Post your Solid State pics here.

[zhubin]

Hi,all.
Here's main circuit:

[geminni]

This is my preamplifier in cd-rom case, made for my music studio.
Some more information can be found on topic:
Peamplifier and active crossover, working project

[jleaman]

Originally Posted by geminni

This is my preamplifier in cd-rom case, made for my music studio.
Some more information can be found on topic:
Peamplifier and active crossover, working project

looks good, i would dee-burr that heat sinks, and remove all those metal shavings that could fall off soon. Wouldent want any shorts.

[geminni]

You are wright, I did not noticed those because I was in a hurry to finish it

[Mooly]

Originally Posted by zhubin

Hi,all.
Here's main circuit:

Thanks for posting the circuit... always interesting to see.
I did some tests on non gfb amps, and the results were very surprising (really good) but I never developed it further.
I imagine your amp sounds very good... nice to see something different.

[zhubin]

Originally Posted by Mooly

Thanks for posting the circuit... always interesting to see.
I did some tests on non gfb amps, and the results were very surprising (really good) but I never developed it further.
I imagine your amp sounds very good... nice to see something different.

I had DIY some NFB or non-loop NFB amps many years ago and compared them, I found non-loop NFB amps was fine ,transparency, fast ,especially called ”alive” sound, i like it.

[ostripper]

Just finished my Luxman M-120 "big brother" build. This is a project that will NEVER end as it is the "last stop" for auditioning my modular creations.

Picture #1 is the whole "dog" .. born a month ago and put through hell , even shorted out my yours truly...


Picture # 2 is what I hear , a modular Luxman/GX1 card , feeding a 8 output PB250 BJT - EF2 stage. power is conservative 200W /8R.. have seen actual 110V p/p on scope while in actual use. (police came soon after )

Picture # 3 is the new PS100 CLC power supply with 2 stage ground - 65,200 uF @ 100WV in place , replaced 20 year old Nichicon "bulging caps". Soundstage and headroom became MUCH better after this addition.

Picture # 4 is a night shot ... who says Xmas is in december. Really , blue and reds mean "do not touch" , amp is 1KVA/ + - 75V which can kill easily.

OS

[Bonsai]

Good Result OStripper - I know you have been working on this for a few months but finally its come together. From what you say, it measures well, and I hope it sounds as good too.

[kees52]

Originally Posted by Mooly

Thanks for posting the circuit... always interesting to see.
I did some tests on non gfb amps, and the results were very surprising (really good) but I never developed it further.
I imagine your amp sounds very good... nice to see something different.

Hi there

I always likes amps with no feedback, or are my eyes not clear? why you have a higher voltage in the driver part? be carefull with that, only fets need + AND - 8 volts extra in the driver, bipolair not really.I like also the super emitter version vor a low ohms output and a high brake for the speaker, but with no feedback it wil always higher I have tubes as drivers no feedback dc coupled tot the mosfets, sounds very soundstage like with good speakers like fostex horn and tapped horn.

For better liniarity use ring emmiter transtitors in the power stage, for example sanken, maybe there are also lower power ring emmiters for driving, then you have something special and liniair even without feedback, it is a nice tryout.



looks nice I will test it later in multisim.

greetz

[zhubin]

always likes amps with no feedback, or are my eyes not clear? why you have a higher voltage in the driver part? be carefull with that, only fets need + AND - 8 volts extra in the driver, bipolair not really.I like also the super emitter version vor a low ohms output and a high brake for the speaker, but with no feedback it wil always higher I have tubes as drivers no feedback dc coupled tot the mosfets, sounds very soundstage like with good speakers like fostex horn and tapped horn

Hi
a, Consider you home supply voltage will be down 5~10% some times ,so i take a higher.
b, choose a low emitter resistance can only supply higher current to drive sperker,but can't return the current to transistor circuit fou brake.

i don't know well as multisim but interest in the resouts if possble.

regard