Mineoro 2-Box -- 492 feet range?

[hung]

I saw carefuly the Antenna and didnt find any Infra Red,maybe its inside...

Maybe there isn't... And it's in fact a second regenerative coil.
Maybe... There is...

[Max]

Important note:
R1(circuit2)
R5(circuit3)
R1(circuit6)
are the same(red,brown,red,black,white,golden)
You can see one of them in the center of this photo.[ATTACH]3701[/ATTACH]

Hi Morgan,
from what I know that color scheme have no meaning :

red,brown,red,black,white,golden

You have to recheck it cause it's maybe as this:

red,brown,red,black,gray,brown

If so , resistor values are :

2120 ohm 0.05% (tolerance) 100ppm/°K (temperature coeff.)

Kind regards,
Max

[Max]

max, you certified me?

circuit 1 regulator
circuit 2 modulation and filters?
circuit 3 amplifier?
circuit 4 sound tac tac
circuit 5 preamplifier?
circuit 6 oscilator

apologies my bad english
hups
detectoman

Hi detectoman,
we need all schematics to say better ...but that's my idea...

I think:

PCB1 = voltage regulator based on LM317 IC
PCB2 = rf mixer
PCB3 = rf preamplifier ?
PCB4 = square wave oscillator (that probably drive TX coil)
PCB5 = regenerative crystal demodulator ?
PCB6 = threshold detector and led driver

Kind regards,
Max

[Max]

Hi,
this is pcb1 schematic and my calculation gives exactly 9volts output for it: so at middle of battery voltage when they are at full charge.

So know we know that circuit works at 9V stabilized supply.

Kind regards,
Max

[Fred]

Here:

http://www.samengstrom.com/nxl/10116/5_band_resistor_color_code_page.en.html

Imputing the code gives a value of 212 R./ 0.25%
Fred

[Esteban]

Maybe there isn't... And it's in fact a second regenerative coil.
Maybe... There is...

I speak with Alonso and he told me there are IR, maybe not in it, maybe in other variation/modification of same pistol. For the same reason old PDCs don't have IR and other modern PDC contain this.

In few time I'll have access the schematic.

About equilibrium, this is the adjustment in the best sensibility point capable to be dislocate for the signal received by the IR.

[Morgan]

Resistor

Hi Morgan,

Please could you also check the connectivity of the wiring to the antenna, i.e. what is the resistance measurement between the different wires?

Hello
I take out resistor and the measurement 18.09 (using 20kohm),so its something like 18k or 19k.
I hope we discover all electronic mistery aroud this device...

[Morgan]

The Antenna enigma LRL

Hi Morgan,

Please could you also check the connectivity of the wiring to the antenna, i.e. what is the resistance measurement between the different wires?

Hello
This is more complicate because for acurate measurements i must take out all the 7 cables who goes to antenna,i already glued all the circuits into wood box...
We will see,i will do this if Esteban cant help us with the Directional Antenna.

Kind regards

[Morgan]

Hello
Its 18k or 19k

Kind regards

[detectoman]

max:?

circuit 1 regulator
circuit 2 modulation and filters?
circuit 3 amplifier?
circuit 4 sound bip bip ( correction ) may be i am novicie'
circuit 5 preamplifier?
circuit 6 oscilator (these early oscilator basif) for coil, tipe ch. rakes ha, may be

detectionman

[hung]

I speak with Alonso and he told me there are IR, maybe not in it, maybe in other variation/modification of same pistol. For the same reason old PDCs don't have IR and other modern PDC contain this.

Exactly. This one apparently ain't got one.
Thanks for your answer Esteban.
I already have my conclusions.

About equilibrium, this is the adjustment in the best sensibility point capable to be dislocate for the signal received by the IR.

As this may not have any IR, it's serving as a low Q and low induction receiver coil to match the front loop. It's working on the relative near field instead of a mid distance or far field.

[Qiaozhi]

Hi Morgan,
from what I know that color scheme have no meaning :

red,brown,red,black,white,golden

You have to recheck it cause it's maybe as this:

red,brown,red,black,gray,brown

If so , resistor values are :

2120 ohm 0.05% (tolerance) 100ppm/°K (temperature coeff.)

Kind regards,
Max

This resistor coding seems to be a mystery. Personally I would have thought it was 2.12k as well, although Fred showed that it may be 212 ohms.
Now Morgan has removed and measured it - and it's 18K.
Perhaps the colours have been misread.

[Morgan]

this resistor its grey,and the colours -brown,white,black,red,brown,red...one of brown colours looks to me gold ,but its brown,sorry...
The measurment is 18.09k

[Qiaozhi]

this resistor its grey,and the colours -brown,white,black,red,brown,red...one of brown colours looks to me gold ,but its brown,sorry...
The measurment is 18.09k

Thanks!
In that case it's a 19K 1% resistor.

[Fred]

So its 6 colours!
Now its different,read backwards, using the calculator:

http://www.samengstrom.com/nxl/2020/6_band_resistor_color_code_page.en.html

It give 19 k 50PPM/ºC
Now that´s a high precision resistor,you should be able to calibrate your tester with it!
Fred.