Go Back   Home > Forums > General Interest > Everything Else

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th July 2012, 07:50 PM   #11
diyAudio Member
 
Join Date: Jan 2010
Location: Rome
here's the coil pcb! made with a 10x12 (cm) board.

remember that the circuit is an high power version... it can easily sustain a large house with more than one floor.

searching on the web i saw only version supplied with 5Vdc... this one is 12Vdc supplied
(obviously the output power can be adjusted)


in italy is saturday night so... no sleep until 5 a.m.
Attached Files
File Type: pdf antenna2.pdf (8.7 KB, 89 views)
  Reply With Quote
Old 14th July 2012, 07:53 PM   #12
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
__________________
my Papa is smarter than your Nelson !
tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb
  Reply With Quote
Old 14th July 2012, 07:54 PM   #13
diyAudio Member
 
Join Date: Nov 2006
Location: Lyon
Much more interresting to know how you recover from a short night.
Could be very usefull
Take some informations about frequency, power, duration...
  Reply With Quote
Old 14th July 2012, 07:55 PM   #14
diyAudio Member
 
Join Date: Jan 2010
Location: Rome
hoping it will help!
  Reply With Quote
Old 15th July 2012, 01:20 PM   #15
diyAudio Member
 
Join Date: Nov 2006
Location: Lyon
So ?
  Reply With Quote
Old 15th July 2012, 07:57 PM   #16
diyAudio Member
 
Join Date: Jan 2010
Location: Rome
so i'm just came back from beach... my parents said: "we sleeped unusually well"... so i think this device isn't a fake!

about listen some music: more relax = more enjoying listening some music (at least i think it's so)

now some measurement about the pcb coil:
7.6ohm resistance
16uH inductance

the frequency measured after 24 hour of usage is changed (cause of temperature) to 7.86Hz so i adjusted the trimmer to obtain 7.83Hz

with this correction works at 7.83Hz during normal operation
  Reply With Quote
Old 15th July 2012, 08:15 PM   #17
diyAudio Member
 
Join Date: Jan 2010
Location: Rome
other measurements and some calculations:

supplied with 12Vdc we obtain 8.48Vrms
the frequency 7.83Hz
the total resistance (coil + 100ohm resistor) is 107.6ohm
the inductance 16uH

we can now calculate current e output power:

I = Vrms / res = 8.48 / 107.6 = 78.9mA
P = Z * I^2 = 2 * pi * H * F * I^2 = 6.28 * 16 * 10^(-6) * 7.83 * 0.0789^2 = 5uW

this is a low output power, i expected to obtain at least 10mW. maybe i've calculated wrong?

any suggestions appreciated
  Reply With Quote
Old 16th September 2012, 10:37 PM   #18
diyAudio Member
 
Join Date: Nov 2006
Location: Lyon
No news ?
  Reply With Quote
Old 1st December 2013, 09:47 PM   #19
Crom is offline Crom  United Kingdom
diyAudio Member
 
Join Date: Oct 2012
Very interesting thread. Any update?
  Reply With Quote
Old 1st December 2013, 10:05 PM   #20
diyAudio Member
 
Join Date: Nov 2007
Location: Dallas
You will need a coil with all turns in one direction if you expect it to emit a useful field.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY Schumann resonator? protos Everything Else 195 7th November 2013 02:35 PM
Resonator guitars PhaseLockLoopy Instruments and Amps 3 30th May 2008 04:28 PM
Horn-Resonator? TroelsM Multi-Way 5 29th September 2005 02:23 PM
isobaric resonator? tade Subwoofers 6 17th August 2005 07:24 AM
Ceramic resonator pinout trwh Digital Source 2 21st July 2002 12:35 PM


New To Site? Need Help?

All times are GMT. The time now is 10:04 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2