sounds about right, that's why I use blunt tools🙂 But for tapping, I always use sharp new drill bits on aluminium, and always use meths as a lubricant.
Nice chassis work Jeff!
Question... Seems like you're using four PSUs in your build, why is that?
Thanks
Do
Question... Seems like you're using four PSUs in your build, why is that?
Thanks
Do
Tested the amplifier with 2R load at high power and I have nor seen peaks over 500mV on the OC protection. So I have to look elsewhere. I did however ground the chassis just before the tests, maybe it shields against some of the interference..?
Do
Do
A good question 🙂
The point is that I did not prototype the Lichtstark-X yet.
On contrary, Tribute-3000 plays on my test bench almost constantly these days. That's the main difference right now 🙂
It would be interesting to compare though, so I will put the Lichtstark into my plan.
Housing
Small progress, but progress.😉
Yes i know, screws are not ideal but that's i have on hand plus that give the opportunity for micro adjustment on the aluminium plates.
Maybe this is more beautiful.
Small progress, but progress.😉
Yes i know, screws are not ideal but that's i have on hand plus that give the opportunity for micro adjustment on the aluminium plates.
Maybe this is more beautiful.
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Transformers for the new supply arrived. I get the right voltages, and i can adjust rail voltages between 53-70V.
Did also a quick live test on my NS amp using TubSuMo IPS. Initially i got huge offsets(about 10V) and the amp entered in DC protection, this happens if you forget to connect ips supply ground and amplifier ground - stupid me. In the end everything come out fine. I still hear hiss in the speakers.
Did also a quick live test on my NS amp using TubSuMo IPS. Initially i got huge offsets(about 10V) and the amp entered in DC protection, this happens if you forget to connect ips supply ground and amplifier ground - stupid me. In the end everything come out fine. I still hear hiss in the speakers.
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We need to figure out where your hiss is coming from. Can you measure AC voltage on the output with the input shorted and a dummy load connected to the output? It would be nice to know what sort of levels we are looking for.
In some cases, hiss may be heard if the input is open. However, as soon as it's connected to some relatively low-impedance output (preamp), it goes away.
There is nothing to worry, in my opinion. I can hear the hiss only if i put my ear to the tweeter. It is very low level.
I like it alot. In fact after it put it in the amplifier i did not change it with another ips. The sound is top class, detailed and well balanced. The hights are a little softer than other ips, it is the only ips that i like to listen with the speaker grills off.
It is not a sound to impress, is more like something you can listen on a daily basis without causing fatigue.