Hi Jeff,
To answer the question about smps, the test was on a different amplifier, not the SimpelStark. I’m not changing the SimpelStark as it is a fully completed amplifier. Will most likely do this on the new version. I could send you the SMPS if you want to test them. Just need to check the voltage of them.
Thanks
Do
Do you have a spare power supply to test with? Is there any info available on them? I'm curious about dimensions, ect.
The AX3 uses a separate regulated low noise supply for the input board. It will likely remain conventional.
then just have a look at the datasheet that its clearly mentioned that its output capacitance driving capability is 1pf not more than that for which they recommend using a 20ohm resistor in series on the min I would say just try with 51ohm resistors in there and see if its stable.
The OPA2134 works great in the low and mid frequency ranges but it's slew rate isn't fast enough to do any error correction in the upper end of the audio range. The THS4082 has 10 times the slew rate but it just goes nuts and then heads for the positive rail, then overheats in operation.
One source, two preamplifiers, two power amplifiers,two full range, two woofers. - YouTube
Silberstack drive a pair of salvaged Woofers, SX drive a pair of Fane 12-250TC.
Two separate preamplifiers are used for volume setting.
Silberstack drive a pair of salvaged Woofers, SX drive a pair of Fane 12-250TC.
Two separate preamplifiers are used for volume setting.
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There are no feedback caps on the op amp itself. In the ODNF signal line from the output I've tried from 0 - 33pF, no difference.
any luck on the stability of the opamp?
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