TM 808 White's

[schpeedy]

Ive already seen this foto... thanks anyway

kt315, would you build it with or without the cave mode?
greets

[kt315]

veltex did share the PCB photo in hi-res http://zalil.ru/33974909
enjoy.

[target]

its a very old design long overdue for an upgrade ,its far too heavy for no good reason .
i hear XP are working on a featherlight carbon fibre modern state of the art design for deep hoards.
i had a 808 in the 80s .

[schpeedy]

i also compared the two schematics (new and old one) with each other. Its almost the same expect to a resistor with 20 ohms (the new has 220 kohms?!) and a capacitor and of couse the cave-mode-circuit (a few CIs are different sectioned but in the end its the same)

I´m a bit confused after all, but i will just start with ordering the parts and beginning the do the main board.... and hoping to get more information about details.
For example in the old schematics there are little tiny capacitors drawn paralell to the RX/TX-coils without specs.

Who knows more about them?

Thanks in advance...
Manuel

[schpeedy]

thanks for your quick reply kt315.
but its without cave mode then i guess. And with the new board (resulting from the new schematic from the forum i guess) i wont need these little platines?
The new schematic leaves me with a lot more questions than the old one from 1994... so i would prefer the old type.

Do you think, the new type is somehow "better"?

Did anybody in this forum finish this project and built his TM808 including coils??

Would be interessting...
Greets

[kt315]

veltex informs that White's uses SMD board in new tm-808. this is his photo.

[schpeedy]

i meant of those...sorry

[schpeedy]

David, thanks lots again!

does anybody know the specs of those resistors and capacitors?
why is it here http://www.geotech1.com/forums/showt...oil-inductance different? Or isnt it?

[Funfinder]

Salute,
what do you wanna modify exactly?

[eldetectorista]

Hello Good evening, I'm Gabriel from Argentina, I want to modify my TM-808 detector, I hear the waves as they bounce off instead of the horn, is it possible?

Greetings and thanks.


Hola buenas noches, soy Gabriel de argentina, yo quiero modificar mi detector TM-808, quiero escuchar las ondas cuando rebotan en ves de la bocina, ¿es posible esto?

Saludos y gracias.

[Funfinder]

With all my respect for the guys here helpin ya out gettin youre 808 to work,
but please better do yourself a favour and get some Jeohunter or Jeoscan
or anything like this!

Cause otherwise you're treasurehunting could lead into a frustrating demotivation!
I found an 1,5cm bullet 15cm below (0.75inch lenght at 6inch depth) 3 weeks ago
with Jeohunter almost half meter large coil and at the same time I can get very
deeeep stuff, too!

The tm808 is completly unpractical. Bearing the shovel on your sholder and leaving
your bag and finds somewhere - all this leads to "nowhere".
Never save your money at the wrong end.

[pourang]

tm808

hello the wire core transmit (coil) 82 trun for a tuning tm808.but not estabile.the system.and very very hard oprating system .but serch deeping up 10 meter detect object.but the old version tm (tm800) very good tuning for a deeping search.but tm808 no good ida for a tuning

[querrick]

tm808

sir pourang thanks for your help,i replaced all ics that you told for my tm808 cave mode and nows its okey..do you have any idea on how to improved this tm808 cave mode to dettect old treasure up to 15 meter?...and also please help to the correct ussage on this project tm808?

[pourang]

hello

i help you for a repairtm808

[pourang]

hello sir the best trasure hunter whites tm808 because very perfect and profitional but the all long rang detector (lrl) it is a toy not found the trasure. i working all lrl no good just a toy but i working tm 808 and found the rilck and...i work okm rover deluxe rover cii and.. okm just the toy i work the runebut(accrocate locators) better tha as okm.i buy and work any metal detector and lrl the best metal detector whites tm808+LRLMAN(arcjeo) tm808 can found the very old metal(trasure)deep serching 11 meter object 1m.50cm(+LRLMAN) but tm 808 new object metal 2m.2m just found the 6 meter but the very very old object metal found the 11 meter

your tm808 it is a new (3 volume or 4 volume)the tm 808 3 volume new and smd .but tm808 old 4 volume not smd beacuse esaly repair. are you Renovation?can you found the all ic tm808 in to the country?until help you for a repair.