<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr">Feedback modules has made a filter with the h11f1. </div><div dir="ltr"><br></div><div dir="ltr"><a href="https://feedback-modules.myshopify.com/collections/diy-kits/products/lpfet-vcf-diy-kit1">https://feedback-modules.myshopify.com/collections/diy-kits/products/lpfet-vcf-diy-kit1</a></div><div dir="ltr"><br></div><div dir="ltr">I tried to use it in a mute circuit without luck. I don’t remember why I didn’t like it. </div><div dir="ltr">/matti</div><div dir="ltr"><br><blockquote type="cite">8 feb. 2020 kl. 19:04 skrev music.maker@gte.net:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span></span><br><span></span><br><span>This has been bugging me because I seem to remember a thread here years ago. I can't</span><br><span>remember what the outcome was, but maybe a search of the archives (for which I seem to have</span><br><span>no foo) might find it. I do remember it was regarding the datasheet circuits mentioned by</span><br><span>the OP. Generally, the feel I think was that under the right circuit circumstances, it can</span><br><span>work like a VCresistor. I remember that the vactrol was compared and is known to work</span><br><span>properly as a floating VCresistor albeit slow to change value. Not an EE here, but looking</span><br><span>at the floating resistor circuit I see two current producing electrodes posing as a</span><br><span>floating resistor. I think generally the statement about it's lack of use in synth</span><br><span>circuits is due to it not being very good is probably correct. Looking at the single ended</span><br><span>circuits, they are AC coupled...</span><br><span></span><br><span>Has anyone experience with H11F1 devices? Those should be a lot faster than vactrols,</span><br><span>probably more consistent, but I don't know if the transfer function is useful in</span><br><span>audio/synth circuits.</span><br><span></span><br><span>-- ScottG</span><br><span>_______________________________________________</span><br><span>Synth-diy mailing list</span><br><span>Synth-diy@synth-diy.org</span><br><span>http://synth-diy.org/mailman/listinfo/synth-diy</span><br></div></blockquote></body></html>