Build me a “Super Pistol LRL”

[Qiaozhi]

Hi MIJ

The problem is i dont want to sell any PDK without SEALED the eletronics and coils.
The PDK device stay UNSTABLE when sealed. You know,i dont want OTHERS COPY MY PDK !!! it needs everything sealed impossible to CLONE.

When solved this little problem,i can sell a few for the friends.

You could always use a microcontroller to hide some of the inner workings, and pot the analog electronics in epoxy. You might even be able to pot the ferrite windings, but then you could not make any adjustments.

[J_Player]

Hi MIJ

The problem is i dont want to sell any PDK without SEALED the eletronics and coils.
The PDK device stay UNSTABLE when sealed. You know,i dont want OTHERS COPY MY PDK !!! it needs everything sealed impossible to CLONE.

When solved this little problem,i can sell a few for the friends.

Hi Morgan,

I remember reading in the coil section that it is important to watch the materials that you seal your coils in. Different epoxies and urethanes have different capacitance dielectric values as well as different insulating values. This means the material which you pot your circuit with can cause small electronic leakage and add capacitance that you will not find when the parts are in the air. I would suspect this effect is more important in the small signal/high gain conductors where a tiny amount of current leakage or a tiny change in the capacitance can cause unstable circuit operation. Other parts such as beeper amplifiers will probably not be degraded by covering them with epoxy.

You can check with potting compound manufacturers to see if you can find a compound which has published specifications that show very high dielectric value and very high resistivity so they will not leak current or change the capacitance in critical circuit parts.


Best wishes,
J_P

[MIJ]

Hi MIJ

The problem is i dont want to sell any PDK without SEALED the eletronics and coils.
The PDK device stay UNSTABLE when sealed. You know,i dont want OTHERS COPY MY PDK !!! it needs everything sealed impossible to CLONE.

When solved this little problem,i can sell a few for the friends.

Morgan,

Please add me to your list to buy the PDK-2 model or other model.

Talking of gold I thought you all would like to see this 15th Century Brooch found by my brothering law David about 4 weeks ago at a rally we went to hear in Sussex.

The picture was taken just after recovery and it had not been cleaned.

It has gone to treasure trove inquest to the British Museum for valuation.

A beautiful little brooch I think.

[takhslambos]

This machine can locate from a distance 1000 gold coins in a metal box?buried before 70 years?1 metre deep inside the ground?if yes I like to buy it.

WELL?CAN THE PDK LOCATE MY TREASURE?

[Morgan]

WELL?CAN THE PDK LOCATE MY TREASURE?

Yes

[Morgan]

WELL?CAN THE PDK LOCATE MY TREASURE?

yes,if it still there...

[Morgan]

Hi Morgan,

I remember reading in the coil section that it is important to watch the materials that you seal your coils in. Different epoxies and urethanes have different capacitance dielectric values as well as different insulating values. This means the material which you pot your circuit with can cause small electronic leakage and add capacitance that you will not find when the parts are in the air. I would suspect this effect is more important in the small signal/high gain conductors where a tiny amount of current leakage or a tiny change in the capacitance can cause unstable circuit operation. Other parts such as beeper amplifiers will probably not be degraded by covering them with epoxy.

You can check with potting compound manufacturers to see if you can find a compound which has published specifications that show very high dielectric value and very high resistivity so they will not leak current or change the capacitance in critical circuit parts.


Best wishes,
J_P

material used was the puliuretan epoxy ,i´m not satisfy with the results.

[Morgan]

Morgan,

Please add me to your list to buy the PDK-2 model or other model.

Talking of gold I thought you all would like to see this 15th Century Brooch found by my brothering law David about 4 weeks ago at a rally we went to hear in Sussex.

The picture was taken just after recovery and it had not been cleaned.

It has gone to treasure trove inquest to the British Museum for valuation.

A beautiful little brooch I think.

Very nice object and is good that goes for valuation,if museum not interested to buy,you can keep ;-)

Objects like this brooch(loop shape) create the best eletromagnetic field,the PHENOMENON,very easy located by PD or PDK.
or the CRYPTON??? maybe...

[J_Player]

material used was the puliuretan epoxy ,i´m not satisfy with the results.

puliuretan epoxy is known to be not the best material for dielectric and leakage of small currents. You are correct. There are better materials to use.

Best wishes,
J_P

[WM6]

puliuretan epoxy is known to be not the best material for dielectric and leakage of small currents. You are correct. There are better materials to use.

Best wishes,
J_P

You need to spray circuit with this

http://www.teslanol.com/deutsch/article/isolier.html

first, let it dry and then seal with epoxy.

[J_Player]

You need to spray circuit with this

http://www.teslanol.com/deutsch/article/isolier.html

first, let it dry and then seal with epoxy.

Another tip for high gain circuits is it is important to clean the circuit board and solder joints after the soldering is completed. A thin film of solder flux left on the conductors can make a path for electrical leakage in the high gain sections even when you cannot see the flux. It is common practice to clean the circuit boards with methylated spirits and let it dry before sealing it with coatings and potting. The cleaning of the circuit can also help when tuning the circuit so small signals are not lost with electronic noise from leakage across the conductors near the transistors.

Best wishes,
J_P

[Fred]

It is common practice to clean the circuit boards with methylated spirits (...).
Best wishes,
J_P

You should be careful when choosing your words, now gurus are going to be needed to to clean the boards from spirits traces...

[Morgan]

You need to spray circuit with this

http://www.teslanol.com/deutsch/article/isolier.html

first, let it dry and then seal with epoxy.

that is good ideia,is some kind of verniz spray,it will isolate the circuit and then pot with epoxy ,thanks

[Morgan]

You should be careful when choosing your words, now gurus are going to be needed to to clean the boards from spirits traces...

,yes,it will be a problem if Jinns stay around the LRL circuits.

[J_Player]

,yes,it will be a problem if Jinns stay around the LRL circuits.

This is not a problem for you. I see guru printed under your name.

Best wishes,
J_P