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A Very Compact Hybrid Amp - Page 100

post #1486 of 2203
6/4/09 at 12:55pm
Quote:
Originally Posted by Ynis Avalach View Post
Bingo, the right channel's got 23V and the left exactly 12V dc offset.
Ahhhhhh...Any thoughts?
Ava
Those are the voltage measurements at the relay?
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post #1487 of 2203
6/4/09 at 1:26pm
Well yeah.
Pins 1 and 12 are 24V
Pins 3 and 4 are 12V
Pins 10 and 9 are around 23V (all to SG)

Strangely all setup points from the CTHs site checked out just fine.
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post #1488 of 2203
6/4/09 at 2:03pm
So you are saying the OL -> SG is reading 12V
OR -> SG is reading 24 V?
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post #1489 of 2203
6/4/09 at 2:53pm
Before the E12 relay that is. Sadly
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post #1490 of 2203
6/4/09 at 3:48pm
Think I found something:
Isn't R9L-D2L suppost to be at the same voltage as R9R-D2R? (Schematic)
For the right side I'm reading aprox 23V and for the left aprox 12V.
Folllowing it down the line.
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post #1491 of 2203
6/4/09 at 3:52pm
I wonder if you have d2r in backwards?
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post #1492 of 2203
6/4/09 at 4:01pm
No D2R is installed right. Just found this:

I tested Q8R and Q8L. All voltages related to SG:

Q8L says, Collector:24,12V, Base: 12,71V, Emitter: 12,12V
now Q8R gives me Collector:24,12V, Base: 23,78V, Emitter: 23,19V

So somethings wrong with one of them , I hope (I would guess Q8R).
I don't have any BC337 so have to wait until tomorrow till I can go hunting down some.

Do these messurement make sense?
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post #1493 of 2203
6/4/09 at 8:40pm
OK, I am finished Much thanks to wiatrob for the kit and the support afterward, and the guys who helped me troubleshoot it in the thread that I had started. Oh and Alex for designing this thing, for such a small amp it puts out big sound.



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post #1494 of 2203
6/5/09 at 1:49am
^^ Nice job...its a beautiful amp.
enjoy..
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post #1495 of 2203
6/5/09 at 1:58am
x2, awesome amp and nice build. It's hard to believe how good this little thing is.
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post #1496 of 2203
6/5/09 at 2:41pm
Thanks guys, was allot of fun building it. Now that I've started in this hobby I don't know if I can stop
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post #1497 of 2203
6/5/09 at 9:39pm
If anyone could help, I am wondering what the initial voltages across the LED is because mine starts as green and stays as green. My friend's goes from red to green, like it's supposed to, I am wondering if I wired the e12 incorrectly.

However, the good news is that all my voltages are correct: OG-11.82, OL-11.81, OR-11.79, TB+-96.7, pin1-79.5, pin6-80.1

As far as I'm concerned, I don't think mis-wiring the e12 will have an effect on the SQ, correct me if i'm wrong.

Thanks!
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post #1498 of 2203
6/5/09 at 9:54pm
I found the problem, I switched R8E and R9E. Will fix that tomorrow.
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post #1499 of 2203
6/5/09 at 10:23pm
IGN - best of luck with the swap, hopefully you'll be up soon! Interested to hear your impression sof this amp with the 702s, it's a combination I haven't auditioned yet..
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post #1500 of 2203
6/5/09 at 11:58pm
sigh*... these problems keep coming, i just swapped them, and my light goes from red to orange (ie both red and green diode lights up)

any suggestions?

I am loving the sound so far though, it's one thing that the music is better, but to top it off, i can feel everything much better too, the headphones diaphragms really move. Without the CTH, listening to the k702 is like eating without smell, with the CTH, the extra feeling of the headphones completely adds another sense of touch and it really helps, kinda like the speaker effect.

But really, I need to figure out why my led is orange now
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