*best* LDR for Mutron III / Neutron circuit
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Hey, man. This is my first post to this forum. Howdy....
Can I get any input on what *the best* LDR is for the Mutron III / Neuton circuit? DIY is fine.
I used H11F3 opto-FET isolator for ease of implementation but, even after several hours of fiddling with the current scaling resistor, it only sounds so-so. I think the slope of their response curve of is too steep for this circuit.
Thanks,
Bubba
Can I get any input on what *the best* LDR is for the Mutron III / Neuton circuit? DIY is fine.
I used H11F3 opto-FET isolator for ease of implementation but, even after several hours of fiddling with the current scaling resistor, it only sounds so-so. I think the slope of their response curve of is too steep for this circuit.
Thanks,
Bubba
- mictester
- Old Solderhand
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Where did you get your H11F3s? I need some myself. The LDRs I used in my Mutron-alike were cheap 1M ones form Futurlec.oldfatbubba wrote:Hey, man. This is my first post to this forum. Howdy....
Can I get any input on what *the best* LDR is for the Mutron III / Neuton circuit? DIY is fine.
I used H11F3 opto-FET isolator for ease of implementation but, even after several hours of fiddling with the current scaling resistor, it only sounds so-so. I think the slope of their response curve of is too steep for this circuit.
Thanks,
Bubba
"Why is it humming?" "Because it doesn't know the words!"
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Hi, mictester. They're in-stock at Small Bear Electronics...mictester wrote: Where did you get your H11F3s? I need some myself. The LDRs I used in my Mutron-alike were cheap 1M ones form Futurlec.
http://www.smallbearelec.com/Detail.bok?no=702
- mictester
- Old Solderhand
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They must be the solid gold ones at that price! I used to pay $4.25 / 100 of them! I hate profiteering!oldfatbubba wrote:Hi, mictester. They're in-stock at Small Bear Electronics...mictester wrote: Where did you get your H11F3s? I need some myself. The LDRs I used in my Mutron-alike were cheap 1M ones form Futurlec.
http://www.smallbearelec.com/Detail.bok?no=702
The price of all the components to make (for example) a TS9 was around $2.55 including the box and the assembly costs! When you factor in testing, packing, shipping, manufacturer profit, wholesaler profit, and profit for the dealer, the old price of £29.95 was sane (but there were some big profits in that figure!).
"Why is it humming?" "Because it doesn't know the words!"
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So, how is the sound of your Mutron-like pedal? Can you provide any details on the specific LDR?mictester wrote: The LDRs I used in my Mutron-alike were cheap 1M ones form Futurlec.
- Mich P
- Breadboard Brother
I've tried LED/LDR, H11F3,NSL32
And the best were the combo HAMAMATSU p873-13
With higher Rx resistor than 4,7KOhm.
Small Bear have them bit it seems
they're out of stock !
Mich P.
And the best were the combo HAMAMATSU p873-13
With higher Rx resistor than 4,7KOhm.
Small Bear have them bit it seems
they're out of stock !
Mich P.
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Agreed that the original part is best but they're as rare as hen's teeth. How about anything else? Do theMich P wrote:I've tried LED/LDR, H11F3,NSL32
And the best were the combo HAMAMATSU p873-13
With higher Rx resistor than 4,7KOhm.
Small Bear have them bit it seems
they're out of stock !
Mich P.
CLM6000's work reasonably well?
- theehman
- Diode Debunker
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oldfatbubba wrote:Agreed that the original part is best but they're as rare as hen's teeth. How about anything else? Do theMich P wrote:I've tried LED/LDR, H11F3,NSL32
And the best were the combo HAMAMATSU p873-13
With higher Rx resistor than 4,7KOhm.
Small Bear have them bit it seems
they're out of stock !
Mich P.
CLM6000's work reasonably well?
You might try to get the unit used in the EHX Qtron (old style big box version).
Ron Neely II
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
Electro-Harmonix info: http://electroharmonix.vintageusaguitars.com
Home of RonSound effects: http://www.ronsound.com
fx schematics and repairs
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They used Vactrol VL5C3. Any other opinions?theehman wrote:You might try to get the unit used in the EHX Qtron (old style big box version).
- chicago_mike
- Tube Twister
Thats what I use.
Otherwise you spend too much money for the 0803 part off ebay.
Otherwise you spend too much money for the 0803 part off ebay.
Skyline FX 2013
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Thanks, Mike... Does your pedal work well in every mode?chicago_mike wrote:Thats what I use.
- chicago_mike
- Tube Twister
Yeah. I also used the 5C3's in my mcmeat.
Skyline FX 2013
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okay, thanks. FWiW, I found someone selling the original 0805A for $20. Ugh.
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- Posts: 1
- Joined: 09 Oct 2008, 10:47
Hey there oldfatbubba,
Been looking for that part on and off for years, where did you find it?
Any comments on whether the pedal will behave the same without that part? i.e. with the vactrol approach?
Peace
Jim
Been looking for that part on and off for years, where did you find it?
Any comments on whether the pedal will behave the same without that part? i.e. with the vactrol approach?
Peace
Jim
Is there anyone with answes on this post? I have the same questions.jim50hertz wrote:Hey there oldfatbubba,
Been looking for that part on and off for years, where did you find it?
Any comments on whether the pedal will behave the same without that part? i.e. with the vactrol approach?
Peace
Jim
I have used the Hammatsu 873 from smallbear and VL5C3. Both provide good results. The vl5c3 seem to 'need matched'. I wish I knew a more efficient method of matching them. I have had to just place sip sockets and trial and use trial and error. Its tedious but it works.(anyone have a better way?) I've also replaced the 'Rx' with a pot and relocated it to the top of the build so I can adjust that on the fly. The Hammatsu has been the best so far. I built one for me and 2 for Christmas presents this year. I kept the one with the 873.
I hope it helps.
I hope it helps.
old post revisited:
I looked inside a few envelope filter pedals, one had two opto parts marked "NSL 7053" part, and the other had two parts marked "NSL 1053"
I tried looking these up, couldn't find much.
Anyone know which opto device they are?
I looked inside a few envelope filter pedals, one had two opto parts marked "NSL 7053" part, and the other had two parts marked "NSL 1053"
I tried looking these up, couldn't find much.
Anyone know which opto device they are?
- chicago_mike
- Tube Twister
Theres mods posted on a site...I forget the name of the site right now...so you can use the NSL32.
I used the VTL-5C3 and like those. I have 40 or more of those NSL-32's but haven't tried them.
I used the VTL-5C3 and like those. I have 40 or more of those NSL-32's but haven't tried them.
Skyline FX 2013