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Offline SimpsonTopic starter
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« on: January 24, 2009, 08:37:16 am »
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Build the Frisker - BFO Metal Detector I

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Build the Frisker - Part I

by William Sheets & Rudolf F. Graf

This project is a BFO packaged as a handheld device. The reference oscillator is a crystal, and the search oscillator is tuned with a varactor using a potentiometer. It appeared in the November 2002 issue of Poptronics, which is now the Poptronix website.

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« Last Edit: December 09, 2009, 12:36:23 am by Christian » 		Logged
Offline Eugene52
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« Reply #1 on: July 21, 2009, 02:01:06 pm »
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Hello RobJY . Welcome to Thunting.com !!! BFO'S are not manufactured anymore so the BFO schematics that are posted here are for educational reading and maybe some experimenting ........Please check out our Thunting.com's Tech Talk area . Lots of projects to choose from , VLF [very low frequency with discrimination] and P.I. [pulse induction] for deep-seeking [no-discrimination] .........Regards.........Eugene

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Offline RobJY
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« Reply #2 on: July 22, 2009, 02:38:13 am »
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Thanks Eugene,
cant see the circuits as I havent got 15 posts yet!

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« Reply #3 on: July 23, 2009, 06:00:39 pm »
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RobJY;

Ive got 159 posts and I havent seen it either. Amen

Brian AKA goldigger


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« Reply #4 on: July 24, 2009, 02:44:42 am »
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Cheers Goldiger thought it was a problem with my subs!

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