moog 901a/b clone available from SYNTH-WERK.COM

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whitenoise
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moog 901a/b clone available from SYNTH-WERK.COM

Post by whitenoise » Mon May 20, 2013 5:45 pm

SW 901a/b available at SYNTH-WERK.COM

atkbg
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by atkbg » Tue May 21, 2013 12:54 pm

You do realize the irony of your chosen username and your first and only post being an advertizement, don't you?

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thealien666
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by thealien666 » Tue May 21, 2013 4:57 pm

I don't know why, but I have the feeling that we might not see him here again... :roll:
Even when it's about synth stuff, I hate spam. Especially when it's the first and only message from someone on a forum... :x
Moog Minimoog D (1975)
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MC
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by MC » Tue May 21, 2013 5:21 pm

. .
Last edited by MC on Thu May 30, 2013 9:29 am, edited 1 time in total.
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whitenoise
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by whitenoise » Tue May 21, 2013 6:53 pm

I do not exactly understand what the problem is????
What is wrong with announcing the availability of a legendary moog module as a clone in a moog forum.....

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fyvewytches
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by fyvewytches » Wed May 22, 2013 4:10 am

I really don't see why this is spam. It's on topic and certainly not unwanted ! There are plenty of self-promoting posts here, nothing wrong with that as long as it's on topic IMO.

It seems to me that if you have any interest in MU modular gear whatsoever, you should take a look at what these guys make !!
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thealien666
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by thealien666 » Wed May 22, 2013 3:31 pm

whitenoise wrote:I do not exactly understand what the problem is????
It's not exactly a "problem" per say. It's just that it looks peculiar to arrive on a forum without any presentation about yourself (at least a couple of words) and right away advertise a link for a commercial product, even though it is synth related...

Anyway, welcome to the forum anyhow. :D
Sorry to have seemed a bit harsh before, and let's hope you have something more to contribute than just advertisement ? :wink:
Moog Minimoog D (1975)
DSI OB6
DSI Prophet REV2
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Ensoniq SQ-80
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Kevin Lightner
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by Kevin Lightner » Wed May 22, 2013 6:09 pm

My only (opening) comment is that, after working on over 100 901Bs, I know that triangle waveform glitch shouldn't be as pronounced.
Usually it happens because of aged resistors or miss-set trims.
Since this builder is only using precision components, it suggests he believes it was a feature to be copied and not an undesired quirk to be eliminated.
Better to be king for a night than schmuck for a lifetime. - R. Pupkin

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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by ARP » Fri May 24, 2013 12:08 am

I'd like to hear some sound clips. The Moog 901b is an awesome sounding oscillator, maybe the best
I've ever heard, not withstanding the tuning issues associated them. I recently saw a Don Martin Moog 901b go for over $600 on ebay :shock: It will be interesting to hear how these Moog clones sound 8)
Thanks for posting !
"Although they heard the music..they didn't understand the tune"

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whitenoise
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by whitenoise » Wed May 29, 2013 2:08 pm

Hi Kevin,

the design of the 901b was not changed at all. We did a new board design and used as you mentioned high quality components. We compared the waveform to several 901b of different years and the waveform was more or less exactly the same. Also from a sonic point of view it was the same. So it is very interesting what you saying because you habe a lot of expierience with this oscillator. One musician explained the difference between the 901b and the 921b like the differnce between red wine in a plastic bottle and red wine in a in a oak-timber barrel.....thank you for your input

regards
Gerhard

p.s. we will come up with sound samples of different artists soon, this is in progress.....

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Kevin Lightner
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by Kevin Lightner » Wed May 29, 2013 10:31 pm

Thank you for your thoughts, Gerhard.

I think perhaps some 901Bs used selected resistors or could have even been originally prototyped and built with resistors that weren't quite accurate.
Same could go for matching of transistors.
I really don't know.
All I can say is that the glitch isn't always there or as large as what I see in your photos.
The phase of where it occurs can vary sometimes too, but I think ideally it's supposed to be a very narrow glitch exactly at the top.
I've seen many 901Bs that had triangles as perfect as this described above, so I assume this was Moog's goal.
Given the simple design, it's the best one could hope for too.

I certainly do understand that having a pure sine wave is desirable and as you've probably discovered, trimming the triangle to be more perfect might make for a less perfect sine, but I do think the original design consideration was for a better triangle in the first place.
The better the triangle, the better the sine anyway.

I also agree that one might not hear such a glitch at audible rates, but if used as an LFO or clock, it might be a problem.

Finally, I do admire the work you put into these units.
I can understand how hard it is to match capacitors for range switches and many of the other processes you must have done.
So I commend you on your work. :)
Oh and just in case you're interested, I have many original (NOS) Moog panel screws of the type you instead used hex (allen wrench) types for. :)

As for 901s vs 921s, that's like comparing dogs and deer.
The closer one looks, the more differences you can see. :)
I don't even compare the two.
Better to be king for a night than schmuck for a lifetime. - R. Pupkin

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JohnLRice
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by JohnLRice » Thu May 30, 2013 3:19 am

FWIW, SYNTH-WERK.COM has been posting over on Muff's forum for a while now and also works with Moon Modular etc. He seems like a good guy making good products (and takes good pictures too, well worth a visit to his website!)
John L Rice
MiniMoog, MinitMoog, MG-1, Sub Phatty, 5U modulars, Eurorack modulars

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whitenoise
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by whitenoise » Thu May 30, 2013 3:01 pm

Thank you for your feedback, Kevin.

As you can imagine it was a very rough ride to come this far with the 901b. We startet this project about 2 years ago with all kind of up´s and down´s. But the sound of the 901b always kept the spirit high. We have reached a Frequency stability of 0,2 Hz over a period of 3 month (could be even longer....) and good tracking accuracy over 3,5 Octaves. We have been scanning the planet for "good" 2N2646 and CA3019 and finally have the quantity to offer the 901a/b. Concerning the glitch on the triangle waveform you mentioned we will check what the impact of the adjustment to the sine wave will be, but like you say from a sonic point of view, especially after the CP3 and 904a, there is no impact.

Your words mean a lot to us! Thank you very much.

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whitenoise
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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by whitenoise » Thu May 30, 2013 3:02 pm

JohnLRice wrote:FWIW, SYNTH-WERK.COM has been posting over on Muff's forum for a while now and also works with Moon Modular etc. He seems like a good guy making good products (and takes good pictures too, well worth a visit to his website!)
Thank you for your recommendation John!

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Re: moog 901a/b clone available from SYNTH-WERK.COM

Post by Goom » Fri May 31, 2013 10:51 pm

What is the price for a single 901B shipped to the US? Thank you.

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