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I mostly read and rarely post but
McGhee
Date: January 05, 2005 06:18PM
I've seen several post concerning the operating frequency of the C$. Without using names or titles, some time back I was enquiring about DPA technology. I was speaking with a person who should know this machine inside/out. I was then told (well, more like "almost" told-wink..wink) without even asking, nor being on the subject of frequency that; The C$ was like the CZ's a Dual VLF emitter. True or false...I have no idea, but I wonder if anyone else has been told the same?
CU Jim

I have always guessed....
Bill Ladd 525
Date: January 06, 2005 02:40PM
<!--billl-->
it's probably like the Excel frequency, which is published But engineering is not my thing at all so I'm just guessing.....


Update..this may be of interest
McGhee
Date: January 06, 2005 03:46PM
I found the following on a well known site and have copied and pasted portions of it here. Take a look underneath the heading of Features, on the seventh line down???
The Fisher Coin Strike is a state of the art metal detector. It offers programmable notch discrimination, digital target ID, Wet Salt Beach operation and many more features. Deep Seeking and Target ID! What more could you expect from the worlds leading metal detector manufacturer?
Features:
4-Tone Audio Target ID
Numeric Target ID - Averaging Function Control
Precision Auto Ground Balance System
Accurate Numeric ID in Both All-Metal and Disc Modes
Programmable Notch Discrimination
Handle, Belt, or Chest Mount
Dual VLF Frequency
Programmable Interface:
Last-Setting, Favorite Setting and Factory Preset Memory Feature
Wet-Sand, Salt Beach Mode
High Resolution Iron Discrimination
Fisher Lifetime Warranty
COIN STRIKE SPECIFICATIONS: Weight: 3.5 lbs.
Length: 52 inches extended. 41 inches collapsed.
Batteries: (2) 9 volt alkaline. 20-25 hours.
Standard 8 inch spider coil-waterproof.
LCD Panel: 3x2 inches with constant control read-out and backlight.
Frequency: Target response: low tone=iron. low/mid tone=foil, nickel, round tabs. mid/high tone=square tabs, zinc. high tone=copper, clad, silver coins

Re: I have always guessed....
KEVIN[NC]
Date: January 06, 2005 05:42PM
My guess is that it uses 1 frequency in disk mode, and a different one in all metal. It will hit some targets in all metal mode, that it don't see in disk or pinpoint mode. Mostly hot rock types of targets. I run disk mode with nothing disked out, not even iron.
I'll stick to my guess until Fisher lets the facts out. hehe

Scope images of the Fishers
Mr. Bill
Date: January 06, 2005 06:45PM
Here is a 3 scope scans of a few of the Fisher units.
The first one is a Coinstrike.
The second one a 1270
The third one a CZ
As you can see the signal from the CZ is quite a bit different from the single freq. C$, and the 1270.
You have to admit, Fisher managed to keep interest up with this subject. This multi. frequency thing certainly has a lot of people mystified, and it

Simple enough...Thanks Mr. Bill
McGhee
Date: January 06, 2005 06:57PM
Re: Simple enough...Thanks Mr. Bill
Mr. Bill
Date: January 06, 2005 07:19PM
They were just quick scans, holding the cam. in one hand, and the pickup coil for the scope in the other.
All kidding aside, I remember reading something from Fisher a long while back of it being 7khz. on the C$. I didn't give it much thought at the time.
Lot's were mystified about it because the performance was up there with all of them. So they were looking for a answer, and they assumed it was multi-freq. No one gave it a thought that it could be from good circuit design.
It doesn't necessary have to be multi-freq to be top performing.
I wish I knew a little more about this, it's certainly a nice running detector.
Have a nice day
Mr. Bill


Thanks for the post, neat to see the frequency shift! HH
Bavaria Mike
Date: January 07, 2005 01:58AM
Your right
Bill Ladd 525
Date: January 07, 2005 07:15AM
<!--billl-->
I know we've talked about before that everyone thinks a bunch of arrows going into the ground has gutta be the best. So with Fisher saying the C$ is "proprietary" it leaves everyone guessing


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