AM8060 hum

Discussion and support for the AMSynths range of analog synthesizer modules.

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Brownian Lotion
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AM8060 hum

Post by Brownian Lotion » Tue Apr 24, 2012 3:26 am

Hi all,

Anyone experience this? I have a AM8060 jp6 filter clone, and the thing picks up loads of hum from nearby modules / psu. When I have it isolated in my doepfer beauty case on a separate psu it is relatively quiet (only a little hum) but in the thick of the rest of my system it is loud and obnoxious 50hz mains BZZZZZZZZ

Would this hum be caused by the de-amplification/amplification stages before and after the IR3109 chip?

kecked
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Post by kecked » Mon Jul 02, 2012 8:07 pm

shield it! I use copper tape and my ground issues are gone.

Brownian Lotion
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Post by Brownian Lotion » Thu Jan 30, 2014 6:45 am

No dice. Now there's a new version of the 8060! I wonder if mine can be modded...

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ndkent
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Post by ndkent » Fri Feb 28, 2014 4:46 am

I'm sure it's worth contacting Rob. I've gotten great support.

The new SE version looks totally re-laid out from the back, lots more pcbs for the pots, jacks, a second smaller board perpendicular to the main one, anyway, new voltage controlled Q, far beyond a couple changes.

I suspect the original version went through some smaller changes between assembly runs. I'm guessing he did 3 runs of 10 of them. I see at least a LED was added that wasn't in the first run.

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emuarc
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Post by emuarc » Sun Mar 02, 2014 7:09 am

AMSynths shipped 30x of the original AM8060 modules in 2010/11. The SE model was launched in 2014 and is a complete redesign, we have shipped 10x including some beta testers. The redesign was to improve on the resonance control, add CV control of resonance and use Roland push illuminated buttons. There is also a power supply protection circuit which could also help reduce interference, however we have had only one report of this issue.

Contact me off list for support, I have some 8060SE's that can be beta tested to see if the problem is resolved.
Rob Keeble
Owner & Designer
AMSynths

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