Still4,So, P30 is working.. square at 50 kHz is fine...combination with AX14 perfect sound.
how do your 50kHz sqw compare to this? post4756
Still4,
how do your 50kHz sqw compare to this? post4756
On the P30 alone, Yes pretty close. Not from full setup, though it looks very good.
So, P30 is working.. square at 50 kHz is fine...combination with AX14 perfect sound.
Nice work,
Regards
Did you adjust the RF attenuator values, or are you still claiming you don't understand?
no
Here is one classic RIAA stage using CFA topology from the past. Very easy to build, simple and is not difficult to design pcb. Just a couple of transistors.🙂 You shall be surprised how good it is. If somebody has time to design it, it would be nice to post pcb pdf.Just like a monolythic opamp, this is why I think smt is the best to use for such a design.
I would have to say it is the most elaborate MM phono yet for me to lay my eyes on!! and I do not know of any other CFA type phono pre-amp either.
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OK, I will... Alex, what kind of isolator do you use for transistors? Is it kapton foil? I usually using mica...
Hi all.... P30 is an CFA preamplifier ? How does it sound ?
Thanks.
P30 is fully complementary simetrical CFA preamplifier.
Yes it's kapton tape with silicon grease ...... and mica will be also good 🙂OK, I will... Alex, what kind of isolator do you use for transistors? Is it kapton foil? I usually using mica...
Regards,Alex
Hi Alex, do you by any chance have a pcb for a stereo preamp with volume and tone controls, discrete or op-amp based doesn't matter. I can only make single sided boards.
Regards
Regards
8 Channel APEX A-14 amp build finished, sound awesome. Loud and clear , super silent and perfect of home audio.
Using as 7.1 audio system, with 12inch sealed sub-woofer driven by APEX B500 amp. Getting 7.1 channel analog output via Asus Xonar DX sound card and PC.
Listening to music is a pleasure. And playing GTA-V (PC Game) with surround sound effects is real fun. During game play all channels perfectly creates detailed surrounding audio effects around the player.
Thanks Apex for sharing such a nice amp with us.
Rakesh Sharma
Using as 7.1 audio system, with 12inch sealed sub-woofer driven by APEX B500 amp. Getting 7.1 channel analog output via Asus Xonar DX sound card and PC.
Listening to music is a pleasure. And playing GTA-V (PC Game) with surround sound effects is real fun. During game play all channels perfectly creates detailed surrounding audio effects around the player.
Thanks Apex for sharing such a nice amp with us.
Rakesh Sharma
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