ITC Bridge Home 
Home Search search Menu menu Not logged in - Login | Register

ITC Bridge and iDigitalMedium.com are now VARANORMAL.COM Please visit: https://www.varanormal.com This site does not allow new registrations, and is now an online archive of a decade of Paranormal and ITC (Instrumental Transcommunication) experimentation from 2007 - 2016 We thank you for a wonderful decade! ~ Keith Clark & Ron Ruiz

 Moderated by: Vicki Talbott, Keith Clark, ArizonaEvp
New Topic Reply Printer Friendly
Crystal radio Circuits  Rating:  Rating
AuthorPost
You have chosen to ignore kurtie. click Here to view this post

 Posted: Nov 1st, 2008 11:50 AM
  PM Quote Reply
2nd Post
Keith Clark
Administrator


Joined: Dec 31st, 2006
Location: Clearwater, Florida USA
Posts: 1637
Status: 
Offline
Hi Kurtie,

Thanks for the link - it's full of information, and some may find it useful.

Keith

Back To Top PM Quote Reply

You have chosen to ignore kurtie. click Here to view this post

You have chosen to ignore kurtie. click Here to view this post

 Posted: Nov 4th, 2008 09:53 PM
  PM Quote Reply
5th Post
Keith Clark
Administrator


Joined: Dec 31st, 2006
Location: Clearwater, Florida USA
Posts: 1637
Status: 
Offline
Hi Kurtie,

Well, no questions are stupid - but I'm also not very gifted electronically, so I'm not the best person to answer it. Perhaps Slider or another technically minded person here would be able to answer your question.

When I did experiments with germanium diodes, I found that I had to plug it into an amplifier (mixer) to even be able to hear or use it. The volume was naturally too low.

Either way, good luck.

Keith

 

Back To Top PM Quote Reply  

 Posted: Nov 5th, 2008 10:54 AM
  PM Quote Reply
6th Post
Slider2732
Member
 

Joined: Mar 3rd, 2008
Location: Muskogee, Oklahoma USA
Posts: 349
Status: 
Offline
Crystal circuits I too am not that familiar with unfortunately. I have always been put off by the need to have a good Ground connection, the wire that should go to perhaps metal household plumbing or metal heating system of the house. The aerial typically needs to be quite some length too, to pick up stations...2 metres and more. Apparently a long wire can run from a handheld crystal circuit and touch a concrete floor as the Ground connection, but with all being able to be replaced by 1x AA battery for a conventional receiver, it just all passed me by.

They do work, but do need a correct earphone. The ones for cassette recorders etc need power to work, however there's no battery in a crystal circuit.

Such work is very important in my opinion, especially within ITC. Stray pick ups of strong signals might give false results in sweep radio circuits etc, if someone were to use a germanium diode in place of a regular one. On altering a Casio home keyboard earlier this year to get some better sounds out of it, I inadvertantly created a radio circuit and picked up a local channel !  Quite funny, but showed that radio circuits need not be designed and can be the consequence of some components interacting with others.


Just had a look at this page: http://www.crystalradio.net/howitworks/index.shtml
It has the fundamentals of crystal radio operation and while quite basic, teaches the basics. Quite often ITC seems like High school physics lessons. Only later do I think such things might be useful and wish i'd paid a little more attention at the time lol
 

Back To Top PM Quote Reply

You have chosen to ignore kurtie. click Here to view this post

You have chosen to ignore kurtie. click Here to view this post

 Posted: Nov 6th, 2008 07:34 AM
  PM Quote Reply
9th Post
Keith Clark
Administrator


Joined: Dec 31st, 2006
Location: Clearwater, Florida USA
Posts: 1637
Status: 
Offline
Hi Kurtie,

I am about to start live radio experiment sessions with audio/video. Perhaps you might be interested in participating?

For more info, visit the following page at this other site:

http://www.bestpsychicnetwork.info/group/itcbridgeradiocollaborationproject/forum/topics/introductory-post-start-here

Keith

Back To Top PM Quote Reply  

 Posted: Nov 6th, 2008 08:18 AM
  PM Quote Reply
10th Post
joecioppi
Moderator


Joined: Sep 22nd, 2008
Location: Doylestown, Pennsylvania USA
Posts: 130
Status: 
Offline
kurtie,

The circuit you have posted needs a resistor from the diode to the base of the coil for the current to flow from the top of the coil through the diode and back to the coil .
The input jack of the recorder may not have a return to ground and the resister is necessary. The crystal earphone shown also needs the resistor because the nature of a crystal earphone is capacitive and will not present a proper load to the diode.

The tuning capacitor shown  will tune radio stations that can block evp in the static noise. Leave it out or tune to quiet space between stations.

joecioppi

Back To Top PM Quote Reply

Current time is 09:56 AM  
ITC Bridge > Instrumental Transcommunication (ITC) > Frequency Sweep | Radio Sweep Tuning > Crystal radio Circuits Top




UltraBB 1.17 Copyright © 2007-2008 Data 1 Systems
Page processed in 0.1529 seconds (24% database + 76% PHP). 31 queries executed.