Pim Puls .XR 7

[Ferric Toes]

please read my opus for a future http://www.geotech1.com/forums/showt...here-share-out

Alright for those that have sun . We are blessed with rain, floods, hail, snow, frost, gales, thunder and lightning, fog, and when the sun does come out the air temperature is hovering close to freezing at this time of year. Forecast as we head to the end of the week...getting colder.

Eric.

[andon80]

Friends with this xr7similar circuits from dbp2010 I think but it's not the same .is it true?

[Orbit]

Alright for those that have sun . We are blessed with rain, floods, hail, snow, frost, gales, thunder and lightning, fog, and when the sun does come out the air temperature is hovering close to freezing at this time of year. Forecast as we head to the end of the week...getting colder.

Eric.

I already get a phobia the climatic developments !

[6666]

Alright for those that have sun . We are blessed with rain, floods, hail, snow, frost, gales, thunder and lightning, fog, and when the sun does come out the air temperature is hovering close to freezing at this time of year. Forecast as we head to the end of the week...getting colder.

Eric.

Brrrrrrrr we are still getting +40'C in the outback

[bernte_one]

i get same good sun like kt315 next days and also low temperature

hope that Orbit put layout files here in thread, maybe rar Container or zip

like to do some changes

[eclipse]

I'm missing the 3096 but the rest worked.
At this time I've tested the power and oscillator section. 80-100Hz, TX is 80-350uS, sample widths are 50uS. D is 110uS and it's 3000uS before TX.
I get sample2 too close to Sample1 so I may need to re-adjust things and also freq is not too good as I need to get it to 120Hz so optimization there also be needed.

[skorpio]

[Orbit]

I'm missing the 3096 but the rest worked.
At this time I've tested the power and oscillator section. 80-100Hz, TX is 80-350uS, sample widths are 50uS. D is 110uS and it's 3000uS before TX.
I get sample2 too close to Sample1 so I may need to re-adjust things and also freq is not too good as I need to get it to 120Hz so optimization there also be needed.

80HZ is the lowest 100hz maximum frequency insert transistors instead of ca 3096 npn beta 280 pnp beta 40 .. 2n4124 and 2n4126

[eclipse]

Oh no, I recieved the CA3096AE long time ago and it worked.
One thing to watchout for - without the volume pot attached LM386 heats up alot!

[Orbit]

Oh no, I recieved the CA3096AE long time ago and it worked.
One thing to watchout for - without the volume pot attached LM386 heats up alot!

You should not do you use ujt tr 4870 ?
I'll check that part of the sheme about 386 !

[eclipse]

I used 2N3773 - the photo few posts up there is the actual picture of my board.
The LM386 is not a big trouble, though I really felt the heat from few cm of the chip with my fingers, without the pot connected.
Once the volume pot is connected the chip behaves okay.

Tested with ~500uH coil and when the metal target is very near the coil the signal blanks out completely.
This may require higher inductance coil (1000uH)+ which I don't have, but interesting to see if that gives improvement.

[kadir6141]

hi frinds
2N4870 what can we use instead.

[Toros]

ECG6410

[skorpio]

https://youtu.be/W72RogUg_Iw

[Orbit]

https://youtu.be/W72RogUg_Iw

Yes so it works !