12 pcs PT2399 Echo delay IC incl. 12 pcs 16-pin IC sockets
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Selected User Reviews For 12 pcs PT2399 Echo delay IC incl. 12 pcs 16-pin IC sockets
This IC is one of my favorites for creating music effects, and it's very simple to use. Specifically, this item: br>br>
- Good value (I paid $13, but it's still a good value at $18)br>- The tube packaging is quite convenient, and I'm glad it includes IC socketsbr>- The pins on the ICs were in good shape when they arrived, with no major issues. br>br>The PT2399 in generalbr>- Simple to usebr>- Although the datasheet isn't perfect, the example circuits work perfectly well as is. br>- If you want to chain multiple devices in series for a longer delay, keep in mind that the device has about a x2 gain. br>- The delay rate (i. e. the internal clock speed) is actually current controlled (the datasheet provides delay control in resistance), but if you want the delay modulated by an LFO (rather than a potentiometer), you can use a current sync circuit. For the delay/clock control, a 3V source and a 690 ohm resistor is the Thevenin equivalent model (Google it). This will assist you in converting the resistance-to-conversion. from the datasheet to the current-state-of-the-art-of-the-art-of-the table of delaysbr>- The 2. should be avoided. Internal reference voltage varies a lot between ICs (the lowest was 2. 25V from the same lot). 2V, with 3V being the highest). Although this has little impact on performance, DO NOT connect the reference voltage pins of multiple PT2399 together. br>br>With the PT2399, you have a lot of options. br>br>Suggested circuits (all based on the datasheet's delay circuit): br>1) The echo/delay effect (shown in the first photo). PT2399 is used in a series. Controlling the delay time with a potentiometer and controllable feedback (zero feedback results in a single delay, non-controllable feedback results in multiple delays). There are multiple echos when there is no feedback. br>2) The effect of a chorus (second photo). Using one PT2399, a current sync for controlling the PT2399's delay, and an LFO for controlling the current sync. A slight pitch change on the delayed signal is achieved by modulating the amount of delay (between 40ms and 160ms). When combined with the original signal, it creates the impression of two voices (or instruments) singing in unison. 3) Reverb (apologies for the lack of a photo). Parallel use of two PT2399s with slightly different delays and feedback. Each PT2399's input should be the input signal, while the output of the other PT2399 should be the output signal. and the overall output be a gain-balanced mix of the PT2399's input and both outputs. (Three PT2399 in parallel is recommended, but two will suffice. ).
If you've ever built a guitar pedal, you're well aware that pt2399 chips can be hit or miss. Some of them are excellent, while others are a complete waste of time. It's a good idea to buy a few just in case one of them is a dud. Having said that, this was an excellent batch. There were only two of them that were truly awful. One was dead on arrival, while the other was extremely noisy.
I ordered these from Amazon because I wanted components that were made in the United States. These are from China, which I have ordered. These, to my dismay, are from China. They are markedly superior to those shipped directly from China, and they arrived much quicker: Six weeks vs. two days I haven't tried any devices with them yet, but they appear to be good components.
I've got one working in a Mad Professor clone with a lot of delay. It was simple to diagnose using the datasheet and meter, which I had to do several times due to a'maker error' at the time. I've put three of them in a socket and they're all working fine, but this type of IC has a lot of variability, so try a few to get the best latency or whatever you're after.
So far, I've used two or three in builds and have yet to encounter a bad one. They function as delay pedals should.
Yay! All 12 of them worked, but one of them didn't start self oscillation without a signal. A few were stuck together, and one had a bent leg due to being packed in the tube. I've only used them in a delay pedal circuit so far, but I plan to use a few in chorus pedals as well.
The chips worked perfectly, but the sockets were a bit flimsy.
Thanks.
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