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coil tuning anyone?

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nuckolls.bob(at)aeroelect
Guest

Posted: Tue Apr 12, 2011 6:49 pm Post subject: coil tuning anyone?

 	  Quote: 	
		  If you have any suggestions on

what might make the following project work better, I'm all ears.

http://www.easytreasure.co.uk/bfo.htm


	


   I just reviewed this schematic again with some

   attention to the audio section . . . the

   thing has serious design flaws. We were

   focused on the oscillators and I didn't really

   do any kind of sanity check on the rest of it.

   The guy who designed this obviously had little

   knowledge of how to build stable, multi-stage

   amplifiers from transistors.



   You may be trying to build and troubleshoot

   a circuit that is crippled right out of the

   gate.

   Bob . . .

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dan(at)azshowersolutions.
Guest

Posted: Tue Apr 12, 2011 11:45 pm Post subject: coil tuning anyone?

---

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mikerv6a(at)ao-cs.com
Guest

Posted: Wed Apr 13, 2011 7:46 am Post subject: coil tuning anyone?

For very comprehensive information about metal detectors,

take a look at www.geotech1.com. You will find very

extensive pursuit of the subject, and projects that

are examples of good work.



Mike Linse

RV-6A builder- Corvallis, OR

[quote] 

 <dan(at)azshowersolutions.com>



 ---

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Apr 13, 2011 9:56 am Post subject: coil tuning anyone?

At 11:42 AM 4/13/2011, you wrote:

 	  Quote: 	
		  



For very comprehensive information about metal detectors,

take a look at www.geotech1.com. You will find very

extensive pursuit of the subject, and projects that

are examples of good work.


	


   Cool resource Mike, thanks!

   Bob . . .

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