Search found 7 matches
- Tue May 29, 2018 8:59 pm
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 402454
Re: 8PAKAMP KIT BUILD THREAD
Thanks a lot Joe ;) Well, to test if the amp clips, may I use a repeated 1000hz sine signal track on the dap or better on my cd player, and look at the output (with a 50w 8R res load) with a scope to see if the sine begins to turn to square at highest volume? Also, no stability issues when bridged o...
- Tue May 29, 2018 4:49 pm
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 402454
Re: 8PAKAMP KIT BUILD THREAD
So like this?
- Mon May 28, 2018 2:17 am
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 402454
Re: 8PAKAMP KIT BUILD THREAD
Well Amp finished and boxed ;) https://drive.google.com/uc?id=13W2WHEcl53nTmjkuQjWO0y3aY7zkYvTp https://drive.google.com/uc?id=1DR0ZyxzMARVAt1okD9h19g1mjNvYrxIL You may notice that a channel misses a 1000uf cap, it's because I fried one chip when doing tests (a bit of solder stuck between pins)... :...
- Mon May 21, 2018 8:58 pm
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 402454
Re: 8PAKAMP KIT BUILD THREAD
Thanks a lot Joe for all your advises
Now the amp is working plenty good with the LXMini, the only remaining thing is that the gain is quite low (although I shorted R3 and R4 and installed a fixed 10K res in place of the trimpot).
Shall I reduce R11 to something like 470R to get more gain?
Now the amp is working plenty good with the LXMini, the only remaining thing is that the gain is quite low (although I shorted R3 and R4 and installed a fixed 10K res in place of the trimpot).
Shall I reduce R11 to something like 470R to get more gain?
- Fri May 04, 2018 7:57 am
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 402454
Re: 8PAKAMP KIT BUILD THREAD
Seems like it works ;) I put 47R res across each rcas and no more AC voltage on output when no signal present :) no thump on startup or shutdown, clean sound.....cool Does the presence of those res modifies the input sensitivity in anyway or/and does it change the frequency response? I still had a s...
- Thu May 03, 2018 6:23 am
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 402454
Re: 8PAKAMP KIT BUILD THREAD
Well, seems like I wired then in parallel..... I've redone the wiring in serie and I don't have the voltage sag anymore, nor any DC offset on output, my bad. Thanks for pointing out my mistake. However I still have the problem of AC voltage on output until actual music signal is played. With my dap ...
- Thu Apr 26, 2018 6:54 pm
- Forum: JLM Audio Kits
- Topic: 8PAKAMP & 12PAKAMP KIT BUILD THREAD
- Replies: 125
- Views: 402454
Re: 8PAKAMP KIT BUILD THREAD
Hi everyone, Before everything else let me introduce myself. I'm a french audio enthusiast, and i've been hooked by the DIY virus some years ago. Since then I've already build a large number of gears (Pass F5/M2/Aleph/B1, Tubelab SSE, 300B se, some lm3886 stereo amp, some AB amps, a shigaraki MKIII ...