Origional 1985 Fisher MScope Impulse in Origional Case 100% Working.Value?Offers,Swops?

[RichterS]

I have an authentic piece of history
Fisher MScope Impulse from 1985 in Origional Case in 100%Working order.
There are Not alot of these around.
Id like to know what its value is ,and how rare exactly are they these days

 

[pepperj]

I have an authentic piece of history
Fisher MScope Impulse from 1985 in Origional Case in 100%Working order.
There are Not alot of these around.
Id like to know what its value is ,and how rare exactly are they these days

Rarity - moderately
value - $125-200
Having the hard case is a bonus.
But still don't bank on an early retirement.

 

[Carl-NC]

value - $125-200

Good estimate. I have one, if I were to sell it I'd ask $200 and take $150.

 

[Assembler]

Transmit Frequency 5,333 pulses per second, crystal controlled Audio Target Response.

Very interesting that no ground balance is required.

 

[Carl-NC]

Many of the older PI detectors had no GB... Surf PI, Sandshark, XL500, Barracuda, Headhunter... they were intended for surf use where you don't need GB.

 

[Assembler]

Many of the older PI detectors had no GB... Surf PI, Sandshark, XL500, Barracuda, Headhunter... they were intended for surf use where you don't need GB.

Sounds like the saltwater filter factor was built in.

 

[RichterS]

I have an authentic piece of history
Fisher MScope Impulse from 1985 in Origional Case in 100%Working order.
There are Not alot of these around.
Id like to know what its value is ,and how rare exactly are they these days

Thanx for advise guys,I dont think this things ever been in water,the guy I got it from wat a surface surfer ,the fist time I saw it , I thought it was a home built unit,due to to shaft color and build ,I also have not used it under water water.Very solid Unit

The interesting part is that 1985 was when Fisher's engineers started developing the Impulse specifically as a pulse-induction (PI) detector. Their target was a machine that could:

• go deep underwater
• handle salt water and black sand
• operate without constant retuning
• detect with no coil movement
• have much better battery life than contemporary PI detectors
• respond quickly to targets.

Who actually designed it?​

The person most closely associated with the original Impulse's engineering is David Johnson, a famous Fisher engineer. Historical detector documentation credits Johnson with the design, particularly the unusual method used to recover energy normally wasted when the PI pulse collapses ("flyback"), which dramatically improved battery life.


So this wasn't some cheap generic 1980s detector.


It was a serious Fisher engineering project aimed at underwater treasure hunting.

I have an authentic piece of history
Fisher MScope Impulse from 1985 in Origional Case in 100%Working order.
There are Not alot of these around.
Id like to know what its value is ,and how rare exactly are they these days

 

[Carl-NC]

Minty, with the case, might push it to $300. You need a buyer who is either a collector, or who really wants to use it.

Yes, Dave Johnson designed the Impulse. PI detectors at the time were power hogs so Dave created a way to recycle the TX energy. As such, it operates differently than a true PI detector and sensitivity was not as good, but it would run for days on a battery pack. Because sensitivity was lower, he could also run it in static mode which is unheard of with PI. The case is built like a tank -- I think it's been tested beyond 200 ft -- but also heavy, so with a lack of raw sensitivity and heavy weight it never really caught on with either surf hunters or divers.

 

[RichterS]

Minty, with the case, might push it to $300. You need a buyer who is either a collector, or who really wants to use it.

Yes, Dave Johnson designed the Impulse. PI detectors at the time were power hogs so Dave created a way to recycle the TX energy. As such, it operates differently than a true PI detector and sensitivity was not as good, but it would run for days on a battery pack. Because sensitivity was lower, he could also run it in static mode which is unheard of with PI. The case is built like a tank -- I think it's been tested beyond 200 ft -- but also heavy, so with a lack of raw sensitivity and heavy weight it never really caught on with either surf hunters or divers.

Thanx a mill yes batteries last month's like 5months so far