The Amazing Fet Circlotron by Mike Rothacher

[UltimateX86]

Hi

Amazing Circlotron with Vas stage :

what do you think ?

Ltspice files

 

[gionag]

Hi

Amazing Circlotron with Vas stage :

what do you think ?

Ltspice files

how to do you manage output offset voltage ?
i can see a good spot for a pot to set the bias... but i can't see how i can trim the output stage for 0 volt out.

At any rate... seems great !

 

[UltimateX86]

Hi

You could use pots in place of R8/R9

Thanks
Best regards
Sébastien

 

[gionag]

Hi

You could use pots in place of R8/R9

Thanks
Best regards
Sébastien

i think i am gonna build it out...
seems quite good on paper to be worth a test.

what do you think ?

 

[UltimateX86]

I replied to your email, I think that the version has TTA is good to achieve, I will do in September

 

[gionag]

I replied to your email, I think that the version has TTA is good to achieve, I will do in September

sorry mate.. didn't get any from you on email.
i will drop again my address on pm.

thanks
M.

 

[Itsmee]

A question for Mike Rothacher,

I saw the V-FETRON on your website AudioMaker | DIY Audio Projects & More, was it successfully completed?

I cant delete my pic!

 

[audiodesignguide3]

After the good result obtain with my hybrid Circlotron design using interstage transformer I would like to create a pure solid state design.

I have simulated many design and I see this characteristic, with the same bias the first keep 108mA and the others only 20mA.

This mean that the first design turn off the output device much later.