest to the ground-screen is used as a tapered-line impedance-transformer. It's brought close to the screen -before- it gets around the circle to where it will connect to the coax-connector...
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    spark detector project??

    well, actually spark is caused by many other things besides "short circuit" or "high potential". Spark is caused by striking steel with flint. Spark is caused by burning limb falling to ground. etc.... as is SO common on these forums, the questioner did a very poor job of defining his...
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    Material about the design of Network Analyzer front end?

    no, i am sorry, but i looked at it years ago....i don't recall the patent number. however, i don't understand why you would have trouble finding it. just enter search-term of "vector network analyzer" or something similar; and also limit responses to those only from Assignee of "hewlett...
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    coupling coefficients in filter design

    filter cavity pdf Hello Sinatra, It would be great if you could upload those 2 papers here. A couple people -might- have the Dishal one on an old MTT CD; but it'd be nice to have it here; and also, the Cristal one will be very hard to find for most folks without an engineering-library...
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    Anybody can assist me in making Double Sided PCB?

    look for the Printed Circuit Handbook by Coombs. I think it's "Clyde" Coombs. It will tell you several different process-flows, including basic chemical makeup of baths.
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    System measuring amplitude & phase difference of 2 signa

    Re: System measuring amplitude & phase difference of 2 s you did say that the 2 signals were of the same frequency. did you mean this literally? i.e., they are the -exact- same freq? if so, i believe that a simple DBM (mixer) would give you a DC output proportional to the phase diff. between...
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    Material about the design of Network Analyzer front end?

    HP has a patent on the 8753A VNA which is something like 400 pages....includes the complete firmware source too. Go to the USPTO site to look it up. Basically, it's a multi-channel superhet with a low-IF (20 or 100 khz for example).
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    Pulse generator circuit for pulses in sub-nanosecond region

    74ac nanosecond pulse In years past, I built a number of different high-speed pulse generators; including several avalanche-xsistor based units. The #1 advantage of using avalanche pulsers is the ease of obtaining quite high output power. 24v is very marginal for avalanche circuits....you...

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