[x] Welcome at THunting.com!

A fun place to talk about Metal Detecting, Treasure Hunting & Prospecting. Here you can share finds and experience with thousands of members from all over the world

Join us and Register Now - Its FREE & EASY

THunting.com
Treasure Hunting & Metal Detecting Community
   
Advanced Search
*
Welcome, Guest! Please login or register HERE - It is FREE and easy.
Only registered users can post and view images on our message boards.
Did you miss your activation email?

Login with email, password and session length
Or Login Using Social Network Account
1
News:
Pages: 1    Go Down
Print
Share this topic on FacebookShare this topic on Del.icio.usShare this topic on DiggShare this topic on RedditShare this topic on Twitter
Tags:
0 Members and 1 Guest are viewing this topic.
Offline mikebgTopic starter
Copper Member
*

I prefer to think instead to experiment
Join Date: Aug, 2009
Thank you1

Activity
0%

Bulgaria
Posts: 58
Referrals: 0

310.00 Gold
View Inventory

Awards
« on: July 06, 2010, 11:23:29 pm »
Go Up Go Down

The program in this site has combined two my postings in the topic "Discriminating BFO detector" despite that time difference between them is one week (7 days). The first posting was sent by me in 07-01-2010. The second one (starting with word "Cornelius") was sent on 07-07-2010. The second one had title "Re: Motion BFO detector" and that title was set by the program for both postings.
To avoid such program intervencies I start here new topic with necessary title.
The attached figure shows the blocks inside PLL IC CD4046 and principle of their connections.
Here is some information about the author of Motion BFO detector:
Raymond (Ray) Charles Vincent Macario studied radio physics at King's College, London, where his studies of complex radio waves propagating in very varied conditions - using a unique contiguous spectum analyser - stood him in good stead in the embryionic mobile radio industry. He spent several years in industry designing radio-frequency and other circuits before accepting a lectureship post in communications in the Department of Electrical and Electronic Engineering at the University of Wales, Swansea. There he has had the opportunity to manage a hundred or more undergraduate and postgraduate projects in the radio business. He had lectured and given courses on mobile radio in most parts of the world.
He designed the first Motion BFO detector in 1978.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,16171.msg103954.html#msg103954



There are 1 attachment(s) in this post which you can not view or download

Please register for viewing them.

4046.jpg


Logged
Offline Homefire
Global Moderator
Platin Member
*****

Join Date: Jan, 2009
Thank you634

Activity
1%
Male
United States
Posts: 15906
Referrals: 0

52355.00 Gold
View Inventory

Awards
« Reply #1 on: July 06, 2010, 11:37:42 pm »
Go Up Go Down

Confused I am!  A BFO is motion orientated to begin with.

Motion and Induction is how they work.

Huh???



Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,16171.msg103956.html#msg103956




Logged
Offline mikebgTopic starter
Copper Member
*

I prefer to think instead to experiment
Join Date: Aug, 2009
Thank you1

Activity
0%

Bulgaria
Posts: 58
Referrals: 0

310.00 Gold
View Inventory

Awards
« Reply #2 on: July 07, 2010, 07:41:18 am »
Go Up Go Down

Quote:Posted by homefire
Confused I am!  A BFO is motion orientated to begin with.

Motion and Induction is how they work.Huh???

Homefire, excuse me that I use a bad term "Motion Metal Detector", but it is not discovered by me. It is used by experts in this art to describe the mode of operation when the search coil should be in motion in order device to respont to target.
In non-motion search mode, the detector continues to respond when the coil stops above the target. This is important at pinpointing when the coil is moved slowly.
In  motion mode, the audio signal slowly decays to zero or to threshold tone when the coil stops above the target.
The correct term is "Dynamic Metal Detector" but this term is used rarely.
An another term used more frequently for the same is SAT (Self Adjusting Threshold).
Yours Mike-BG

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,16171.msg104003.html#msg104003




Logged
Print
Pages: 1    Go Up
Jump to:  

Powered by SMF 1.1.19 | SMF © 2005, Simple Machines | Sitemap
Copyright THunting.com