EHX - (Super) Space Drum (Percussion Effect)

Ruprecht · Post by **Ruprecht** » 04 Dec 2012, 16:14

My Super Space Drum clone with in-built delay

JuliaDee · Post by **JuliaDee** » 04 Dec 2012, 18:12

Nicely done! Warms my heart

Ruprecht · Post by **Ruprecht** » 04 Dec 2012, 20:39

Thanks

I´m fan of analog drum synths

My Synare 3 and Coron DS-8 clones

And Synare 3 "UFO" clone

Built by me from scratch

JuliaDee · Post by **JuliaDee** » 04 Dec 2012, 23:33

Those panels are just amazing. How are they fabricated? Do you do it yourself or have them made?

julia

SpencerPedals · Post by **SpencerPedals** » 05 Dec 2012, 00:19

That's killer. I've had no time to build lately, but when I get a chance this is on my to-do list. Looks and sounds amazing—congrats!

Ruprecht · Post by **Ruprecht** » 05 Dec 2012, 06:39

I made myself small CNC milling cutter some years ago so all this is my work

Sheet of tin is engraved first and then bended. Wood side panels are simply milled.

JuliaDee · Post by **JuliaDee** » 05 Dec 2012, 13:16

Ruprecht wrote:I made myself small CNC milling cutter some years ago so all this is my work
Sheet of tin is engraved first and then bended. Wood side panels are simply milled.

Beautiful. Nicest DIY work I've ever seen. Kudos to you!

julia

P.S. There's a Clockworks just came up on ebay - $1,100

Ruprecht · Post by **Ruprecht** » 05 Mar 2013, 20:38

apollomusicservice · Post by **apollomusicservice** » 06 Mar 2013, 10:17

Very nice.

satanicmajesties · Post by **satanicmajesties** » 12 May 2018, 09:39

Hello,
I'm interested in making one for fun!
Where can I find Xtal mic or can I put another thing in order to replace the xtal?
Thanks

uncleboko · Post by **uncleboko** » 12 May 2018, 09:55

satanicmajesties wrote:Hello,
I'm interested in making one for fun!
Where can I find Xtal mic or can I put another thing in order to replace the xtal?
Thanks

https://www.ebay.co.uk/p/20-Pcs-Electre ... 7675.l2644

These should do the trick, you may need to play with the peak follower gain.

satanicmajesties · Post by **satanicmajesties** » 12 May 2018, 11:12

Thanks for your reply.
What is peak follower gain?
Is there a component to add, change or change value?

JuliaDee · Post by **JuliaDee** » 12 May 2018, 15:08

Crystal mic basically = piezo disk. Back in 1978 we did not have piezo disks

I would not recommend an electret mic - they are fragile and they need a power supply. Depending on how the piezo is mounted and how hard you hit it, you might want some kind of high-voltage protection to protect the rest of the circuit (Yamaha actually puts spark gaps on their PCBs for this!). But if you just stick it to a hard flat surface as in the original Space Drums, it probably won't be necessary. Voltage generated is proportional to how much the disk flexes.

uncleboko · Post by **uncleboko** » 12 May 2018, 23:12

Ah yes of course I forgot about the power requirement!

satanicmajesties · Post by **satanicmajesties** » 13 May 2018, 11:23

The missing value of resistor R16 is 330, according to original schematic.
Thanks to Julia

uncleboko · Post by **uncleboko** » 13 May 2018, 11:40

uncleboko wrote:Ah yes of course I forgot about the power requirement!

I'm used to plugging a pair of electret capsules into my digital recorder, which has plug in power, when recording a gig.

EHX - (Super) Space Drum (Percussion Effect) [schematic]