by schematic Apex MX1, I use to stereo to mono preamp.
I combine it with the B500. results signal sounded perfect and does not eliminate the original frequency. thanks Mile. sorry my bad english.
sir mile, should I replace the R input 22k? for better sound?
I combine it with the B500. results signal sounded perfect and does not eliminate the original frequency. thanks Mile. sorry my bad english.
sir mile, should I replace the R input 22k? for better sound?
Attachments
Last edited:
My First Tube Amp
I've tried it with the specifications provided by APEX, but I have a problem on Mute / Operate Relay does not work and the red indicator lights up, if you can help me APEX? I question my view on the schematic point 4 da 5 connected goto +6.3 V and point 9 to the ground, but the PCB layout I created only 4 only connect dots and point 5 is not connected to any section. please help Mr. Mile. sorry my bad language.
regards
Damanhuri
I've tried it with the specifications provided by APEX, but I have a problem on Mute / Operate Relay does not work and the red indicator lights up, if you can help me APEX? I question my view on the schematic point 4 da 5 connected goto +6.3 V and point 9 to the ground, but the PCB layout I created only 4 only connect dots and point 5 is not connected to any section. please help Mr. Mile. sorry my bad language.
regards
Damanhuri
Attachments
PRE-AMPLIFIER-* FJROMERO
The creator of this preamplifier is known in this forum:
FJROMERO
Share this preamp:
Design of Sr: TUPOLEV.
Redesign: YIROSHI
also can be found on the website of video jukebox.
stereo preamplifier
VIDEO ROCKOLA
pdf format
The creator of this preamplifier is known in this forum:
FJROMERO
Share this preamp:
Design of Sr: TUPOLEV.
Redesign: YIROSHI
also can be found on the website of video jukebox.
stereo preamplifier
VIDEO ROCKOLA
pdf format
Last edited:
Hope I am not threadjacking. I apologize to Apex and all if I've done that inadvertently.
Hi Sergiods,
I've started this test project as a Practice (with some old components from my inventory) before I attempt to make 2 ML3 Pcbs with Apex's great design which has a better 3 band equalizer imho. I just was interested in the dual version of your post.
This project ( photo in the attachment ) will be my temporary solution until I make 2 ML3 tone controls.
Attachments
Use serial regulator from post #22 in the thread: http://www.diyaudio.com/forums/power-supplies/164365-class-preamp-psu-3.html
I made this and found a weird problem. Apparently the sound is very good. The karaoke function is very good too.
But after some 5 minutes after power up, the sound becomes distorted or even stops when the bass control is at maximum position. And a sparking noise is coming.
When I reduce Bass a little everything becomes normal again.
There is no overloading of the source. No unwanted noise. The voltages are normal too. I am using +-15V dual power supply.
What can be the problem?
I followed the construyasuvideorockola.com and the pdf file in the download section but main problem is I don't know Spanish. So no help for me there for this trouble shooting. And here I didn't want to start another thread for this problem.
If anyone faced similar problem with this and resolved it, kindly help me out.
Thank you in advance.
Yay! I remade the eq with Yiroshi's design and the problem is fixed.
Seems I messed up the PCB earlier.
I've been playing it since last 4 hours. Good sound! And No problem.
Thank you so much sir!.
Attachments
luck
Thanks for commenting friend CSOM that good this funcioando well congratulations.
Yay! I remade the eq with Yiroshi's design and the problem is fixed.
Seems I messed up the PCB earlier.
I've been playing it since last 4 hours. Good sound! And No problem.
Thank you so much sir!.
Thanks for commenting friend CSOM that good this funcioando well congratulations.