Polish Pi

[beiduo]

https://drive.google.com/file/d/1VdW...ew?usp=sharing

[bernte_one]

can you upload full sheme for construction of l741 / kts vco mod sheme? THX

[beiduo]

The voltage control of KTS is extracted, and you can achieve very good results by changing the C35 capacitor. The input terminal uses 10UF electrolytic capacitors to filter.

[beiduo]

[Bayu]

这是我制作的VCO视频，希望能帮到你 https://youtu.be/z2UugNldhRU

What is vco name?

[Bayu]

Hello
Dear Bayu
I have built Mr. Mickstv's VCO (4046) but i have some problems. Since you could build it, so i hope you can help me.
As you know, pin-1 of its first opamp must be adjusted to 0 mv. Do you remember your voltage?
Thanks

I didn't measure it, if your layout is in accordance with the MickTV scheme, your VCO will definitely work, and I use a separate audio Amplifire from the VCO

[beiduo]

好的

[Qiaozhi]

这是我制作的VCO视频，希望能帮到你 https://youtu.be/z2UugNldhRU

Please read the forum rules and make your posts in English.

[beiduo]

这是我制作的VCO视频，希望能帮到你 https://youtu.be/z2UugNldhRU

[h9361]

here the soil minerals are very high, so VCO without GEB will be difficult to control because the empty land from the target can be read by a machine, if the sens is set according to the soil, if we move the coil sometimes there are higher soil minerals, variations in soil types here are very make it difficult, I use ic lm324 for vco the result is better than using 2 opam ic, thanks for the advice

Hello
Dear Bayu
I have built Mr. Mickstv's VCO (4046) but i have some problems. Since you could build it, so i hope you can help me.
As you know, pin-1 of its first opamp must be adjusted to 0 mv. Do you remember your voltage?
Thanks

[Vadim18]

has anyone done a newer layout variant with integrated 4046 vco block, or a smd variant?
latest mod i have done was a external board with 4046 vco, but audio direct output form 4046 driven by two 2n2222 ist not the best sound
https://www.youtube.com/watch?v=p0sZnO0uaMw

Try RC filters for 4046 power and control voltage.

[bernte_one]

has anyone done a newer layout variant with integrated 4046 vco block, or a smd variant?
latest mod i have done was a external board with 4046 vco, but audio direct output form 4046 driven by two 2n2222 ist not the best sound
https://www.youtube.com/watch?v=p0sZnO0uaMw

[surfdetector]

This photo that I show would be the correct damping?[ATTACH]54992[/ATTACH]

Your picture looks ok. I did a video for coil damping that you might find helpful:
https://youtu.be/Gr__N4_k2Mc

[Carlos]

[QUOTE = Qiaozhi; 285703] La imagen del 560R muestra una forma de onda subamortiguada. La imagen de la resistencia de 1k muestra a?n m?s falta de amortiguaci?n. Supongo que el valor correcto de la resistencia de amortiguaci?n es 470R.
Puede ver en la imagen de 1k que el preamplificador se satura al riel negativo durante el flyback, y luego se satura al riel positivo antes de decaer a 0V. El valor correcto deber?a hacer que la salida del preamplificador se sature al carril negativo, seguido de una ca?da suave a 0V. La conclusi?n es que 1k es demasiado alto y 560R puede causar cierta inestabilidad. [/ QUOTE]
This photo that I show would be the correct damping?

[kt315]

The link is asking to sign in, is that correct ?

sorry i do not see that asking on your side. i get just a note ***@gmail.com is requesting access to the following file:

then i give the access.