I just remembered, I snapped these pics a while back. Once I have some time and it's light outside, I'll snap some better pics if there is any interest. Doesn't look like an easy trace.
It has a Pt2399 and a Ne570 D compandor as well as a TL061CP and two JRC5534 DD. Two 78L05 are also in there. The thing is very well build, two pcbs that are connected via a cable strip. One holds the pt2399, compandor and the pots and the other holds some opamps, the jacks and switch. I wonder what the second 5v voltage regulator is for. the pt2399 only needs one, the opamps dont and the ne570 needs at least 6v.
Completed builds: rebote 2.5; supreaux; odie; heartthrob tremolo; ross phaser; dr. boogey; thor; baja black toast; slow gear attack, rebote, tri-vibe, small clone, little angel, magnus modulus, echo base, hex fuzz, big muff, 22/7.
Now,
Companding is usually used to inprove signal to noise ratio in delay lines where the sampling gets real shitty. Read: Analog delays, When the sampling rate is higher the signal to noise ratio stays better and companding... is for wankers.
Except there is a case where sampling is not even an issue and the delay times are really short. That's the Ibanez PH99.... which uses a compander... uberwanking..
Now,
Companding is usually used to inprove signal to noise ratio in delay lines where the sampling gets real shitty. Read: Analog delays, When the sampling rate is higher the signal to noise ratio stays better and companding... is for wankers.
Except there is a case where sampling is not even an issue and the delay times are really short. That's the Ibanez PH99.... which uses a compander... uberwanking..
Would that be a Wanking Panda ?
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !
No silicon heaven ? preposterous ! Where would all the calculators go ?
modman wrote: ↑Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...
Hello,
I received from my friend couple of pics with guts of that beast. It looks like pretty immense design - PT2399 with NE570 compander and 3 opamps (TL061 and 2x 5534). Hope pics will be helpful. I'm attaching them in zip archive.
Completed builds: rebote 2.5; supreaux; odie; heartthrob tremolo; ross phaser; dr. boogey; thor; baja black toast; slow gear attack, rebote, tri-vibe, small clone, little angel, magnus modulus, echo base, hex fuzz, big muff, 22/7.
Knowing Bjorn, the 5534s are the input and output/mixer stages since they're rail to rail and there's only a single supply line. The TL061 is the oscillator, and the delay line is companded. Wouldn't be terribly surprised if the basic method of chorus is similar to that of the Little Angel, but the rest of the circuit is likely fairly different.
Now,
Companding is usually used to inprove signal to noise ratio in delay lines where the sampling gets real shitty. Read: Analog delays, When the sampling rate is higher the signal to noise ratio stays better and companding... is for wankers.
Except there is a case where sampling is not even an issue and the delay times are really short. That's the Ibanez PH99.... which uses a compander... uberwanking..
That may be the case, but the PT2399 tends to go into clipping very easily. If you compress / limit on the way in and expand on the way out, you can get all the effect without the risk of getting that nasty distortion.
"Why is it humming?" "Because it doesn't know the words!"
I would really like to see this one retraced.
Not to build a clone, but maybe to learn s.th. to make an improved version of the "Dimension-P" chorus, which is based on the PT2399 as well...
Oh yes I wanted to use a compander to lower noise of the design I made and you might get a laugh ot of it that I called my local submarine enginer and discussed
superhetorodyne modulators and I banged my head against the garagewalls until it dawned on me from radio school that yes you can current modulate...
The one thing that bugs me isthat 35 years of learning memories still take hours to come.
roseblood11 wrote:I would really like to see this one retraced.
Not to build a clone, but maybe to learn s.th. to make an improved version of the "Dimension-P" chorus, which is based on the PT2399 as well...
Hi there,
Right what would you like to learn?
At your service
BJ
designer of Electric blue chorus
BJF electronics
Sweden
MP EBC.zip
