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 Moderated by: Vicki Talbott, Keith Clark, fratka, EVPDave, ArizonaEvp
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 Posted: Nov 13th, 2007 09:14 AM
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fratka
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I built a new board using a perf board, a 3.579545MHz Crystal, a 50v10uf electrolytic capacitor, and a LM386 OpAmp. I put them all in series and completed the circuit with a 9v battery. After the first recording I thought maybe I was picking up some radio traffic so I did a second recording asking for recognizable names or people I know. The first I asked for was my name. This is what I received:

Frank R

Attachment: 111307CrystalLM386_Record2_kk2_namesarenotsupposedtotrackhim.mp3 (Downloaded 558 times)

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 Posted: Nov 13th, 2007 09:15 AM
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fratka
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same file 2:

Attachment: 111307CrystalLM386_Record2_kk2_noseeker.mp3 (Downloaded 394 times)

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 Posted: Nov 13th, 2007 09:16 AM
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fratka
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Still file 2:

Attachment: 111307CrystalLM386_Record2_kk2_nowwerestartingtofunction.mp3 (Downloaded 452 times)

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 Posted: Nov 13th, 2007 09:17 AM
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fratka
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And another:

Attachment: 111307CrystalLM386_Record2_kk2_dontjamus.mp3 (Downloaded 481 times)

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 Posted: Nov 14th, 2007 06:17 AM
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fratka
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This is a picture of the Crystal, LM386 and Cap combination on a piece of perf board. You will also notice the 3.5mm stereo jack that is also connected in series. This is what allows me to record through the microphone input of my digital recorder.

All of the components were placed on a piece of MDF just to make it easier to work on and keep organized.

Best Regards,

Frank R.

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 Posted: Nov 14th, 2007 06:20 AM
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fratka
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Here is a message I thought was funny. Must be a new guy on my counterpart Jacob's team. LOL

Also, just to revisit the explanation of my filenaming scheme.... I will always post the filenames in this order from left to right: Date, method of recording, which recording number and what I think it says.

Regards,

Frank R.

Attachment: 111307CrystalLM386_Record3_strangesoundscomefromradios.mp3 (Downloaded 414 times)

Last edited on Nov 14th, 2007 06:23 AM by fratka

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 Posted: Nov 14th, 2007 08:24 AM
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Vicki Talbott
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Hi Frank,

These are very interesting sounding.  I especially like the last one, very, clear, and as you say, funny!  Vicki

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 Posted: Nov 14th, 2007 08:57 AM
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fratka
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Thanx Vicki! Can you hear the other ones? Don't worry, I know everyone has their own range and degree of hearing on these things. So, if you can't or if you hear them different don't hesitate to tell me.

Regards,

Frank R.

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 Posted: Nov 14th, 2007 09:52 AM
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fratka
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Thank You Estee! I have been going through all five of yesterdays recordings and I am still pulling messages out.

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 Posted: Nov 14th, 2007 10:19 AM
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Vicki Talbott
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Hi Frank--I hear them pretty much as you do except for the second one, which sounds to me like "I won't see her," or "One won't see her."  Good ones and interesting method of capture.  Vicki

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 Posted: Nov 14th, 2007 10:45 AM
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fratka
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Yeah, I think that is the same one Misty commented on. She said something similar to what you said. Interesting!

Frank R.

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 Posted: Nov 27th, 2007 09:13 PM
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Notemanz
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Hi Frank! I'm new and love this site.

1.  We are the last person by you
2. No one's here

The last two seem inconclusive to my ears.

Very cool!

John D

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 Posted: Jan 15th, 2008 12:29 PM
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sparks
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Hi,

Could you plse give more detail about how connected the components up. Do you have a circuit of it?

Im assuming the cap and crystal are in series, which feed the input of the op-amp, and presume the op-amp is wired as a buffer amp?

regards,

JEFF 

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 Posted: Jan 15th, 2008 01:24 PM
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fratka
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No need for detail, you got it in your question. I just threw some components together to see what would happen. It turned out that they worked but not as well as I wanted. During this phase of my research I was looking for the signal generation of the system I am building. I already have the signal processing unit together (pulse modulated laser transceiver) and a simple recording unit.

I believe I may have found a good signal generator in the design of Mike Colletta's Spiricomp array. It consists of three AM/FM digital scanning radios (RS 12-469) connected to a Radio Shack, 4 channel mixer. From there the RCA cables are fed into my laptop where the signals are run through DCSix with SoundSoap2 to clean up the sound.

The three radios scan the FM (or AM, whatever your pref) band at different intervals and not spending more than a millisecond (estimated) on each scanned frequency.

Regards,

Frank R.

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 Posted: Jan 15th, 2008 01:26 PM
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fratka
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Here is a sample of what I get through the "Spiricomp" array.

Attachment: 010808Spiricomp_Record1_wearefocusing.mp3 (Downloaded 519 times)

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 Posted: Jan 15th, 2008 02:28 PM
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Notemanz
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So this is a radio sweep array not Spiricom array per se?

How are the radios sweeping via the "hack" posted online?

Thanks much,
John D

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 Posted: Jan 15th, 2008 02:29 PM
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Notemanz
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Have you experimented with your array enclosed in Faraday cage?

John D

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 Posted: Jan 15th, 2008 02:34 PM
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fratka
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Yeah this is sweeping. Its not really the "hack" posted online but a modified version. As for placing it in a faraday cage, well that would not work since it would block out the very thing it depends on for complex sound. The radio signals are needed.

Regards,

Frank R.

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 Posted: Jan 15th, 2008 02:43 PM
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Notemanz
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You might try it as I and others are getting interesting results with the resultant sweep of static.

Best,
John D

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 Posted: Jan 15th, 2008 03:12 PM
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sparks
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In regards the scanning, are the radios linearly scanning or frequency hopping?

I presume they dont have a chance to individually receive bits of phonemes during adjacent channel increments?

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 Posted: Jan 16th, 2008 06:19 AM
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fratka
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John,

I have never tried the new system with a faraday cage but I will give it a try. I have worked with different media with a faraday cage and got speech through the background radiation (static). It is very robotic and metallic but discernable.

Example below*

Regards,

Frank R.

Attachment: 042507DVRRecord4_Diana_setfire_may13th.mp3 (Downloaded 1352 times)

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 Posted: Jan 16th, 2008 06:27 AM
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fratka
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Jeff,

The radios I am using are scanning linearly but in increments. Its not real scientific but I will start one at 87.5, the second at 100.3 and the third at 105.1 for example. This is my way of insuring I get different sound fragments from each station it passes. Sometimes I will reverse the scan on the center radio just to mix it up a bit.

As for phonemes, I haven't run across any one full word that I could guess the actual word. For example, if the name Rodger is spoken at one of the stations, I would get "Ro..." I'm not saying that it can't happen but I have not noticed it.

Here is a file of them saying my name....

Regards,

Frank R.

Attachment: 042507DVRRecord4_CLR_Frank Ratka.mp3 (Downloaded 481 times)

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 Posted: Jan 16th, 2008 11:30 AM
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Notemanz
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Nice capture Frank!  I'm also experimenting with mini box sweep.  I guess I'm still a skeptic when it comes to this method.

That's why I'm focusing more on something I've loosely dubbed "Staticom".

I'm working with AM static and tuning an array of occilators to be in harmonic resonance.

I'm getting a boatload of interesting data. Not saying it's EVP.  I'm not adherring to SPiricom tones but instead tuning the blended tones to be in resonance with the background radiation. 

No rocket science here yet in terms of tone generation.  I'm playing with the system and tuning pitch as needed to hear whatever it is I'm receiving.

The system as of yet, is not in a faraday cage, but will be so soon.  Everything is carefully shielded and the system runs into a behringer mixer. Noise reduction is live and "tune-able." All is recorded into the computer and I am mic-ed to comment and ask questions.

The system is sort of a modified Bacci system, encorporating some elements of Spiricom.

Pls. visit my thread and see what you might hear.

Best,
John D


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 Posted: Jan 16th, 2008 04:03 PM
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Jeff
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Good job; and great results Frank!  I would like to make a clarification, if I may.  The LM386 is actually a low power audio amplifier, and not an operational amplifier (OPAMP).  There are many differences between the two, but the main difference is that the LM386 has an audio power amplifier built-in to drive a small speaker, when the opamp does not.  The opamp usually requires a dual power supply, such as +15Vdc and -15Vdc, where the LM386 only requires one positive power source. 

Your choice, Frank, in the LM386 was a very good one in this case!  You didn't have to build another power amp to drive your speaker; and the output of the LM386 can drive a very wide range of impedances without having to build another impedance matching device.

For those interested, below is a link to the LM386 technical sheets from National Semiconductor.  If you scroll to the bottom of the sheet, there are some circuit suggestions from National Semiconductor to experiment with.  Since it is a pdf link, you may have to copy it into your browser address field:
web.mit.edu/6.115/www/datasheets/LM386.pdf

Many blessings,

Jeff

Last edited on Jan 16th, 2008 04:06 PM by Jeff

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