FISHER CZ20 SWITCHOUT TO A CZ21

lookindown

Gold Member
Mar 11, 2010
7,089
4,936
Florida
🏆 Honorable Mentions:
1
Detector(s) used
ACE 250,AT PRO, CZ21...RTG pro scoop...Stealth 720
Primary Interest:
All Treasure Hunting
I don't think any one knows what they really do. You get a new CZ21 faceplate but no one knows if you get new internal parts or they refurbish the old electronics or what. Ive seen people say what they thought was done but never heard from someone that really knew.
 

woof!

Bronze Member
Dec 12, 2010
1,185
413
ciudadano del universo, residente de El Paso TX
Detector(s) used
BS detector
Primary Interest:
Other
The CZ20 was introduced in 1995 by the "old Fisher". It was a pretty good machine at the time, but over the years they forgot how to calibrate the darn thing (very complicated calibration procedure), they forgot the things that were necessary to keep it from leaking under water pressure, and finally the company that manufactured the pinpoint switch stopped making it. The plastic tooling and user interface circuitry were designed around that particular switch.

It was no longer possible to repair a CZ20 to its original condition. In fact, not even the Old Fisher could repair a CZ20 to its original condition: they didn't know how and they didn't have the materials on hand to do it anyhow.

When the old Fisher finally went belly up because almost nobody wanted their products any more, FTP in El Paso purchased the assets. One of those assets was an underwater machine platform that once upon a time had worked right. That meant it was fixable, but it took us a couple years of figuring out all the problems and solving them to bring the thing back to the 1995 standard. It came at huge cost in plastic tooling to accommodate a new and different scuba-rated pinpoint switch, and to solve the leaker problems. I still don't know whether rescuing the damn thing was a good idea or a bad idea.

We can't refurb CZ20's because the materials to do it no longer exist, and in many cases the fact those materials no longer exist is a good thing. However, inasmuch as we manufacture the CZ21 which is by most accounts a very good product, we can convert a CZ20 to CZ21 specifications. Some of the CZ20 stuff is usually still salvageable, it depends on what lands on our receiving dock. Rather than try to negotiate with each customer a price to change over his or her particular machine, the factory declared a fixed price for the conversion, it's either yes or no.

The CZ21 circuit design, insofar as it impacts performance, is exactly the same as the original CZ20. Which is the same as the original CZ-6 in saltcomp mode as introduced late 1991.

*****************

The CZ series have provoked a lot of discussion hereabouts. I began development of multifreakers within weeks of my hire with Fisher in 1981, and the CZ platform was fielded a decade later. Here we are more than 2 decades later still making the things. The other "old Fisher" thing we still make for the consumer market is the GB2, introduced 19 years ago. Every consumer market product introduced by the Old Fisher since that time has been discontinued because customers decided they didn't cut it.

For the last 33 years, I have been the engineering design philosophy behind the Fisher trademark. Things went to hell during my over 10 years furlough but the philosophy that kept the Fisher trademark alive during that hiatus is still here. I fight for every hour of battery life, I fight for the basics of detection technology, I fight for simplicity of user interfaces so the customer can actually deploy the benefits of the technology, and I fight for no piling on of expensive and mostly useless "features".
 

lookindown

Gold Member
Mar 11, 2010
7,089
4,936
Florida
🏆 Honorable Mentions:
1
Detector(s) used
ACE 250,AT PRO, CZ21...RTG pro scoop...Stealth 720
Primary Interest:
All Treasure Hunting
Thanks woof.
 

Fletch88

Silver Member
Mar 7, 2013
4,841
2,367
Valdosta, GA
Detector(s) used
Garrett ATPro- 8.5x11, 5x8, CORS Fotune 5.5x9.5
Tesoro Silver microMax- 8 donut, 8x11 RSD, 3x18 Cleansweep
Minelab Excalibur ll- 10" Tornado
Minelab CTX 3030
Minelab Xterra 305
Primary Interest:
All Treasure Hunting
Thanks for info woof! I just bought a cz-3d and am finding after watching both of Toms videos and using it for the first real hunt today that I love this machine and the simplicity of its operation. I may be a cz convert after all. Sorry if I'm off topic.
 

Last edited:
OP
OP
nomad 11

nomad 11

Bronze Member
Nov 21, 2009
2,455
2,489
nomads land
Detector(s) used
any tector i can get my hands on
thanks guys for the response.but i really want to hear from those that had the change over done and if they think it was worth it.before i throw more money into this machine.
 

Rick (Nova Scotia)

Silver Member
May 8, 2008
4,098
2,711
🥇 Banner finds
3
🏆 Honorable Mentions:
3
Detector(s) used
Omega, F75, AT Pro
Primary Interest:
All Treasure Hunting
thanks guys for the response.but i really want to hear from those that had the change over done and if they think it was worth it.before i throw more money into this machine.

I guess the bottom line would be if your 20 is working fine then I would have to say no it is not worth it...what gain ?
If on the other hand your pin point button is broke (and you think you need one) or if your having other issues, then yes it will be worth it.

If it ain't broke don't fix it. (Dave just said they have the same "brain") If and when it does fail in some way get the conversion, it will be worth it. Great machine ask Casper2
 

Sandman

Gold Member
Aug 6, 2005
13,398
3,992
In Michigan now.
Detector(s) used
Excal 1000, Excal II, Sovereign GT, CZ-20, Tiger Shark, Tejon, GTI 1500, Surfmaster Pulse, CZ6a, DFX, AT PRO, Fisher 1235, Surf PI Pro, 1280-X, many more because I enjoy learning them. New Garrett Ca
Primary Interest:
All Treasure Hunting
I still use my CZ-20 with the larger coil. A long time ago I covered my pinpoint button with clear silicone sealant as I never feel the need for the pinpoint since I have the scoop. The controls are hung from my neck since I don't dive with it anymore. Occasionally I wipe down the cable with silicone to keep it playable. It is still a great detector and don't think Fisher can improve on it except maybe adding a Beer tap.
 

Top Member Reactions

Users who are viewing this thread

Top