Vacuform - Vacuum tube diode SVF

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Quinie
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Re: Vacuform - Vacuum tube diode SVF

Post by Quinie » Mon Oct 28, 2019 5:06 am

pedroflute wrote:IS JAKUB OK? He disappeared & is not answering emails, texts, voice calls, etc... Anybody knows if he is OK?
This makes me worrie about a fellow wiggler. Any news? is he oke ?

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Yes Powder
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Post by Yes Powder » Mon Oct 28, 2019 6:50 am

I sent him a PM after seeing Pedro's post, but haven't gotten a response. Looks like he hasn't been here since the end of August.
Here's hoping he's okay.

pedroflute
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Post by pedroflute » Mon Oct 28, 2019 1:27 pm

Hi dear all... Jakub responded to me finally, & He is OK... I take he has been a bit overwhelmed with activity/work stuff. but thank God he is ok... Phewwww!!! Blessings!!

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Yes Powder
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Post by Yes Powder » Mon Oct 28, 2019 1:57 pm

Good to hear :tu:

Quinie
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Post by Quinie » Mon Oct 28, 2019 1:57 pm

pedroflute wrote:Hi dear all... Jakub responded to me finally, & He is OK... I take he has been a bit overwhelmed with activity/work stuff. but thank God he is ok... Phewwww!!! Blessings!!
This msg made me smile ;)

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luchog
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Re: Vacuform - Vacuum tube diode SVF

Post by luchog » Sat Dec 28, 2019 1:04 pm

Anyone know if Jakub is taking orders yet? Finally have my workbench (sort of, mostly) set up and would love to get started on building this.

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metasonix
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Re: Vacuform - Vacuum tube diode SVF

Post by metasonix » Fri May 22, 2020 5:38 pm

Checking in--I am still interested in buying one to try out.

Anyone out there??

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artilect99
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Re: Vacuform - Vacuum tube diode SVF

Post by artilect99 » Sun May 31, 2020 9:41 pm

So one year later... still interested in the Eurorack kit if it ever comes around!

B0bcat
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Re: Vacuform - Vacuum tube diode SVF

Post by B0bcat » Sun May 31, 2020 9:49 pm

me too!
WTB: Plan B / SubCon Model 15 VCO, Plan B Model 12 VCF, ADDAC 805v1, MakeNoise QMMG

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geh2oman
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Re: Vacuform - Vacuum tube diode SVF

Post by geh2oman » Sun Jun 28, 2020 3:19 pm

Count me in too!

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BARD
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Re: Vacuform - Vacuum tube diode SVF

Post by BARD » Thu Jul 02, 2020 6:25 pm

Hi all
It's been some time since the last post, but the project is not dead. Been fixing and changing bits on it.

I've made silly mistakes on latest board revision :omg:
DSC_0025aa.JPG
  • Cap polarity markings on C11 and C9 are rotated by 90 degrees
  • Vias are not covered by solder mask, drawing some of the markings unreadable.
Besides those quirks the kit is buildable and I have six of them READY. I'm going to order corrected motherboards next week (they should land in my desk in 3 weeks), but if someone wish to have full kit *now*, write me PM / respond to conversation we've already started.

There also will be Eurorack black panels (1.6mm PCB) available as an alternative for metal panels. Don't be spoiled by the knob variant though :^)
vacu_blk_m.jpg
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B0bcat
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Re: Vacuform - Vacuum tube diode SVF

Post by B0bcat » Thu Jul 02, 2020 6:38 pm

awesome news!
WTB: Plan B / SubCon Model 15 VCO, Plan B Model 12 VCF, ADDAC 805v1, MakeNoise QMMG

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luchog
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Re: Vacuform - Vacuum tube diode SVF

Post by luchog » Fri Jul 03, 2020 11:12 am

Sweet! Looking forward to building this one.

electricanada
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Re: Vacuform - Vacuum tube diode SVF

Post by electricanada » Sat Jul 04, 2020 2:44 pm

I’m still in for a kit when it’s ready.
Eléctrica (electric) Nāda (the yoga of sound).

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paperCUT
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Re: Vacuform - Vacuum tube diode SVF

Post by paperCUT » Mon Jul 06, 2020 2:16 pm

Same here I'm still in for a kit!

ronnieb
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Re: Vacuform - Vacuum tube diode SVF

Post by ronnieb » Mon Jul 06, 2020 3:33 pm

Excuse the probably silly question but is there anything about tubes that could make it more difficult than your average DIY build?
Looking over the PCB, it seems manageable(?) but I've only built a couple of kits and my knowledge of electronics is limited at a push, so I'm also aware I don't know what I'm doing at the best of times
:cat:

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luchog
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Re: Vacuform - Vacuum tube diode SVF

Post by luchog » Mon Jul 06, 2020 4:46 pm

ronnieb wrote:
Mon Jul 06, 2020 3:33 pm
Excuse the probably silly question but is there anything about tubes that could make it more difficult than your average DIY build?
Looking over the PCB, it seems manageable(?) but I've only built a couple of kits and my knowledge of electronics is limited at a push, so I'm also aware I don't know what I'm doing at the best of times
The big problem with tubes vs. solid state electronics is the higher voltages needed to drive the tube circuits, and powering the tube heater to the appropriate temperature to drive the thermionic emission. There are a lot of niggling technical details as well, but that's the biggest problem for kit builders (as opposed to circuit design). There's also the issue of tube variability and lifespan (tubes eventually burn out like incandescent lightbulbs), but IIRC Bard said he would be pre-testing and matching the tubes provided in the kits.

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EATyourGUITAR
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Re: Vacuform - Vacuum tube diode SVF

Post by EATyourGUITAR » Mon Jul 06, 2020 10:41 pm

the designer sets the current through the heaters. this determines performance vs lifespan of the tubes. if you decrease the heater current, you decrease performance but you increase tube life. any builder can modify the heater current for longer life but the gain is reduced so that may turn an oscillating filter into a non-oscillating one. some people never replace the tubes even when they are bad. some people don't notice a difference. it depends on the person, context, gear. I would always replace a tube when it becomes microphonic or continuous unwanted oscillations. if it will not pass audio sure but that doesn't happen unless it was shipped or dropped with tubes installed.
WWW.EATYOURGUITAR.COM <---- MY DIY STUFF

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BARD
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Re: Vacuform - Vacuum tube diode SVF

Post by BARD » Tue Jul 07, 2020 7:32 am

ronnieb wrote:
Mon Jul 06, 2020 3:33 pm
Excuse the probably silly question but is there anything about tubes that could make it more difficult than your average DIY build?
Looking over the PCB, it seems manageable(?) but I've only built a couple of kits and my knowledge of electronics is limited at a push, so I'm also aware I don't know what I'm doing at the best of times
:cat:
If it comes to the build, there's not much difference between other THT builds. As you can follow the BOM and populate the boards with the help of reference designators (e.g. R3, R4, C1), you'll build it.
One tricky part will be the callibration. Since the ranges of trimmers are pretty wide there would be a lot of helpless random wiggling without proper instruction, so I have tried to cover this process step-by-step in manual.

If it comes of the power supply / tube incoherence issues, this is as stated with previous replies. You'll want to have beefy 5V supply in your case or as external power adapter (850mA for one Vacuform).

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sirjpink
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Re: Vacuform - Vacuum tube diode SVF

Post by sirjpink » Tue Jul 07, 2020 7:59 am

Not sure if I am too late to the party, but this looks like a very tasty filter! If possible, I am very much interested in a full euro kit. PM-ed too. :party:

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BARD
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Re: Vacuform - Vacuum tube diode SVF

Post by BARD » Tue Jul 07, 2020 8:38 am

Aight. From this point we're waiting for new PCBs and parts to arrive :roll:

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