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question about wi-fi routers Aug 15th, 23:28 4 129 1 week, 1 day ago
ghz loop yagi calculator Aug 15th, 23:15 2 57 2 weeks, 5 days ago
Local Eoc (in case the web goes down) Round The Block Net Need Dirt Cheap Wireless Microphones! Jun 16th, 21:34 5 220 on 6/7/15
Resistors as Chokes Jun 9th, 18:01 3 198 on 9/6/15
Analog Atomic Wall Clock With Silent Second Hand No Battery May 19th, 19:35 5 419 on 11/6/15
Linked Routers Jan 8th, 00:13 2 308 on 4/3/15
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mast mounted bi-amp Jun 10th 2013, 23:17 3 782 on 18/6/13

Latest Posts

Topic Author Posted On
question about wi-fi routers WD6EJN 1 week, 2 days ago
Since I am just receive one (wide digital) channel and don't care about having the full duplex capability of the router.
Can I just have a digital receiver pick up the wireless microphones around the block then discriminate the ifs' for use as voice overs on an lpfm (not part 15) radio station then rather then needing the (what I assume is a full duplex) uplink transmitter of the router?
P.S. I haven't finished many projects in the last ten years or so!! I can dream can't I.
question about wi-fi routers WD6EJN 2 weeks, 6 days ago
I don't really know much about routers or computers, but how is it that they are able to have so many users on one Wi-Fi channel?
Does each user have assigned to it another channel? or frequency.
The reason I am curious, I have been wanting to have a neighbor eoc or neighborhood watch using low power transmitters probably wireless microphones that just go around the block.
I am used to hearing more then one ssb signals around a frequency much like a contest or pile up although having to tune each signal to clarify.
I am guessing that more then one digital signal can occupy the same frequency, this would be perfect for my use as in a conference call situation without heterodynes as in am or cb.
ghz loop yagi calculator WD6EJN 2 weeks, 6 days ago
I have lived in apartments and have had antenna restrictions for many years, never getting on low bands with an occasional repeater contact.
I think I could bounce signals off buildings if I could build loop yagis.
I built the 1295 loop yagi as in the arrl handbook but this did not include technical info for other frequencies, you know enter the diameter of element, frequency, gain, etc. I couldn't afford a transceiver so I never found out if it worked.
Although I have built many quad and linear element yagis using quad or yagi calculator on the internet, I have not been able to find a loop yagi calculator for ghz frequencies.
Local Eoc (in case the web goes down) Round The Block Net Need Dirt Cheap Wireless Microphones! WD6EJN on 6/7/15
Quote by W1VT
How a TV News Live Truck Works! #StormKING

They use a mast nearly 50 ft tall to get the distance.

Zack W1VT
ARRL Senior Lab Engineer

I just want to know where they get their wireless microphones without receivers, if I could find a Ramsey Electronics that sold a fm handie talkie kit, we could just build the transmitters and every one would have to get ham licenses no big deal.
I can't remember the newscasters name right now, but when she extended the mast it went right into a power pole, her face was pretty messed up and she barely survived.
Local Eoc (in case the web goes down) Round The Block Net Need Dirt Cheap Wireless Microphones! WD6EJN on 28/6/15
Quote by WA0CBW
Yes you need a license for GMRS. For the most part there are very few frequencies that don't need licenses (MURS/FRS/CB). You may be a bit confused about "wireless microphones". Microphones don't transmit but the transmitter they are connected do. So a one watt microphone is really a one watt transmitter and depending on the frequency it uses would require a license. Also, wireless microphones need an antenna for the frequency they are using. The higher the frequency the shorter the antenna. The FCC regulates frequencies and what can be used on each frequency as well as the power levels. Have you looked into "stealth" ham antennas? There are many designs available for those whose locations are "antenna challenged".

Wouldn't one assume if there is no wire attached it is a wireless microphone!, a lot of them are attached to belt clips with lavelier mics much like hand held without receivers, but cost over $300.00, most of the new ones that you see have the cube at the bottom which I assume house the battery, but I think these would only put out 50 millitatts.
It seems like an impossible task but the group I would start would just have to obtain ham licences no one would go for this!, frs might work with a pl tone, but I still have to have a roof mounted beam (channel 15 yagi with 30db preamp).and at least a stacked pair of moon bounce beams.
I have tried many "stealth antennas" for ham radio over the years, but there is so much surveillance by neighbors wherever I had to live that even a 30 gauge wire does not go unnoticed.
The reason I have decided on wireless microphones is no one on the block is going to pay the price for a gmrs radio and license unless there was some sort of huge donation.
I have seen some remote shots on movies and tv news that are really far away! they must use a huge dish or yagi to pick up the signals.

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