ИГА-1 Russian Long Range Locator

[Morgan]

PDK-3

Welcome back Morgan,
thanks for the report .
By the way, I guess that on the second day, the PDK-3 had given signals , in contrast with the other LRL's...

yes it gave signals as well as the PDK-2.1, about Mineoro and Iconos they not locate the spot but this not mean they are useless,maybe in diferent ground or weather conditions possibly they work as LRLs...

[Morgan]

Well, I was sick, dear Morgan. There was no time for testing and research ... Maybe this spring ...
Regards!
Sneshko

ok

good luck !

[humhum]

Welcome Master Morgan, How are you.

[Pahom]

The project finished
I solved the stability problem but found a new one. Sensitivity is not so good.
Maybe i burned the Mos K140UD13.
I am looking to order some new but the shop that i ordered existings ICs there isn't at ebay now, don't know why.
Any way one more photo

Full analogue of the given chip-К140УД13 Is the Chip µA727M is a precision pre-DC amplifier with differential inputs, built according to the scheme of modulator-demodulator (MDM).

[Geo]

uA727 is not a MDM chip.
It is a temperature controlleddifferential preampl.
Here is all the secret....
uA727 needs a clear signal of phenomenon so to amplify it.
UD13 amplify the total signal (adds the noise to the background signal).

[tanrila]

uA727 is not a MDM chip.
It is a temperature controlleddifferential preampl.
Here is all the secret....
uA727 needs a clear signal of phenomenon so to amplify it.
UD13 amplify the total signal (adds the noise to the background signal).

replicate К140УД13? My be amp ic 358 or lf412 .... ?

[Geo]

At IGA-1 schematic you can't replace the UD13 with other chip, even if you replace the first 3 ic's with a very low noise ampl IGA will not work.

[tanrila]

At IGA-1 schematic you can't replace the UD13 with other chip, even if you replace the first 3 ic's with a very low noise ampl IGA will not work.

Thanks big master geo and happy New year

[Pahom]

It's not about ud13 or its equivalent. I found out that the scheme with errors and repeat it was not who could not. And they write about it on forums in Russia

[Geo]

I don't agree. Schematic is OK. My Iga works ok near the city.
Far from City don't catch something but as Dragomir said (he own an original IGA) Iga don't work at all places, especially near the sea.

btw... Pahom can you give any adress of Rusian forum that speak about IGA???

[Pahom]

I don't agree. Schematic is OK. My Iga works ok near the city.
Far from City don't catch something but as Dragomir said (he own an original IGA) Iga don't work at all places, especially near the sea.

btw... Pahom can you give any adress of Rusian forum that speak about IGA???

Otvravil on e-mail. On the manufacturer's website, look carefully there are documents in pdf format there and the diagram and user manual.

[Geo]

I have read everything on the manufacturer's site and on Реальная нереальность forum.

[humhum]

Реальная нереальность

[Geo]

What are you laughing

[humhum]

What are you laughing

of the itself word , not of You