Echo Blue (Deep Blue Delay) voltages issue

[bluebunny]

So could this be the non genuine PT2399 ?

I doubt it.  If someone is in the business of selling fake PT2399s, they're gonna grab whatever 16-pin POS they can find, regardless of its function or whether it works or not, and print "PT2399" on the top.  They won't be going to all the bother of fabbing a slightly inferior version of a real PT2399.

[khm9]

So could this be the non genuine PT2399 ?

I doubt it.  If someone is in the business of selling fake PT2399s, they're gonna grab whatever 16-pin POS they can find, regardless of its function or whether it works or not, and print "PT2399" on the top.  They won't be going to all the bother of fabbing a slightly inferior version of a real PT2399.

I didn't mean like a  fake PT2399, meant more like lower quality chip.

[MrStab]

surprising as it is given it's a niche IC, a lot of experiences on DIYSB and Princeton's customer service dept are fairly confident that the PT is faked a lot. this thread is a bit more comprehensive, there are others:

http://www.diystompboxes.com/smfforum/index.php?topic=100004.0

Steve from the DoctorTweek shop even had a problem at one point, which forced him to build a dedicated tester to try out each chip.

[khm9]

surprising as it is given it's a niche IC, a lot of experiences on DIYSB and Princeton's customer service dept are fairly confident that the PT is faked a lot. this thread is a bit more comprehensive, there are others:

http://www.diystompboxes.com/smfforum/index.php?topic=100004.0

Steve from the DoctorTweek shop even had a problem at one point, which forced him to build a dedicated tester to try out each chip.

Do you happen to know why my repeats have some hiss in them?

[MrStab]

i think to an extent there will be some hiss with this kind of IC if there isn't filtering, but it shouldn't be bad enough for it to be a problem. check out this post:
http://www.diystompboxes.com/smfforum/index.php?topic=94536.msg816106#msg816106, specifically:

2. Anything beyond 12 O'clock produces a lot of shifting background noise - like tuning between radio stations.
3. The sound quality is very much reduced overall.
4. At longer delay time the noise level is serious and unusable.

[khm9]

Hi,
I recorded a short audio clip of the delay circuit regarding the small hiss in between repeats.
I replaced the PT2399 before recording, the results were the same.

So I think that this might that "low-fi" sound people were talking about, not sure.

Can anyone tell me if the pedal sounds as it should?

First few seconds are no strumming, pedal, guitar, plugged in. No noise.
Next is muted strumming, no noise as well.
Then I played some simple low tones and the hiss in between the repeats became hearable.

Link: http://picosong.com/rTxP/

Recorded by plugging the pedal directly into digital multi-track recorder, Zoom R8.

Thanks

[duck_arse]

I could barely hear the hiss amid the playback noise of my computer. you could try increasing the low-pass filtering, but I think that's the lo-fi beauty shining through.

[khm9]

I could barely hear the hiss amid the playback noise of my computer. you could try increasing the low-pass filtering, but I think that's the lo-fi beauty shining through.

Thanks for the reply
If the delay sounds like it's supposed to, I will leave it like this.