FYI seahunter xl500 coil

[punagold]

I broke open a 14" coil from my old Garrett seahunter xl 500 pulse a while back. It had 13 turns of awg 22. bound every 3-4 inches with plastic zip-ties. For those interested.

[kt315]

thank you Punagold for your job. I put here a clipping related the Garrett coils, from Carl Moreland file.

Garrett
Name TX-L TX-R (ohms) TX-fo TX wire RX-L RX-R (ohms) RX-fo RX wire
________________________________________
BFO 12x24 120.9uH 3.22 --- ---

BFO 24x24 115.0uH 3.24 --- ---

XL500 7" 149.5uH 1.2 --- ---

XL500 12.5" 140.8uH 0.746 --- ---

SeaHunter MkII 8" 118.6uH 1.18 --- ---

SeaHunter MkII 10x14 107.2uH 1.38 --- ======

[Darin]

What kind of pulse delay is the Garrett SeaHunter mark II running at if the coils are at 118.6uh and 107.2uh.

[kt315]

from Frequencies Data Base no data on mark II.

Metal Detectors based on Operating Frequency

JW Fishers 8x ............................100 pps
Garrett Ace 150...........................6.5 kHz
Garrett Ace 250...........................6.5 kHz
Garrett Ace 350...........................8.25 kHz
Garrett AT Pro............................15 kHz
Garrett AT Gold..........................18 kHz
Garrett Deepseeker.................... 5.5 kHz
Garrett Gold Scorpion.................15 kHz
Garrett Groundhog.....................15 kHz
Garrett GTA..................................6.5 kHz
Garrett GTAx_500.......................7.0 kHz
Garrett GTI 1500..........................7.2 kHz
Garrett GTI 2500..........................7.2 kHz
Garrett GTP 1350........................7.2 kHz
Garrett Infinium Land & Sea.......730 pps
Garrett's Sea Hunter ............ 750 pps
Garrett Treasure Ace 300...........6.4 kHz

[kt315]

http://www.garrett.com/hobbysite/hbb...ter_manual.pdf 31 page specs 750 pps

[punagold]

I see that Garrett PI's are not rated in kHz, but rather pps. I wonder if that is why I couldn't get my scope to show any wave type of signal?
http://www.geotech1.com/forums/showt...scope-readings

[kt315]

all manipulations on o-scope to notice 80us width impulse you can see in this video

[punagold]

Thanks for the video kt315. Can you explain what I am viewing and what I should be looking for? I have ordered new wire (again) that will be a much better match to the original wire in my infinium 10 x 14 DD. It is on the way now, so I will not hook up my scope until I have a better coil fabricated. Until then, I am trying to learn how to use and read my scope.