2 boxxxx :)

[Qiaozhi]

Last one - page 75:

[chemelec]

What about Replacing Q1, Q2 and Q3 with an LM386.
(Possibly also a Trimpot for a Preset Volume adjust, which could be a changed to a regular pot if someone wants that.)

good idea, Gary!

I Don't have that Crystal, the Closest I can come to it is a 27 mhz CB Crystal.
All that will probably do is change the resonant frequency and coil size a bit.

clock crystal 32 kHz is very commonly used. you can find it on old system PC board without a problem. all old and new China hand clock with LSD has it. but if to use [xx] mHz the divider will take some additional power loading I see 26 kHz crystal in Whites schematics. is it accessability in your world? I do not see a problem, if you will take 100 kHz crystall. ceramic crystalls on 300-400 kHz you can try to ask in a shop, used in TV remote control.

Other than that, I believe I have all the parts in my stock.

ALSO:
Chris2 WROTE:..but you still need the GATE IC for the TX circuit!

use 4069 or 14069. no a risk!

I Assume that is where these Two, 1N4150 Diodes are to be used?

1N4150 is such as 1N4148 but on more low voltage. there are not a big difference what diodes you want to use in this schematic. again, no a risk.

WOOPS, Sorry I Mis-Read that Frequency.
Always Thinking in Mhz.

But No I Don't have easy Access to a 32 Khz Crystal.
I live in a LITTLE Town, Population 485, Far from any suppliers.

Yes I know that 1N4148's will Replace any of the diodes.

[Chris2]

Hi Chemelec,
This is a crystal used for digital watches (according to an electronic catalogue). It should be easy to find.
Chris

[detectoman]

para nelson:

tu necesitas un detector de dos antenas tubulares y muy potente

mira hermano, ese detector de rakes pudiera ser muy eficiente, el problema esta en conseguir los capacitores antiguos, y no se que sustituto podrias hallar para los transistores, yo creo que debes preguntar a quienes armaron ese detector, y preguntar si ese detector se usa con correa o sea para llevarse al ras del suelo, pero si ese detector puede detectar desde llevarlo asido del travesaño de madera, pues yo creo que eso seria un enorme adelanto, ya que en los tipos de dos cajas, para que sean eficientes es necesario llevarlos casi pegados al suelo, y como tu habias dicho que necesitabas un dos cajas para buscar entre grandes rocas, tesoros de piratas, un dos cajas rasante al suelo no te serviria de mucho, en ese caso yo te recomendaria uno mas potente como los de antenas de tubo, o sea como el tm808 de white esos si se pueden manejar en alto para que no le estorben las piedras, pero si se tratara de comprar uno de esos que son de los mas potentes, yo he oido que hay uno de marca discovery no recuerdo que modelo es nuevo y automatico y que es el mejor, tambien el tm808 es automatico, y es muy potente, pero no se su eficiencia, no te recomiendo los de dos antenas y de ajuste null manual pues se precisa de mucha experiencia para poder nivelarlos y mienten si no se calibran exacto
ok pues yo creo que si ese antiguo lo pudieras armar seria lo mejor, pero solo que no necesitaras llevarlo de la correa junto al suelo, como te digo las piedras lo estropearian todo
ok un saludo nelson
detectoman mexico
for nelson: your you need a detector two tubular antennas and very powerful brother watches, that detector of rakes could to be very efficient, problem this in to obtain capacitores old, and not that substitute podrias to find for transistors, I believe that you must to ask those who armed that detector, and to ask if that detector uses with strap that is to take to evenness of ground, but if that detector can detect from taking taken root it of the wood crosspiece, because I believe that that serious enormous advance, since in the types of two boxes, so that they are efficient is necessary to take almost beaten them to the ground, and like your habias said that you needed two boxes to look for between great rocks, treasures of pirates, two boxes grazing to ground not you serviria of much, in that case I you recomendaria one but powerful like those of antennas of tube, that is like tm808 of white those if they are possible to be handled in stop so that the stones do not hinder to him, but if she were to buy one of which are of but the powerful ones, I I have oido who am one of mark discovery nonmemory which model is new and automatico and that is the best one, also tm808 am automatico, and am very powerful, but not its efficiency, I do not recommend those to you of two antennas and of manual adjustment null because it needs much experience to be able to make level them and lies if they are not calibrated exact ok because I believe that if that old one you could arm the best thing to it serious, but single than you did not need to take it of the strap next to the ground, as I say stones to you estropearian everything ok a greeting nelson they detectoman mexico

[nelson]

Two box

Hi Qiaozhi and Detectoman.
Qiaozhi, thanks for those pictures of the book.
I ll take a look and see what can i do about this circuits.
Detectoman, yes i think i must see what circuit fits best my needs, so i ll keep in mind your support.
Regards and saludos hermano
Atte.
Nelson

Last one - page 75:

[kt315]

I live in a LITTLE Town, Population 485, Far from any suppliers.

Ivan lives in Vyborg, population 78500. 130 km from Sankt Peterburg.
I live in a town with population 22000. 180 km from capitol Vilnius.
good start point, imho...

Nelson? Qiaozhi? Detectoman?

[Qiaozhi]

I live in a LITTLE Town, Population 485, Far from any suppliers.

Ivan lives in Vyborg, population 78500. 130 km from Sankt Peterburg.
I live in a town with population 22000. 180 km from capitol Vilnius.
good start point, imho...

Nelson? Qiaozhi? Detectoman?

I live in a small village, population approx. 80.
93 miles (~150 Km) from central London.

[Geo]

I live in a small town (Karditsa), population approx. 45000.
300 Km from Athens. There is only one shop with electronics components (IC's..resistors..etc), what to do...

[detectoman]

hello every vary kt315

i live in mexico,in frontier whit usa, ( united states of america)in juarez for my componentes are no problem, or, i travel 100 km,

hello nelson the transistor sustitute for two charles rakes, what show qoazy , two boxs is: nte 159 or- bc558 is one pnp
i think these detector old, is one best detector, whit moderns inovations,best what? sustitute for these tubular condensers, the tubular early condenser is major, these detector is one probable very good prospecte

detectoman

[chemelec]

Just so you know I'm Working on it, Here is my Preliminary PCB Design for this TR Locator.

http://www3.telus.net/chemelec/Proje...ocator/PCB.png

Got a Few Things to Fix up yet.

Moreto come soon.

[nelson]

Two Box

Ok friends. Good idea KT315. I m from Santiago city, which is the capitol of Chile, South America. We are to the West of Argentina.
Gary, good point of staart. I compared your pcb with the original tr locater and there are lots of differences. Gary what software are you working to made pcd and schematics.
Detectoman, thanks and i ll take a look to my book replacement to see if i can get older components.
Regards
Nelson

Just so you know I'm Working on it, Here is my Preliminary PCB Design for this TR Locator.

http://www3.telus.net/chemelec/Proje...ocator/PCB.png

Got a Few Things to Fix up yet.

Moreto come soon.

[chemelec]

Ok friends. Good idea KT315. I m from Santiago city, which is the capitol of Chile, South America. We are to the West of Argentina.
Gary, good point of staart. I compared your pcb with the original tr locater and there are lots of differences. Gary what software are you working to made pcd and schematics.
Detectoman, thanks and i ll take a look to my book replacement to see if i can get older components.
Regards
Nelson

Here is my Revised Schematic:
http://www3.telus.net/chemelec/Proje...TR-Locator.png

The PCB is Now Completed and I will assemble it and see if it works over the next few days.

The PCB is done in "Quick Route 1".
Its an OLD, Registered PCB program I bought years ago from England.
It was made to operate for Windows 3.1.
Does 8 Layers, plus top and bottom screens, plus much more. Even has auto-routing, but I never use it.

The Entire program is under 500Kb and has good graphics.

The Schematics are done in "IPPlus" a software program that came with one of my Digital Cameras.

I personally have no use for this detector, Just Doing this for you guys.

Take care....Gary

[detectoman]

very thanks chemelec for your dilligent support, and ideas, is expert, and active, you is one special young my congratulations for you and for you dinamics person

detectoman

[detectoman]

Here is my Revised Schematic:
http://www3.telus.net/chemelec/Proje...TR-Locator.png

The PCB is Now Completed and I will assemble it and see if it works over the next few days.

The PCB is done in "Quick Route 1".
Its an OLD, Registered PCB program I bought years ago from England.
It was made to operate for Windows 3.1.
Does 8 Layers, plus top and bottom screens, plus much more. Even has auto-routing, but I never use it.

The Entire program is under 500Kb and has good graphics.

The Schematics are done in "IPPlus" a software program that came with one of my Digital Cameras.

I personally have no use for this detector, Just Doing this for you guys.

Take care....Gary

very thanks chemelec for your dilligent support, and ideas, is expert, and active, you is one special young my congratulations for you and for you dinamics person

detectoman

[kt315]

hi All. I did revise Gary's schematic, my viewpoint you will note there. I hope now schematic is clear.
regards