Lrl from Italy

[FrancoItaly]

Franco What is the best voltage?

12V stabilized (2 X 9V battery)

[WM6]

Horizontal.

You mean after 2l of Barbera?

Is not in normal status better vertical?

[zixelll]

What is the best voltage for calibration?

[FrancoItaly]

What is the best voltage for calibration?

Look at helps:

[zixelll]

Hello Franco thanks for the capacitor thermometer instead of 22p to calibrate

[zixelll]

What capacitor Franco is suitable for this device? ceramic . mkt .....

[FrancoItaly]

What capacitor Franco is suitable for this device? ceramic . mkt .....

Ceramic, as it's a high frequency device. 8Mhz for high gain amplifier and 100MHz for input stage.

[zixelll]

What can be done to get the best performance for precious metals

[zixelll]

Transmitter bc550 Is it good for this circuit

[FrancoItaly]

[QUOTE=zixelll;155959]What can be done to get the best performance for precious metals

I think nothing, but it is already a good result that iron is not revealed.

[zixelll]

What should be done Iron removes from other metals

[zixelll]

Hi Franco, instead of using a 22p capacitor of 20 p, will there be a problem or is it 22p good?

[FrancoItaly]

Hi Franco, instead of using a 22p capacitor of 20 p, will there be a problem or is it 22p good?

No, my lrl works well from 0pF to 33pF, there is anyway the parasitic capacitance of base/emitter junction of TR2 (about 10pF).

[zixelll]

Thank you guides from Varibell used to calibrate old gold

[zixelll]

The best voltage for a few volts is calibrated