Winfield Hill's 100W, 10MHz, 1000V/uS AMP-70
Update June 1, 2019 - I have available now sets of a PCB, a mounting plate and the three DC-DC converters. Yours for € 25 or € 45 for a pair. Shipping at cost. Let me know if you are interested, there are a few sets left.
This section is about the building of Winfield Hill's AMP-70 project. AMP-70 is a test and measurement amp, that looks innocent enough as a 100W audio power amp, but with a large signal bandwidth of minimum 5MHz! This amplifier has been designed by Winfield Hill (of Art of Electronics fame) for electromagnetic field experiments, but is also a great audio power amp. Some of us have also use for it driving power supply regulators with a combination of DC and AC to measure things like PSRR and Zout as a function of frequency. AMP-70's 5A, 50V ouput capability will cover pretty much all audio power supply regulators out there. Consider this as a build thread - I will expand and amplify the page as I and others progress in completing, testing and using this amplifier.
5Jun19 - Starting with the power supply subsystem. Mounted all supply caps, did the mod for the bipolar DC-DC converter (see List of known issues). Mounted all DC-DC converters. Tested all OK.