Search found 36 matches

IMHO, 1N4007 diodes are not a direct replacement for 1N4148, being rectifiers and much slower.

Just my two cents, tho

Don't worry. It's the fun part of DIY. Laughing

Just a thought: the LED blinking is linked to the rectangular output. If the pulse width is too narrow it can't blink. So you may try to turn clockwise the pulse width knob and see if it makes a diffe ...

Wow. Thank you so much, Yves!

METALIZER BOARD , silkscreens IN and GND are swapped, check if the silscreen differs from what's on my site.

Yves, maybe I'm dumb, but I cannot find anything on your site about the Metalizer. Th ...

Ciao Simone, io sono Marco.

As I said, the bleedthrough symptoms are obvious: at low cutoff AND high resonance the unfiltered signal can be faintly heard. This annoying behavior is the side effect ...

Yes I am italian, from Rome.
The bleedthrough thing has nothing to do with the self-oscillation of the filter.
It's an inherent issue of this circuit: at mid-high resonance levels and low frequency ...

i used unmatched BC 557 trannies from the same batch, and it seems to do the job. I will have to match the 470 pF caps as well.
does matching really make that difference ? Smile

I made two, both wit ...

Maybe my transistors have an incorrect pin orientation?

Where did you get the transistors? Once I received from Futurlec a lot of BS170s and BS250s with an inverted pinout.
Looking at the sold ...

a good way to do polarity protection?

Well, i don't know what kind of power connector you are using, but I always thought that the keyed dotcom 5 pins connector it's an excellent way to prevent po ...

Actually it's not that difficult to match transistors.

This thread, for instance, contains several useful methods :

http://electro-music.com/forum/post-276867.html

Yves' projects are wonderfully presented but sometimes is necessary to read a little "between the lines". If you look carefully, you can see that the whole LED indicator circuit (top right o ...

Of course you can. But since most of 2 pole rotary switches are actually pre-configured as 2 pole 6 positions, you may have to reduce the travel of the switch to four using the keyed ring which is on ...

Thanks.
I'll try to match them, anyways I don't know how well I can match them with a cheap multimeter...

This very forum it's your friend :
http://electro-music.com/forum/topic-34177.html

...

It's a known quirk of this circuit, something you have to live with, in a sense.
Take a look at this : http://electro-music.com/forum/viewtopic.php?highlight=lfo&t=44023

As a matter of fact, all the caps were from the same batch. I have been lucky.

Thank you again, Yves, even for your words of wisdom. Wink

I've just built this wonderful filter and, after a good calibration, it's a joy to play it (I disconnected R43 BTW). What concern me is that it sounds so good even if I used dirty cheap ceramic 470pF ...

Have a look at this post : http://electro-music.com/forum/topic-48470.html

According to Yves's spreadsheet, the VCO draws 27 mA from the positive rail and 28 mA from the negative rail.

That's an issue that's been addressed before. See http://electro-music.com/forum/topic-32340.html&highlight=lfo&start=25, notably the post by Thalassa. It's a problem that I have myself a ...

It"s possible. I've done it, although it requires etching another very small board.

Can you elaborate please?

Thank you, Yves!
Honestly, until now I've used the module only for audio, so your explanation is welcome. I've just done the mod and it works flawlessly. Perhaps it would be worth to amend your site ...

Yes the second 100K (in parallel) must be soldered under the PCB (track side).

Yves,
I wonder if that makes any difference. I've built this module without those supplemental resistors (and I belie ...

Well, I installed a socket and tried all the BC557B I had. In another topic Yves suggests that one may try even a BC557A to get longer times but I didn't have any of these. By all means one must avoid ...

Well, FWIW I post my own solution : the BC557B must be carefully selected. In the small bunch I had, the best performer gave me a cycle of 8s/80s.
And that's OK for me now.

A little update: I noticed an excess of flux on the PCB and I removed it. Now the ratio between the two ranges it's OK and both are a little too fast (5 sec at minimum at 1X and 50s at 0.1X). On the w ...

Author	Message
Topic: Yusynth Wavefolder troubleshooting
marfoski Replies: 25 Views: 23901	Posted: Thu Apr 19, 2018 7:14 am Subject: Yusynth Wavefolder troubleshooting Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 25 Views: 23901	IMHO, 1N4007 diodes are not a direct replacement for 1N4148, being rectifiers and much slower. Just my two cents, tho
Topic: need help lfo 2, no light
marfoski Replies: 6 Views: 6484	Posted: Thu Mar 23, 2017 9:16 pm Subject: need help lfo 2, no light Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 6 Views: 6484	Don't worry. It's the fun part of DIY.
Topic: need help lfo 2, no light
marfoski Replies: 6 Views: 6484	Posted: Tue Mar 21, 2017 11:37 pm Subject: need help lfo 2, no light Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 6 Views: 6484	Just a thought: the LED blinking is linked to the rectangular output. If the pulse width is too narrow it can't blink. So you may try to turn clockwise the pulse width knob and see if it makes a diffe ...
Topic: ERRATUM Soundtronics yusynth PCB
marfoski Replies: 14 Views: 21980	Posted: Tue Jan 31, 2017 11:35 am Subject: ERRATUM Soundtronics yusynth PCB Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 14 Views: 21980	Wow. Thank you so much, Yves!
Topic: ERRATUM Soundtronics yusynth PCB
marfoski Replies: 14 Views: 21980	Posted: Tue Jan 31, 2017 9:33 am Subject: Re: ERRATUM Soundtronics yusynth PCB Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 14 Views: 21980	METALIZER BOARD , silkscreens IN and GND are swapped, check if the silscreen differs from what's on my site. Yves, maybe I'm dumb, but I cannot find anything on your site about the Metalizer. Th ...
Topic: Yusynth ARP 4072 filter clone
marfoski Replies: 14 Views: 13234	Posted: Fri Dec 30, 2016 10:14 pm Subject: Yusynth ARP 4072 filter clone Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 14 Views: 13234	Ciao Simone, io sono Marco. As I said, the bleedthrough symptoms are obvious: at low cutoff AND high resonance the unfiltered signal can be faintly heard. This annoying behavior is the side effect ...
Topic: Yusynth ARP 4072 filter clone
marfoski Replies: 14 Views: 13234	Posted: Fri Dec 30, 2016 10:42 am Subject: Yusynth ARP 4072 filter clone Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 14 Views: 13234	Yes I am italian, from Rome. The bleedthrough thing has nothing to do with the self-oscillation of the filter. It's an inherent issue of this circuit: at mid-high resonance levels and low frequency ...
Topic: Yusynth ARP 4072 filter clone
marfoski Replies: 14 Views: 13234	Posted: Fri Dec 30, 2016 2:32 am Subject: Yusynth ARP 4072 filter clone Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 14 Views: 13234	i used unmatched BC 557 trannies from the same batch, and it seems to do the job. I will have to match the 470 pF caps as well. does matching really make that difference ? I made two, both wit ...
Topic: VC-LFO2 Troubleshooting
marfoski Replies: 6 Views: 5996	Posted: Mon Mar 21, 2016 9:49 am Subject: VC-LFO2 Troubleshooting Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 6 Views: 5996	Maybe my transistors have an incorrect pin orientation? Where did you get the transistors? Once I received from Futurlec a lot of BS170s and BS250s with an inverted pinout. Looking at the sold ...
Topic: A NEW (IMPROVED) VERSION OF THE YUSYNTH ADSR
marfoski Replies: 53 Views: 67575	Posted: Wed Apr 22, 2015 10:37 pm Subject: A NEW (IMPROVED) VERSION OF THE YUSYNTH ADSR Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 53 Views: 67575	a good way to do polarity protection? Well, i don't know what kind of power connector you are using, but I always thought that the keyed dotcom 5 pins connector it's an excellent way to prevent po ...
Topic: Vco
marfoski Replies: 14 Views: 13942	Posted: Tue Apr 21, 2015 4:42 am Subject: Vco Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 14 Views: 13942	Actually it's not that difficult to match transistors. This thread, for instance, contains several useful methods : http://electro-music.com/forum/post-276867.html
Topic: Vca Versions Yusynth BOM
marfoski Replies: 2 Views: 3504	Posted: Mon Mar 10, 2014 7:07 am Subject: Vca Versions Yusynth BOM Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 2 Views: 3504	Yves' projects are wonderfully presented but sometimes is necessary to read a little "between the lines". If you look carefully, you can see that the whole LED indicator circuit (top right o ...
Topic: Steiner Parker filter v.2 rotary switch
marfoski Replies: 4 Views: 4813	Posted: Mon Feb 24, 2014 10:46 pm Subject: Steiner Parker filter v.2 rotary switch Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 4 Views: 4813	Of course you can. But since most of 2 pole rotary switches are actually pre-configured as 2 pole 6 positions, you may have to reduce the travel of the switch to four using the keyed ring which is on ...
Topic: 2sc1583 on minimoog vcf?
marfoski Replies: 6 Views: 6742	Posted: Tue Feb 11, 2014 10:53 pm Subject: 2sc1583 on minimoog vcf? Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 6 Views: 6742	Thanks. I'll try to match them, anyways I don't know how well I can match them with a cheap multimeter... This very forum it's your friend : http://electro-music.com/forum/topic-34177.html ...
Topic: Yusynth VCLFO2 problem
marfoski Replies: 6 Views: 10874	Posted: Fri Jan 24, 2014 11:16 pm Subject: Yusynth VCLFO2 problem Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 6 Views: 10874	It's a known quirk of this circuit, something you have to live with, in a sense. Take a look at this : http://electro-music.com/forum/viewtopic.php?highlight=lfo&t=44023
Topic: ARP 4072 Filter Capacitors
marfoski Replies: 2 Views: 3691	Posted: Fri Jan 17, 2014 7:17 am Subject: ARP 4072 Filter Capacitors Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 2 Views: 3691	As a matter of fact, all the caps were from the same batch. I have been lucky. Thank you again, Yves, even for your words of wisdom.
Topic: ARP 4072 Filter Capacitors
marfoski Replies: 2 Views: 3691	Posted: Tue Jan 14, 2014 5:15 am Subject: ARP 4072 Filter Capacitors Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 2 Views: 3691	I've just built this wonderful filter and, after a good calibration, it's a joy to play it (I disconnected R43 BTW). What concern me is that it sounds so good even if I used dirty cheap ceramic 470pF ...
Topic: YUSYNTH VCO strange startup behavior
marfoski Replies: 32 Views: 25558	Posted: Sun Nov 24, 2013 10:39 pm Subject: YUSYNTH VCO strange startup behavior Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 32 Views: 25558	Have a look at this post : http://electro-music.com/forum/topic-48470.html According to Yves's spreadsheet, the VCO draws 27 mA from the positive rail and 28 mA from the negative rail.
Topic: VC LFO2 will not sync/retrigger
marfoski Replies: 13 Views: 10361	Posted: Thu Dec 27, 2012 11:56 pm Subject: VC LFO2 will not sync/retrigger Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 13 Views: 10361	That's an issue that's been addressed before. See http://electro-music.com/forum/topic-32340.html&highlight=lfo&start=25, notably the post by Thalassa. It's a problem that I have myself a ...
Topic: ADSR Loop/retrigger modification?
marfoski Replies: 4 Views: 6300	Posted: Thu Nov 01, 2012 9:56 am Subject: ADSR Loop/retrigger modification? Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 4 Views: 6300	It"s possible. I've done it, although it requires etching another very small board. Can you elaborate please?
Topic: Min/Max inconsistencies
marfoski Replies: 11 Views: 7949	Posted: Thu Oct 04, 2012 10:06 am Subject: Min/Max inconsistencies Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 11 Views: 7949	Thank you, Yves! Honestly, until now I've used the module only for audio, so your explanation is welcome. I've just done the mod and it works flawlessly. Perhaps it would be worth to amend your site ...
Topic: Min/Max inconsistencies
marfoski Replies: 11 Views: 7949	Posted: Thu Oct 04, 2012 5:52 am Subject: Min/Max inconsistencies Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 11 Views: 7949	Yes the second 100K (in parallel) must be soldered under the PCB (track side). Yves, I wonder if that makes any difference. I've built this module without those supplemental resistors (and I belie ...
Topic: A couple of questions about the LFOs
marfoski Replies: 4 Views: 3693	Posted: Wed Jul 11, 2012 12:39 am Subject: A couple of questions about the LFOs Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 4 Views: 3693	Well, I installed a socket and tried all the BC557B I had. In another topic Yves suggests that one may try even a BC557A to get longer times but I didn't have any of these. By all means one must avoid ...
Topic: A couple of questions about the LFOs
marfoski Replies: 4 Views: 3693	Posted: Tue Jul 10, 2012 11:37 pm Subject: A couple of questions about the LFOs Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 4 Views: 3693	Well, FWIW I post my own solution : the BC557B must be carefully selected. In the small bunch I had, the best performer gave me a cycle of 8s/80s. And that's OK for me now.
Topic: A couple of questions about the LFOs
marfoski Replies: 4 Views: 3693	Posted: Tue Jul 10, 2012 9:33 am Subject: A couple of questions about the LFOs Forum: DIY Hardware and Software » YuSynth
marfoski Replies: 4 Views: 3693	A little update: I noticed an excess of flux on the PCB and I removed it. Now the ratio between the two ranges it's OK and both are a little too fast (5 sec at minimum at 1X and 50s at 0.1X). On the w ...