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In the Forum: Melquiades Amplifier
In the Thread: Planning my DSET
Post Subject: Some thoughts.Posted by Romy the Cat on: 2/15/2018
You decided to go with mA or are they mV against 1R resistors?
I prefer the second approach personally and I feel that I can moderate the quality
of resistor and I can’t moderate the quality of the milliampere meter coil.
The whole thing looks like very well thought out. A few comments
I would like to pass.
You are right now in a very interesting state when you do
the internal wiring. The internal wiring. Is to a degree is an art form and it might
be very interesting. There are low and high voltages, AC and DC, twisting and
not, crossing with minimum angles, some transmission line considerations,
signal wires, grounding, approximations, shortening wire paths, maintainability,
ease to access and many other considerations that you need to keep in
perspective. It is very interesting and creative phases, do not harry to go through
with it, spend some time and do it better and methodological. Do the same wiring
schema for both R and L amplifiers. When you will be doing the second amp you
will find better way to wire it. It is debatable if you want to improve the
second one or to the second one as a direct replica of the first one. BTW, did
you do it as two identical or you went full-throttle and made it mirroring?
Also, if everything is works fine then the only part that
you might need access it future will be the input filters in case you want to experiment
with drivers or do channels adjustments. Make it accessible. Do not forget to
do a full sweep of the individual channel after you will be done. You need to
make sure that the channels and the filters are working properly.
The last thing. Do buy for yourself a Phase Testers. This is
absolutely mandatory tool for your speakers. They call it “Speaker polarity
tester”. I use the track #23 from Sheffield Labs
https://www.amazon.com/Sheffield-A2TB-Test-Disc-My/dp/B000V93NKY
Depends what tester you use you might not have a sensitivity
of you tester to test at LF. There are some techniques how to deal with it. Anyhow,
even a cheap $10 tester for Car Audio is better than to spend half of life to worry
where is black and where is red binding posts.Rerurn to Romy the Cat's Site