Pulse IB discriminator (by Sasho - Varna)

[6666]

This design is an interesting concept.
I cannot open the link to the original posts in thunting about this project

I am trying to figure out the coil information, are there any pictures ???
from the drawing it looks like

L1 = 60 windings or turns, using .35mm wire, with a coil dia of 250mm

L1.1= 24 windings of .35mm wire, with a coil dia of 130mm

L2= 200 windings of .12mm wire, with a coil dia of 130mm, this is a bit tricky, is L2 wound first then L1.1 wound over the top ?

all coils are screened, together or separate ?

dia = diameter

[6666]

Smity

you should be able to use just about any 741

http://pdf1.alldatasheet.com/datashe...S/UA741CN.html



click view data sheet then download

[6666]

NTE994m = lm566 = NE566
http://audiolabga.com/mal_cart/mal_c...FYsvpAodpmjfJw


so I am told, check the pins but


there are some on ebay, some in romania, one good deal 4x$17.00

http://shop.ebay.com/?_from=R40&_trk...All-Categories

[smity]

For 6666.
Many thanks. LM566, NE566 very much will raise the price of the M.D...
Can make the coil as ivconic?
"Dont know details. It is DD coill came with Relic Hawk....15 years ago. Very solid, stiff, Lexan...I dont have courage to try to open it and see whats inside.... I would have to use sander to open it...
I just experimented with few original coils i have. This one showed best performances, although Fisher 8" spider coil is also useable...."
It is possible to look for parametres at a forum

[smity]

cd4066 and cd4093 is not present. Probably to substitute on hef, hcf 4066bp and 4093bp? Is still 74HC4066N. Prompt please replacement on BC516.
Many thanks for answers...

[ODM]

There are modern substitutes for the 741 opamp and 4066 analog switch with better performance. If the original components are available, it's safe to build with the original component choices though.

[smity]

Whether the instrument will work better if to substitute 741 on LM318?

If there are newer and effective components can be better to use them? The Guru can will prompt variants of replacements (out-of-date chips, on newer).

I am simply gathered to make the order of details in the Internet shop...
With the big respect for you.

[6666]

From the data sheet

The 74HC4066 and 74HCT4066
CMOS devices are pin compatible with the HEF4066B.



The 74HC4066 and 74HCT4066 are pin compatible with
the 74HC4016 and 74HCT4016 but exhibit a much lower
on-resistance. In addition, the on-resistance is relatively
constant over the full input signal range.
.................................................. ................................................



.................................................. .................................................. ..

4093bp should be ok

[zum]

HI THERE AND HOW ARE YOU,,, I AM NEW AND I READ YOUR PROJECT AND I HAVE A SCHEMATIC FOR VLF SHAGOW DETECTOR BUT I AM NOT UNDERSTANG HOW IT WORK I WANT SEND IN THIS PAGE TO HELP ME TO UNSERSTAND IT BUT I DO NOT HOW CAN I SEND IT IF ANY BOADY READ THIS MASGE PLESE HELP ME

[6666]

the bc516 is just a darlington you can make one from two general purpose pnp's

[6666]

ZUM start a new thread and post your circuit in your thread

[zum]

is this detector detect gold

[zum]

Because tomorrow I begin puting it together and still got some doubts!!!

what can i use insteed ca3140 IC

[smity]

coil

Give more information on the spool 2Д. Who already made? A wire, diameter, coils... How customised a resonance? How reduced in a zero? I will be grateful

[zum]

CAN I USE TL072 INSTEAD CA3140 AND NE5534