Metal detector with double tone and reject discriminator- new schematic

[ivconic]

I think this should be proper wirement, agree?

[ivconic]

I think this TX will never work, wired as on schematic. Sasho must made mistake in a hurry?
Sasho can you comment this?
Thanks in advance!

[ivconic]

All Sasho's schematics are interesting. So i decided to draw pcb for this one. And i was just about to start when i saw this:

[farah676]

Thanks Very Much Dear Friends Please Upload PCB

[farah676]

thank very much for all schematic

pozdrav Saso

Niamam namerenie da si meria neschtoto s kogoto i da e.Znaia,4e wsi4ki
ste weliki.No nai welik e Flint,koito izmisli Magnum.

Bravo , u pravu si za MAGNUM , ja 8 godini radim sa 2 kanalnim magnumom, dva tona ID. Modifikacija koju sam dobio iz BG i svaka cast onom ko je tu modifikaciju napravio. Ja sam jos malo doradio neke sitnice i sad je to jako dobar aparat koji nikad necu da promenim.
Nadam se da razumes sta pisem .

[rajesh]

t/r locator

Total power consumption-40 ma
Potentiometer "tone"- Threshold
The value of c29,30,31-c35,37,38-c66,65-microfarat. 0.47=470nF
op10 and op11-lm393.
Oscilator schematic-correct.Work-30v amplitud
C4-coil compens.- not in search head .

Total power consumption-40 ma
Potentiometer "tone"- Threshold
The value of c29,30,31-c35,37,38-c66,65-microfarat. 0.47=470nF
op10 and op11-lm393.
Oscilator schematic-correct.Work-30v amplitud
C4-coil compens.- not in search head .

hi sasho hi all.
help me about this projrct with sasho please.
i want know what is the value of c29,30,31-c35,37,38-c66,65.wich range are they?
pf?nf?uf? the oscillator doesnt work with any simulators.where connect the emitter of q5, c1, c65? also head of r4?
why those power pin are differ from others? are the op10 and op11 393 or 339? if are 339 the pins are inaccurate.
and at the end c4 must be in search head or not?
please answer me in english.
best regards.

[rdec4]

TO: Sasho Varna Bulgaria

1. What is the function of the potentiometer with label "tone"?
It is Volume control regulator for sound/tone, or Threshold, or?

2. For C35, C37, C38 with value "0.47".
It is 470nF, or?

3. What is the total power consumption?

Thanks in advance!

[kt315]

согласен. все так и есть. я это уже раньше увидел и устранил по типу Вайтс Классик-Тесоро (стабилитрон либо два диода на выход компаратора. добавляют еше и конденсатор чтобы сгладить скрип). просто файл со схемой на работе, а я сейчас в отпуске. а то что широтная модуляция понял еще когда выложили схему фишер-1280. на той схеме все подписано. но глубокого смысла копировать ШИМ я не вижу...
удач.

To kt315
У "FISHER-1266" имеется ШИМ для уровня выходного сигнала .Это делает
выходной компаратор.Там произходит и установка порога звука.В твоем
"фишере" порога не будет.Звук будет возникат как взрив.Схемы нельзя вслепую копировать .

Привет.
Сашо

[kt315]

i agree. will change on 8xAA/NiMH=10,4V. in the schematic must be 5V+2*1N4148=5+1,6=6,6V. 9-6,6=2,4V of the dropout.
... thinking it is unprinciply

To kt315
Power problem .
bateri voltage is 9v.lm7808 ,lm7805-dropout voltage Vo is 2v.

[kt315]

to ktT315
Wherefore send me ‘sturm’ without double tone and reject discriminator

I refuse off a double tone way now. because more important thing as people really only need is the discrimination. or, by another words the discrimination with zero level. it give full possibility to relic digging despite there is not all metal mode. I present new version for release by geotechers.
yours