Extra9 - NAVA Expansion Kits

Discuss mods, hacks, tweaks, etc.

Re: Extra9 - NAVA Expansion Kits

Postby gwpt » Dec 20th, '20, 02:28

Thanks KlangGenerator,
My case is still in bubble wrap, so I hadn't noticed them yet!
gwpt
 
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Re: Extra9 - NAVA Expansion Kits

Postby lytrix » Jan 28th, '21, 19:18

I've also filled in the form to order an Extra9 kit last week. Hopefully one step closer to reach 50 buyers!
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Extra 9 Hihat humming problem

Postby plaque@aon.at » Jun 5th, '21, 06:11

Hello there!
I am almost finished with the E9 mod.
Nava was tested without mod: perfect.
Everything works fine with the mod, but when i switch in the filter on the Hihat, it basically works (HP/BP/LP) but with terrible hum on it, changing a bit when turning cutoff or envelope on the E9. Sounds a bit like a grounding problem...
I built a second E9 pcb - with exactly the same behavior. I built it very carefully.

Has anyone had similar issues. Or already got the HH filter working on the E9?

Thank you very much for all comments!!!
plaque@aon.at
 
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Re: Extra9 - NAVA Expansion Kits

Postby gihaume » Jun 6th, '21, 16:23

gihaume
 
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Re: Extra9 - NAVA Expansion Kits

Postby plaque@aon.at » Jun 11th, '21, 14:19

@gihaume
Thank you! With another powersupply most of the hum is gone.
There is still some humming depending on the position of cútoff and envelope potentiometers....not a psu problem any more..
Someone wrote: "At last I had to change some resistors value to get the HH filter quiet. I replaced R71 for a 10K, R72 for a 200K and R86_2 for a 10K. This lower the level reduction to the filter input and the filter output at the same time."

Do i really need to modify the HH Filter circuit to get the signal clean?

Also, when i switch the filter in there is always a loud "click" like there is DC on it....is that normal, or does the filter switch in silently on your device?

Thank you!!!
plaque@aon.at
 
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Re: Extra9 - NAVA Expansion Kits

Postby serum114 » Jul 6th, '21, 15:03

plaque@aon.at wrote:@gihaume
Thank you! With another powersupply most of the hum is gone.
There is still some humming depending on the position of cútoff and envelope potentiometers....not a psu problem any more..


You should ground the enclosure also. The circuit will still be a little noisy but this the S-P filter.
serum114
 
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Re: Extra9 - NAVA Expansion Kits

Postby bizillcizole » Aug 16th, '21, 18:13

I recently finished my build with Extra9, and had some issues with the clap circuit. The envelope seems to be retriggering constantly so that it outputs a saw wave, causing the clap to sound continuously without being triggered. Bypassing the extra9 envelope circuitry, the clap behaves as expected and sounds good. I checked continuity and values of all passive components on the Extra9 board and everything seems fine. Does anyone have any idea if the envelope IC (a counter) could be defective? Could something else be responsible for the problem?
bizillcizole
 
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Re: Extra9 - NAVA Expansion Kits

Postby Kotare » Sep 4th, '21, 22:31

Hi all. Does anyone have a spare extra 9 kit to sell?
Kotare
 
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Re: Extra9 - NAVA Expansion Kits

Postby kennymester » Sep 8th, '21, 21:09

Just bought myself one of the last runs of the NAVA extra 9 cases from Erica Synths. Looking to now acquire all the parts to build one. Are the Extra 9 Kit+ versions available for purchase?

Thanks!
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Joined: Sep 8th, '21, 21:06

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