🏁 COMPLETED WANTED: Fisher F-pulse pointer (first model)

[Cheka]

Thank you Carl for the most interesting information. IN appreciate having the specifics…

 

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[metalman2024]

I have an F-Pulse pin-pointer I bought in 2018. Problem with it, is that when it's around VLF machines, it fails sometimes to engage, you have to press the start button some 5 times to get it detecting.

 

[Cheka]

Thank you very much for your reply. I’ve been able to purchase a couple of the Earley pointers which satisfies my needs for now. What if I should need more, I’ll reach out to you. Happy new year.

 

[McKinney_5900]

I have an F-Pulse pin-pointer I bought in 2018. Problem with it, is that when it's around VLF machines, it fails sometimes to engage, you have to press the start button some 5 times to get it detecting.

How long did you test it before it went bad?

 

[metalman2024]

How long did you test it before it went bad?

It worked just fine until I used it in Late November and in December 2024, then it started acting up, whether that was due to the -1 to +3 C weather or whether it is due to being around a GMT and a Legend which are VLF machines, I can't say. In the past, I used it around the GMT only and used it to hunt for silver in Cobalt, Ontario. When it does work it finds the target really quickly unless the target is stuck in the side of the hole, it's not a tip only machine, so one can't tell the target is in the wall or at the bottom of the hole, it's very sensitive.

 

[Carl-NC]

Turbo mode was never officially documented. The default operation is you press the button to turn on; it does a calibration before operation so the start-up takes about 0.25 to 0.5 seconds. During operation, a quick-press of the button does a retune, while a press/hold for 1 second powers down. Some people wanted a faster power up/down so turbo mode bypasses the start-up cal for an instantaneous turn-on, and a quick press turns it off while a press/hold does the retune.

 

[Carl-NC]

It worked just fine until I used it in Late November and in December 2024, then it started acting up, whether that was due to the -1 to +3 C weather or whether it is due to being around a GMT and a Legend which are VLF machines, I can't say.

Might be the cold causing the mechanical button to malfunction. Can't imagine another detector would cause it not to power on.

 

[Cheka]

Carl- Do you know what the design target was for detection range and sensitivity? Such as quarter at 5-6 inches? Or other? Was there a significant variation in sensitivity between production units…? Thanks, Keith

 

[metalman2024]

Might be the cold causing the mechanical button to malfunction. Can't imagine another detector would cause it not to power on.

Thanks, though, Pulse induction (PI) has interference with very low frequency (VLF) machines, as a matter of fact, PI pin-pointers are not allowed in one metal detecting club I know of but don’t belong to. I will try to find and post that club name for confirmation.

 

[metalman2024]

Thanks, though, Pulse induction (PI) has interference with very low frequency (VLF) machines, as a matter of fact, PI pin-pointers are not allowed in one metal detecting club I know of but don’t belong to. I will try to find and post that club name for confirmation.

Don’t get me wrong, I still love the machine, I digress, but I wish it was tip detection only.

 

[Carl-NC]

Carl- Do you know what the design target was for detection range and sensitivity? Such as quarter at 5-6 inches? Or other? Was there a significant variation in sensitivity between production units…? Thanks, Keith

Originally a nickel at 3.25", quarter at 2.75". I think it's still the same. I've tested over 100 units in the factory and there was little deviation from this.

Thanks, though, Pulse induction (PI) has interference with very low frequency (VLF) machines, as a matter of fact, PI pin-pointers are not allowed in one metal detecting club I know of but don’t belong to. I will try to find and post that club name for confirmation.

Any pinpointer has the potential to interfere with any detector (it's a statistical thing) although, yes, PI can be worse. That's why the F-Pulse has a frequency shift feature. Otherwise, I've found that moving the coil away by 3-4 feet works well.

 

[metalman2024]

Originally a nickel at 3.25", quarter at 2.75". I think it's still the same. I've tested over 100 units in the factory and there was little deviation from this.


Any pinpointer has the potential to interfere with any detector (it's a statistical thing) although, yes, PI can be worse. That's why the F-Pulse has a frequency shift feature. Otherwise, I've found that moving the coil away by 3-4 feet works well.

I appreciate your response, by statistical you mean the likelihood of the two detectors resonating with one another I suppose, bell frequency curves with 5% insignificance, my favorite subject but the only one I didn't do well at university! The 5% comes up a lot in engineering, it's some mysterious number in my experience.

I digress but for the sake of chatting and getting to know people, I lived in Washington state for some time, and just wanted to ask, what types of targets are there for metal detecting and the prevalence of the target/s? I find old parks the most yielding, haven't tried curb strips yet. Thanks.

 

[metalman2024]

The first model was produced from 2018 to 2021. Sometime in 2022 an improved second model was introduced. Turn on your f-pulse with the pointer next to a piece of metal. If it locks up and must be restarted, it is a first model.

checked it out, thanks for sharing this info