Gilbert Treasure Ray Aqua Pro TR

[Esteban]

Anybody knows the datas of the Tr and Rec coils of the Gilbert Treasure Ray Aqua Pro TR?

[joecoin]

Estaban,

I know this is an old post, but did you ever find out about the Treasure Ray Aqua Pro TR?

joe

[Esteban]

Hi Joe

Can't find the data coils.

[joecoin]

Sorry, I don't understand. What do you mean "data coils"?

Thanks,

joe

[Esteban]

I wish to know the characteristics of both coils: number of turns, diameter, inductance, AWG, etc.

Regards

Esteban

[hung]

Hi Esteban,

Usually it's quite simple to estimate the coil based on capacitance, In the picture you provided, divide the value of the varicap in pf by the frequency in Mhz the circuit works. The result will be the microhenries of the coil.

We use a very simple osocilator which I use to estimate coil frequencies along with a frequency counter.

From that use the usual formulas to estimate number of turns.
Bear in mind the the thicker the gauge of the coil winding, the higher the frequency, ibut mileage may vary.

PS. I emailed today.

[Qiaozhi]

Usually it's quite simple to estimate the coil based on capacitance, In the picture you provided, divide the value of the varicap in pf by the frequency in Mhz the circuit works. The result will be the microhenries of the coil.

Actually the correct formula is: f = 1 / (2 * pi * sqrt(L/C))
Rearranging for L gives: L = 1 / (w^2 * C), where w = 2 * pi * f
For example, if you have L=6mH and C=42nF, then f=10KHz

By your method: L = 42000 / 0.01 = 4.2u
Presumably you didn't mean 4.2e-6 uH, so I assume the answer is supposed to be 4.2uH, which is also incorrect.

Using the correct formula gives: L = 1 / ((2 * pi * 10k)^2 * 42n) = 6mH (correct answer).

[joecoin]

I wish to know the characteristics of both coils: number of turns, diameter, inductance, AWG, etc.

Regards

Esteban

Is this from the schematic for the Gilbert Treasure Ray Aqua Pro TR?

[Esteban]

Hi Hung, hi Qiaozhi

Thanks very much. At "simple sight" this is in the range of 60 turns wire .30 mm 22-25 cm diam, but I don't know the real diameter of the search coil.

Joe, yes is from the schematic for the Gilbert Treasure Ray Aqua Pro TR.

[hung]

divide the value of the varicap in pf by the frequency in Mhz square the circuit works. The result will be the microhenries of the coil.

Sorry Esteban, that's the detail missing.

I was in a hurry and did not type this, causing also mistakes in the spellings.

By experience, I use this formula/aproach which will lead you to the real thing for sure.
Make sure to check the coil's resonating frequency later with a grid dip meter.

For the search coil, use the aircore loop formula. I think in the case above gauge 29 magnet wire will work.

Cheers.

PS. Coils are my passion.

[Esteban]

PS. Coils are my passion.

Nice to read it!

[joecoin]

Hi Hung, hi Qiaozhi

Thanks very much. At "simple sight" this is in the range of 60 turns wire .30 mm 22-25 cm diam, but I don't know the real diameter of the search coil.

Joe, yes is from the schematic for the Gilbert Treasure Ray Aqua Pro TR.

Can you send me a copy of that schematic? And any other information you have about the Aqua Pro?

joe