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Latest Topics

Topic Created Posts Views Last Activity
"Faraday Telescope" Oct 21st 2019, 18:10 1 2,729 on 21/10/19
ham open club wi fi Oct 15th 2019, 12:21 4 2,469 on 11/4/20
Facebook Hams May 17th 2016, 18:51 1 2,651 on 17/5/16
HTX-202 back up battery Mar 22nd 2016, 20:49 4 5,811 on 30/3/16
ghz frequency loop yagis Feb 9th 2016, 00:53 6 3,077 on 19/2/16
Using wi-fi routers ("mesh system" 2012? qst) Oct 3rd 2015, 19:07 3 6,507 on 21/2/18
question about wi-fi routers Aug 15th 2015, 23:28 4 5,897 on 27/8/15
ghz loop yagi calculator Aug 15th 2015, 23:15 2 2,926 on 16/8/15
Local Eoc (in case the web goes down) Round The Block Net Need Dirt Cheap Wireless Microphones! Jun 16th 2015, 21:34 5 2,994 on 6/7/15
Resistors as Chokes Jun 9th 2015, 18:01 3 2,832 on 9/6/15

Latest Posts

Topic Author Posted On
"Faraday Telescope" wd6ejn on 21/10/19
Almost two decades ago I started fashioning long loop yagis with information I got (see my other post re wi fi loop yagi) on the internet (loop quad or loop yagi calculator)as a unwilling abused neighbor I spent most of these years devising stealth antennas to hide outside.
Even a thirty gage wire can arouse suspicion in many busy bodies, and I'm not just talking about hoa's if you rent in one of these stalig 13s
you can have an all out battle as "you have no rights" to join in any activities as home owners do.
So I decided to avoid the "inconvenient bands" (hf) and build indoor antennas to beam out skylights or on a balcony no luxury of an attic in an apartment.
My latest experiment is a 20 foot long 70 centimeter loop yagi having just over 20 (approx 12" spacing or less) directors as I have exactly 20 feet from sliding door balcony to front door.
I decided to use a very small gage wire of 30 gage memory wire wich
is silver plated so that I can use an extremely high gain tunable (432-435 mhz) radio telescope (hopefully under 100$) preamp with cor relay less then 10 watts for weak signal work.
I'm really not interested in traditional dx contacts and hope to have a following of local hams interested in cw.
It looks as if the 30 gage driven element will be spaced extremely close to the 1st and second directors and reflector as the influence on them seems almost nonexistant, I don't know how this will effect gain.
As sites such as ssb electronics and Down East Microwave also Ramsey Electronics have disapeard, I am having hard time Google searching for a preamp to compensate for the db loss from the faraday cage of a tiny apartment, I'm talking about 100 db gain and < 1 noise figure.
I had no luck at all with the silver plated "memory wire" Itossed it in with the 1-800-junk stuff!
So, since the 20 + directors and reflector loop are 1/4" wide and 9-10" diameter, I decided to make the the driven element the same and copper to solder to I wonder how much difference it would make if the driven element was sterling (no I'm not going to swipe car exausts or antique stores) silver less then 1/4" wide .
It appears that when I was tuning the memory wire I must have forgot to solder the ends of the open end of the loop back, making the resonent frequency go away together, now I have 1.1-1 from 432 to 435 mhz, emulating the mfj swr anylizer for a high radio telescope preamp which I have not found yet, all I have is an old Radio sShack scanner which is useless and all I hear is a lot of noise (probably 40-50 noise level and nothig else let alone anything on 70 cm sub band.
I was forced to move some distance from here and was able to place less then half the loops (10 or so?) and tried to have 432-449 mhz.
the signals from repeaters are so strong this did not work so I am going to look up repeater input frequencies and 432 MHz weak signals.
When I had the 20 foot loop yagi inside the apartment I used the 100 uwatt? signal as a sort of beacon,, to my surprise I actually heard the signal from the mfj antenna anylizer about a quarter of a mile away actually threading through buildings and alleys!
I was up about 20 feet on the second floor.
The rules re motif pronounced motif! are more strict re indoors so I had to put the yagi on a balcony, I also use a stearling silver wire (22 ga) and it tunes great but still can't hear anything.
I'm thinking now of just making a corner reflector and using the stirling silver loop, the turning radius will be limited but it seems that a corner reflector should work a lot better.
I have searched endlessly for something a lot smaller (probably 8 feet on each side and 90 degree angle with no luck, everything is the same.....a lot of real estate or nothing.
So, now that the yagi boom has been reduced to 8 feet (I hide it under the edge of the upper balcony eave, (I am using the same 2" diameter pvc mast for my 95 year old mother's hdtv antenna, so when I want to try to hear a 70cm signal from a handie talkie on the input of a repeater, the hdtv signal usually goes away! I tell her its just the weather) I am going to see if I can find a roll of pure silver or gold for the loop elements as I figure I can always recycle what's left I have been using aluminum foil cut with a paper circle cutter and the aluminum does not seem to work with anything less then 20 feet as the indoor antenna, although there was that cool happening with the uwatt signal going almost 1-4 mile.

ham open club wi fi wd6ejn on 21/10/19
It's already about 5 feet long! I must have 20 loop elements on it, but the signal goes away when I use the inboard antenna.
No one else can get this network on a smart phone or laptop!
I seem to know what I am doing when it comes to antennas although not this.
I added 10 more 30 millimeter diameter (d 21-d 30) copper loops and made the spacing closer probably a mistake, now the signal is even harder to find, could be adding another wall and scaffolding increased the value of my faraday shield/cave.
What I really need now is a tp link repeater/extender with a 50 foot ethernet wire brown color to match the outside wall, I want on e with a n aux antenna jack so I can make one of my invisible beam.

ham open club wi fi wd6ejn on 15/10/19
I have been using wi fi for several years now as I can not afford cable or cell phone.
A building went up recently (see google earth) between me and wi fi.
Although I can still see the wi fi network !! on my tablet, the signal may be coming through the ac line (bpl) but I don't know and the other hams don't know either they all have smart phones.
I have seen tp link ? that just plugs into the ac like a wall wart, I wonder if this is the wi fi ? I don't know why this would be efected by the condo project though.
I am using an aux antenna jack for my antenna so all I would have to do if find a wi fi amplifier I have googled for hours and cannot find one has to be diy kit though as cannot afford fancy item.
I'm at -90db on wi fi anylizer, all I need is -86 to connect again.
Using wi-fi routers ("mesh system" 2012? qst) wd6ejn on 16/2/18
Rather belated update but I showed the picture in qst of the BT and Parrot earphones and four wheel drive perched on the side of the cliff (dont try to cut & paste this and send it to a non ham you will get blocked and not see this article again!) He is a computer guru and said this is a Rasberry Pie. oops! Sorry I was trying to update the other post and Lost the hot spot connection, theres no cut & psts so you have to read it hea
I couldnt find the same BT & earphones as the ham kit at candy store, so I still dont know where I can buy it I dont think its rasberry pie.

Public Service Home Page KA8TNF on 17/5/16
Quote by KA8TNF
I noticed when I was checking on the PS Home page, there is a picture of a CERT member holding an FRS radio. REALLY! We could'nt find a HAM Radio with a ARES vest. I'm just saying!! Terry KA8TNF

I don't believe it! I have been trying to implement frs for casual non-license communications for many years between neighbors on our block with no luck.
I know it's not my indoor antennas as I can hear plenty of sinals including an occasional weak signal from a 70cm ham rig near by.
Any form of radio by non radio/internet/cell phone devotees is frowned uponed.
What is the url of CERT member holding frs radio?

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