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DIY Stompboxes => Building your own stompbox => Topic started by: spoontex on May 14, 2022, 10:53:37 AM

Title: Neo Vibe Speed UP
Post by: spoontex on May 14, 2022, 10:53:37 AM
Hello,

How can I increase the speed of my Neo Vibe? It's slow compared to deja vibe, easy vibe, gypsy vibe and others.

Thanks!
Title: Re: Neo Vibe Speed UP
Post by: antonis on May 14, 2022, 11:15:43 AM
Study R.G. analysis : http://www.geofex.com/Article_Folders/univibe/vibeupdate.pdf (http://www.geofex.com/Article_Folders/univibe/vibeupdate.pdf)

In case you don't get your goal, come back and ask.. :icon_wink:
Title: Re: Neo Vibe Speed UP
Post by: spoontex on May 14, 2022, 11:22:30 AM
Quote from: antonis on May 14, 2022, 11:15:43 AM
Study R.G. analysis : http://www.geofex.com/Article_Folders/univibe/vibeupdate.pdf (http://www.geofex.com/Article_Folders/univibe/vibeupdate.pdf)

In case you don't get your goal, come back and ask.. :icon_wink:

down the R42 and R43 resistors?
Title: Re: Neo Vibe Speed UP
Post by: antonis on May 14, 2022, 11:38:32 AM
Althought it should be plane enough to answer with a "yes" or "no", it should be more creative to undestand what you're doing.. :icon_wink:

So, plz read 5th paragraph of LFO chapter here: http://www.geofex.com/article_folders/univibe/univtech.htm (http://www.geofex.com/article_folders/univibe/univtech.htm)
(it's only one and a half row but if you get the way particular time constansts work, your issue will be considered settled..)
Title: Re: Neo Vibe Speed UP
Post by: spoontex on May 14, 2022, 11:44:14 AM
Quote from: antonis on May 14, 2022, 11:38:32 AM
Althought it should be plane enough to answer with a "yes" or "no", it should be more creative to undestand what you're doing.. :icon_wink:

So, plz read 5th paragraph of LFO chapter here: http://www.geofex.com/article_folders/univibe/univtech.htm (http://www.geofex.com/article_folders/univibe/univtech.htm)
(it's only one and a half row but if you get the way particular time constansts work, your issue will be considered settled..)

Yes, R42 and R43. Thanks for the info!
Title: Re: Neo Vibe Speed UP
Post by: PRR on May 14, 2022, 02:19:03 PM
Almost always, the resistors are selected for the DC conditions and should not be changed much. The capacitors have no DC effect and can be changed a lot.

Also in this case, changing R means changing pot which is already paid-for and mounted. A few caps is usually cheaper and easier.

Three 0.47uFd will wobble twice as fast.