<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr">I wonder if he left because he called this list 99% spam!😂😂😂</div><div dir="ltr"><br><blockquote type="cite">On Feb 9, 2020, at 12:07 PM, Jacob Watters <jacobwatters@gmail.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="auto">Dan A. Made a filter with the H11F1 in 2012 after hearing about the chip in this email list.<div dir="auto"><br></div><div dir="auto"><a href="https://youtu.be/Zpf4WLRaU0M">https://youtu.be/Zpf4WLRaU0M</a><br></div><div dir="auto"><br></div><div dir="auto">He is usually fairly responsive in his comments. You could ask there (or maybe he is still in this email list too).</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat., Feb. 8, 2020, 8:39 p.m. , <<a href="mailto:eidorian@aladan.net">eidorian@aladan.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The prodigious and awesome Gieskes uses H11F1 in the 3trins, for voltage <br>
control over a video-frequency schmidt-trigger based oscillator.<br>
<br>
<a href="https://gieskes.nl/instruments/?file=3TrinsRGB1" rel="noreferrer noreferrer" target="_blank">https://gieskes.nl/instruments/?file=3TrinsRGB1</a><br>
<br>
<a href="https://gieskes.nl/" rel="noreferrer noreferrer" target="_blank">https://gieskes.nl/</a><br>
<br>
Cheers,<br>
A.<br>
<br>
---<br>
<br>
<br>
On 09-02-2020 12:21, Didier Leplae via Synth-diy wrote:<br>
> I searched a bit in the archives, but didn’t find anything.<br>
> The H11F1 sounds interesting. I will look into that.<br>
> <br>
> <br>
>> On Feb 8, 2020, at 12:05 PM, <a href="mailto:music.maker@gte.net" target="_blank" rel="noreferrer">music.maker@gte.net</a> wrote:<br>
>> <br>
>> <br>
>> <br>
>> This has been bugging me because I seem to remember a thread here <br>
>> years ago. I can't<br>
>> remember what the outcome was, but maybe a search of the archives (for <br>
>> which I seem to have<br>
>> no foo) might find it. I do remember it was regarding the datasheet <br>
>> circuits mentioned by<br>
>> the OP. Generally, the feel I think was that under the right circuit <br>
>> circumstances, it can<br>
>> work like a VCresistor. I remember that the vactrol was compared and <br>
>> is known to work<br>
>> properly as a floating VCresistor albeit slow to change value. Not an <br>
>> EE here, but looking<br>
>> at the floating resistor circuit I see two current producing <br>
>> electrodes posing as a<br>
>> floating resistor. I think generally the statement about it's lack of <br>
>> use in synth<br>
>> circuits is due to it not being very good is probably correct. <br>
>> Looking at the single ended<br>
>> circuits, they are AC coupled...<br>
>> <br>
>> Has anyone experience with H11F1 devices? Those should be a lot <br>
>> faster than vactrols,<br>
>> probably more consistent, but I don't know if the transfer function is <br>
>> useful in<br>
>> audio/synth circuits.<br>
>> <br>
>> -- ScottG<br>
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