King Cobra PCB

[kt315]

Schematics covered by the board.

GMT:
King Cobra
GMT1650
Gold Scorpion – most likely, no data
Thunder Stick – most likely, no data

1980: Deep Search VI, Deep Search IV, Deep Search VII
1981: Aztec, Cortes, Amigo
1982: Scout, Mayan
1983: Inca, Silver Sabre
1984: Sabre II, Sabre Supreme, Silver Turtle
1985: Golden Sabre, Cutlass
1986: Silver Sabre Plus, Eldorado, Royal Sabre
1987: Toltec 100
1988: Toltec 80, Diablo, 4 Reale, 8 Reale
1989: Golden Sabre Plus, Lobo
1990: Bandido, Pantera
1991: Diablo II, Silver Sabre II, Stingray, Laser B1
1992: Cutlass II, Golden Sabre II, Laser B2
1993: Bandido II
1994: Toltec II, Sidewinder
1995: Piranha, Stingray II, Laser B3
1996: uMax Bandido, uMax Cutlass, uMax Diablo, uMax Sidewinder, Amigo II
1997: Shadow X2, Lobo SuperTRAQ, Laser PowerMax, Bandido II uMax, Silver Sabre uMax
1998: Cutlass II uMax
1999: Sand Shark, Laser Rapier
2000: Conquistador, Compadre, Golden uMax, Tiger Shark
2001: Cortes, Conquistador uMax, Eldorado, Euro Sabre, Silver uMax
2003: DeLeon, Tejon
2004: Cibola, Vaquero

[calebsone]

ok I have everything KT for the small value caps in 50pf can I go with 47pf 50v or should I use 51pf 200v or is this going to cause an issue ?

[kt315]

ok I have everything KT for the small value caps in 50pf can I go with 47pf 50v or should I use 51pf 200v or is this going to cause an issue ?

'50' typo nominal value is American standart (from USA that had been spreaded in Taiwan, China and Japan). in our part of world we have 47 and 51 and no 50. both 47 and 51pF will be OK. main rule in electronics is that the caps' voltage value has to be no less than power supply voltage plus some reserve. for /+8-8/=/16/ we have to choice 16+X, ie 20V and 25V caps. 50V and 200V will be OK.

all the best

[kt315]

all files are reuploded for new members http://hidemyass.com/files/FTj4L/

[kt315]

http://www.findmall.com/read.php?17,...83#msg-1080183
thought may be I have to add Tesoro's Golden Sabre Plus to the list according Monte's info.

Tesoro's Golden Sabre Plus. The Golden Sabre didn't have the dual tone. The Golden Sabre Plus had the dual-tone audio, like the Royal Sabre, and also operated at 15 kHz (Tesoro's info) which was the same as the King Cobra.

Just remember that you run the risk of damaging a detector and the value is almost zip.

I'd simply tweak the GB trimmer for the worst ground where you're likely to hunt, then go enjoy the King Cobra. I worked with a lot of King Cobras as a distributor, mainly working moderate to highly mineralized locations, and once I tweaked it (not TOO positive, just slightly) I NEVER had a problem.

Monte

GMT:
King Cobra
GMT1650
Gold Scorpion – most likely, no data
Thunder Stick – most likely, no data

1980: Deep Search VI, Deep Search IV, Deep Search VII
1981: Aztec, Cortes, Amigo
1982: Scout, Mayan
1983: Inca, Silver Sabre
1984: Sabre II, Sabre Supreme, Silver Turtle
1985: Golden Sabre, Cutlass
1986: Silver Sabre Plus, Eldorado, Royal Sabre
1987: Toltec 100
1988: Toltec 80, Diablo, 4 Reale, 8 Reale
1989: Golden Sabre Plus, Lobo
1990: Bandido, Pantera
1991: Diablo II, Silver Sabre II, Stingray, Laser B1
1992: Cutlass II, Golden Sabre II, Laser B2
1993: Bandido II
1994: Toltec II, Sidewinder
1995: Piranha, Stingray II, Laser B3
1996: uMax Bandido, uMax Cutlass, uMax Diablo, uMax Sidewinder, Amigo II
1997: Shadow X2, Lobo SuperTRAQ, Laser PowerMax, Bandido II uMax, Silver Sabre uMax
1998: Cutlass II uMax
1999: Sand Shark, Laser Rapier
2000: Conquistador, Compadre, Golden uMax, Tiger Shark
2001: Cortes, Conquistador uMax, Eldorado, Euro Sabre, Silver uMax
2003: DeLeon, Tejon
2004: Cibola, Vaquero

[calebsone]

KT I found a whites concentric for 14 on ebay is there any way to make it work for this detector its called a 4b. its 6 something kh I think

[kt315]

GMT is working with a coil without capacitors inside, both on TX side and on RX side too. that is Tesoro type coil. I have no data on Whites 4b type, but thinking Whites always made coils with the capacitors inside. I do not suggest you, but you may open it and desolder the capacitors... 4b type has oldie 'omega' windings/balancing configuration IMO.

regards

[calebsone]

I just thought id get lucky but no biggie I keep looking or just make one thanks I have a very blurry finished board pic but when i find the camera cord they'll be right sorry

[kt315]

looks nice! there is some SAT instability in ALL METALL mode, people write me in PM about, but I hope to search the trouble as soon as we will go to summer here.

regards

[kt315]

TESORO 8 1/2" Wide Scan Search Coil --- 5 Pin Connector, at low price. may be applicable... have not full data on the coil.
http://www.ebay.com/itm/TESORO-8-1-2-Wide-Scan-Search-Coil-5-Pin-Connector-/251256929099?_trksid=p2047675.m1985&_trkparms=aid% 3D444000%26algo%3DSOI.CURRENT%26ao%3D1%26asc%3D13% 26meid%3D6845187440606117495%26pid%3D100012%26prg% 3D1014%26rk%3D3%26sd%3D251235072430%26#ht_2221wt_1 129

[kt315]

Keith sells a coil if you have a trouble on it http://compass-metal-detector-forum....td7588112.html

[starmoml]

What is the maximum depth at which a metal will find

[kt315]

What is the maximum depth at which a metal will find

http://www.losttreasure.com/content/...ntain-gmt-1650
http://www.losttreasure.com/content/...ain-king-cobra

[herpes]

how could it be otherwise, no problems, the disc position metal detected, but only to a maximum of 5 cm (two ton),all metall position no metal perception, have the switch cable checked, all in order, would be a wonderful if times times what works directly

[kt315]

what type you use Q1 and Q11 transistors? I see they are soldered inverted. main rule is all resistors have to be measured before to be soldered, even you are confident in its colour code.