Whites Surf PI schematic

[dbanner]

On the other hand, if this is what you have already, then try them to see results. Below 1khz might be ok to use them.

[dbanner]

Do not use wires wound pots. They essentially present themselves as having inductances ( self inductance)which are prejudicial to these circuits. They are for high power applications, and other things.
It also depends on what type of wire wound pots you have, there are various types made for specific applications.

[nonkapo]

Another question. Do you think it is allright to use wire winded potentiometers all over the circuit? I'm just woriyng a bit cause they may have some induction or it is neglectable? Thanks.

[nonkapo]

Current progress

The current progress...Did not manage to get 5mm raster capacitors here:-(. Order them back in Bulgaria and they arrive in one day:-)). Will continue when the vacation started.

[nonkapo]

Thanks, noted. Just receive the boards from Lituania. Checking them reveal matching of the exact version 1.2. Quality is good, let's see when i get all assembled what will be the final result ;-). Will update you here.

[waltr]

Yes, even lower Voltage ratings are ok. I use 25 & 50V caps.

For most of the caps higher tolerance is not a problem. However, the caps in the Integrator (C5 & C6) should be matched to the same value as best you can. This also includes the 4 resistors, R13-R14, R15-R16 pairs. Exact values are not critical but same value in each pair is. Only these 6 parts need to be matched all other parts are not critical and remember that there are adjustment pots which negate the need for tight tolerance parts.

[nonkapo]

One more question with the same capacitors in mind. I hope it is ok to use all the capacitors from the smaller tolerance PStack 5% type instead of 10%Pfilm but not the vice versa? When i was involved in the HAM radio i remember that 5% tolerance of any component is all right but in this particular case i do not like to land with not working device. Also for the resistors the tolerance given is it for their stability on temperature or just manufacturing tolerance?Thanks.

[nonkapo]

Thanks, noted, so even lower voltage will do.

[waltr]

Good evening.
Looking at the parts list i did not see the voltages of the polyester capacitors. I know that the power is only 12 volts but i gues the coil circuit must be susteining higher voltages, right? Is 63 volts enough?
Thanks

I do not see ANY caps in the High Voltage (coil kick-back) part of the circuit. So all of these caps are in low Voltage circuits (12V) so 63V rating is good.

[nonkapo]

Good evening.
Looking at the parts list i did not see the voltages of the polyester capacitors. I know that the power is only 12 volts but i gues the coil circuit must be susteining higher voltages, right? Is 63 volts enough?
Thanks

[nonkapo]

Good morning, just lurking, ordered a surf pi 2 kit - waiting to start assembly.

Check you private messages

[Myntmaster]

Hello colleagues.
My most common surf. Nothing special, but it works well.
I mainly search with a detector on the sea in a diving suit, I walk a maximum in the throat, sometimes on lakes.
All videos in Russian. But you can see pictures.
https://www.youtube.com/watch?v=Yq2QAb3nI6U
https://www.youtube.com/watch?v=IvudaMaL7Dw&t=16s
https://www.youtube.com/watch?v=2_pII51qKS8&t=9s
https://www.youtube.com/watch?v=mKzxfN3Vk2U
https://www.youtube.com/watch?v=ELS2ocag_zE&t=1099s

[Rumcajs]

Hi,

The dumping resistor (about 390 R/1W) is critical.
Tuning the Surf: http://www.adrianandgenese.com/blogg...rom-a-diy-kit/ Step 4
Please translate this Section (see my link Step 4) with Google!


Ak neide, Hyena nick is zije v Ceskej Republike, skúste pítajte ho.
Pevne verím, ze bude t'a pomáhat'. Byvam v Uhorsko.

[scs]

Yes. Work perfectly. Change R9 to 2 k.

[bernte_one]

maybe we can adapt the pcb layout from sascho to sprint layout
it would better for diy than a bad Quality pcb picture