208r PULSER leaking in audio channel (and ENV too)

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doepferiano
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208r PULSER leaking in audio channel (and ENV too)

Post by doepferiano » Thu May 10, 2018 1:37 pm

Hello 208ers

is there any setting to reduce the clicking from the pulser

is distinctly noticeable in the audio output directly (the main volume have no relation)

if I set to audio frequencies is like a VCO

the same happens to the ENV if I set it to autorepeat
the click is audible in the audio outputs

thanks
ty

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search64
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Post by search64 » Thu May 10, 2018 1:49 pm

Check out Papz reply here:

viewtopic.php?p=2725583&highlight=

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doepferiano
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Post by doepferiano » Fri May 11, 2018 5:58 am

thanks

it's a little bit different

for me it's an audio leak: it's a click coming out for every pulse (and ENV loop)
directly from the outputs (or headphone)

the main volume or the headphone volume are not affecting it

search64 wrote:Check out Papz reply here:

viewtopic.php?p=2725583&highlight=

tardishead
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Post by tardishead » Sat May 12, 2018 1:48 am

It could have something to do with poor power distribution

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doepferiano
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Post by doepferiano » Sun May 13, 2018 4:18 am

tardishead wrote:It could have something to do with poor power distribution
waiting for a new PSU/cincon (could be a 211 problem)

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johnnywoods
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Post by johnnywoods » Sun May 13, 2018 10:09 am

I have this same issue on a 208r v1 and am using a BEMI power supply and busboard. :despair:

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doepferiano
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Post by doepferiano » Sun May 27, 2018 3:46 am

you're right, now I have a beefy cincon PSU and the problem persists

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Post by tarandfeathers » Thu May 31, 2018 2:37 am

I think this is probably a different symptom of the same underlying problem that causes the oscillator frequencies to sag when LEDs are lit - poor power distribution inside the module.

However: what gauge wire is used from the module to the power connector that plugs into the bus board? And how long? I built mine with 45cm of 18awg cable, which is much thicker than most people use and bleed from the pulser and envelope is pretty quiet in mine (I have used it live at pretty extreme volume and the audio bleed through the LPGs dwarfs any clicking from the pulser/envelope.)
Dunnington Audio - Various Buchla format accoutrements available

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doepferiano
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Post by doepferiano » Thu May 31, 2018 4:34 am

I've desoldered the LED connection to test if the problem was related, and the click of the end cycle is still there
tarandfeathers wrote:I think this is probably a different symptom of the same underlying problem that causes the oscillator frequencies to sag when LEDs are lit - poor power distribution inside the module.
I have 18awg 40~45 cm power cable
tarandfeathers wrote:However: what gauge wire is used from the module to the power connector that plugs into the bus board? And how long? I built mine with 45cm of 18awg cable, which is much thicker than most people use and bleed from the pulser and envelope is pretty quiet in mine (I have used it live at pretty extreme volume and the audio bleed through the LPGs dwarfs any clicking from the pulser/envelope.)

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Post by papz » Tue Jun 26, 2018 5:17 pm

Maybe this could help ?
viewtopic.php?p=2858650#2858650
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