
very similar to the rebote,as BW said onceIntripped wrote:i see in the forum there is a topic about the Faux Analog tape delay... this was missing
alexradium wrote:very similar to the rebote,as BW said once
alexradium wrote:very similar to the rebote,as BW said onceIntripped wrote:i see in the forum there is a topic about the Faux Analog tape delay... this was missing
Intripped wrote:the only thing that i don't like is that you have some hiss that you can clearly hear under the repetitions.
anyway if you set the TONE quite dark, this hiss becomes very subtle.
the cap marked as CXXX is not present on the board.
indyguitarist wrote:alexradium wrote:very similar to the rebote,as BW said once
to be accurate though, the rebote is basically just the datasheet schematic material.
skywise wrote:indyguitarist wrote:alexradium wrote:very similar to the rebote,as BW said once
to be accurate though, the rebote is basically just the datasheet schematic material.
Yep. The Rebote 2 is the datasheet "application circuit" with an added op amp for input amp and output mixing.
Just about all the PT2399 circuits are going to look a lot like the datasheet. There is a basic footprint needed for it to work. What matters is what you do with the input and delay line filtering, how feedback is controlled, fun stuff like modulation, etc. Also, pre-selecting the delay chips is a big help in reducing noise. Some are much quieter than others.
skywise wrote:indyguitarist wrote:alexradium wrote:very similar to the rebote,as BW said once
to be accurate though, the rebote is basically just the datasheet schematic material.
Yep. The Rebote 2 is the datasheet "application circuit" with an added op amp for input amp and output mixing.
Just about all the PT2399 circuits are going to look a lot like the datasheet. There is a basic footprint needed for it to work. What matters is what you do with the input and delay line filtering, how feedback is controlled, fun stuff like modulation, etc. Also, pre-selecting the delay chips is a big help in reducing noise. Some are much quieter than others.
MoonWatcher wrote:What a waste of components - the noisy ones must be discarded altogether.
Pin-6 of the PT2399 is a voltage source that rests at half the chip's supply voltage, which is provided by a 5V regulator in this case, so pin-6 will be at 2.5V. The current sucked out of this pin controls the delay time. An important thing to consider is that the current must not exceed 2.5mA when power is first applied or the chip is liable to burn out, so a 1k fixed resistor is included in series with the delay pot.
There have been reports that some PT2399 chips do not function properly if the digital ground is not connected directly to analog ground -this seems to depend on when the chips were manufactured. I therefore recommend that you short pin-3 directly to pin-4 of the PT2399, i.e., both pins will be grounded.
marshmellow wrote:See here: http://valvewizard.co.uk/smalltime.htmlPin-6 of the PT2399 is a voltage source that rests at half the chip's supply voltage, which is provided by a 5V regulator in this case, so pin-6 will be at 2.5V. The current sucked out of this pin controls the delay time. An important thing to consider is that the current must not exceed 2.5mA when power is first applied or the chip is liable to burn out, so a 1k fixed resistor is included in series with the delay pot.
Also:There have been reports that some PT2399 chips do not function properly if the digital ground is not connected directly to analog ground -this seems to depend on when the chips were manufactured. I therefore recommend that you short pin-3 directly to pin-4 of the PT2399, i.e., both pins will be grounded.
black03 wrote:Hello, can someone tell me why the PT2399 is ruined often? I measured my power supply and delivery 9v
ppluis0 wrote:black03 wrote:Hello, can someone tell me why the PT2399 is ruined often? I measured my power supply and delivery 9v
Hello Black03
But you MUST supply the PT2399 with no more than 5Vdc as can be seen in the previous schematic...!!!
What voltage you have at pin 1 on the delay chip respect to ground ??
Mbas974 wrote:I'd like to add TAP tempo to this schematic, which DIY one should I use ?
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