LTspice
is it possible to send the ltspice file of the schematic to have boards made?
Lawrence
is it possible to send the ltspice file of the schematic to have boards made?
Lawrence
I can't be doing with wires everywhere (lol). I even considered having the speaker leads go under the floor and emerge at the destinations but they are not intrusively visible normally.
A duet (or is it a duel).
alex mm did some pretty decent boards a while ago and there are layouts and so on here, post #300
http://www.diyaudio.com/forums/soli...-amplifier-designed-music-15.html#post3169796
Terry was the latest to build the amp, post #601
http://www.diyaudio.com/forums/soli...-amplifier-designed-music-31.html#post4626588
ok I asked but if you know about LTspice maybe i can just get some made form the software?
Lawrence
One day maybe, but being in a rental and having against one wall
PC (for communal stuff like netflix)
music server)
digital piano
Wii
TV
Bluray
Stereo
Sub
Heat gun
It's a bit full of wire 🙂
Oh and 12ft by 11ft and we need to be able to fit 6 in there. I really need somewhere bigger !
I do wonder. The daughters are better players than I am. They would probably love that.
Still playing with the 430
More Bias does not = better sound anymore it maybe more pleasing in ways (smeared) but nice but definitely not more musically correct ...can you say FAT!
still will be playing with it but these are my observations...
possibly less measurable distortion but sounding wrong in a lot of ways
so back to 53ma then
More Bias does not = better sound anymore it maybe more pleasing in ways (smeared) but nice but definitely not more musically correct ...can you say FAT!
still will be playing with it but these are my observations...
possibly less measurable distortion but sounding wrong in a lot of ways
so back to 53ma then
Post #312 in the thread has a zipped folder of the spice files but you can't make boards from that. They are diagrams for simulation, and as such not totally reflecting the exact real build in areas such as decoupling. If I recall correctly the servo isn't included either in those simulation files.
You would have to input the circuit diagram into something like DipTrace to do a board, or better still design it free hand (not autorouted) because that way you can get all the grounding and layout correct. All the component patterns have to be correct too.
Its a major task I'm afraid.
Well kind sucks ...so no one is making boards?
It's your build my friend maybe you can do it??
Lawrence
It's your build my friend maybe you can do it??
Lawrence
Hahaha! You must be having good ears. Yes, you should notice/hear that kind of compromise.
I've other projects on the go at the moment, so have neither time nor inclination I'm afraid.
Every time I compare BJTs by ears (including original old BJT stuffs) in a circuit without adjustment, I always found that the Sanken and Toshiba (C5200) are both special. I don't know what properties are responsible for that (fT is obviously higher than old BJTs'), may be internal resistance causing higher bias I have never bothered to check...
But these 2 BJTs are unique, with the Sanken has the strength on "impact" and more immunity to RF/oscillation. In general it is easier to work with the Sanken than the Toshiba. But the Toshiba is my favorite, once it works...
I think what makes quasi-BJT "works" for you is the "impact" that makes bass slam sounds real and no "ringing" of the impulse. That's why I mentioned the Sanken (2SC2922 to be precise), not the Toshiba.
Again, every time I plug in various BJTs in the same circuit WITHOUT adjustments, both Sanken and Toshiba always win with big margin (I believe it is easily audible). The difference between the Sanken and Toshiba is much less... But I don't know if it will work so obviously or not in a quasi topology, because it could be just because newer BJTs have better PNP performance than older BJTs...
No, I don't know if there will be improvement or not. I don't have many complementary TO-3 steel transistors, but from what I have tried they are good as well.
Plug and play? With certain circuit, output stage replacement with much faster transistor like this may lead to oscillation. Opamp based amplifier is an example. Discrete darlington output could be another. Other circuits that I have tried had no issue with plug and play (but of course I'm ready with increasing compensation caps etc if it was expected to happen).
This is a BIG question. You have mentioned that your amp is close to the real thing, i.e. very natural. But I have observed that when bass is "natural", mid/vocal tends to be not natural and when mid/vocal is natural (really natural), bass is so-so!
Quasi amp like yours tend to be natural in bass section, but I doubt the mid/vocal section. This is exactly why I prefer Toshiba to Sanken. This is my taste, vocal over bass. But the speaker must be "correct" so that natural midrange has great value. And I believe many people have never heard a natural midrange because of the speaker ruins it.
Yes I totally agree but my system essentially is put together(designed) I use large fulton peremere which has IMO one of the very very very best of mid-ranges ...people like the quad 57 because of its fab midrange but what the quad and most electrostatics miss is the human quality with realistic sounding tonal colors electrostatics are very clean...but but with somewhat missing the human quality we hear live
what I am saying here is my system was voiced with this amplifier when being designed because of its totally musical character ..so from top to bottom this plays more correct like the real thing
most people poo poo it but IMO its tops! I wish there was a better "alternative" hence my postings
Lawrence
Seems to me you know exactly what I mean with natural midrange.
I'm very interested with your finding of the amp capability, BUT, the only barrier for me to try the H/K 430 right away is the fact that it is only 25W. I assume that I will be happier going with class-A if only for that power.
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