gyraf

Re: Build Thread:MSHOL
« Reply #20 on: February 19, 2018, 09:56:29 AM »
..maybe try dropping in the recommended type opamps, just to exclude the possibility that you are looking at HF instability?

Jakob E.
..note to self: don't let Harman run your company..


Jonas05

Re: Build Thread:MSHOL
« Reply #21 on: February 23, 2018, 04:44:26 AM »
I tried it with the Ne5532/34 but it's still the same. I would tend to say that the difference in level comes from the compression... adjusting the level by turning the threshold sounds more similar than by using the output gain. But still it seems to me like one channel also sounds a bit better.

gyraf

Re: Build Thread:MSHOL
« Reply #22 on: February 25, 2018, 06:21:30 AM »
But still it seems to me like one channel also sounds a bit better.

Sorry, too vague to form basis for error-tracing...

Jakob E.
..note to self: don't let Harman run your company..

Re: Build Thread:MSHOL
« Reply #23 on: February 25, 2018, 08:58:45 AM »
I tried it with the Ne5532/34 but it's still the same. I would tend to say that the difference in level comes from the compression... adjusting the level by turning the threshold sounds more similar than by using the output gain. But still it seems to me like one channel also sounds a bit better.

Are you the same person I had asking for assistance by mail?

Did you make sure to check the wiring of the mode-switch? I can be wired wrong, so it  doesnt do MS/split or link, but rather MS, MS+link and link.

Gustav

Jonas05

Re: Build Thread:MSHOL
« Reply #24 on: February 26, 2018, 09:38:29 AM »
Are you the same person I had asking for assistance by mail?

Did you make sure to check the wiring of the mode-switch? I can be wired wrong, so it  doesnt do MS/split or link, but rather MS, MS+link and link.

Gustav

We mailed maybe two years ago about some of your borads but not right now. I have the old HOL boards, not the M/S version.
So I guess I will compare the two channes and track a sine wave and see where it starts to lose level.

erquere

Re: Build Thread:MSHOL
« Reply #25 on: June 08, 2020, 06:07:59 PM »
Hi ! I have problem with a MSHOL i built for a friend. It goes crazy (including vu-meters) about ten minutes after switched on, and I don't know where this can come from. I tested it at home during one hour, no problem, but in his studio it does the  same sh.t (It worked fine during one month...)
Logically seems to be something getting too hot inside it, could it come from the PSU ? What VA value could you recommend me ? The one inside is a Velleman 15VA.
Same problem with a W492 I built for him too, seems that some 5532 burnt, despite the pcbgrinder PSU board... I'm quite lost, not sure his domestic current is stable...

Hope you can help me !
Used to be a journalist but I prefer build comps and eqs

gyraf

Re: Build Thread:MSHOL
« Reply #26 on: June 09, 2020, 06:38:36 AM »
check if you loose one of your power rails when it happens, in that case it's probably a regulator overheating and shutting down..
..note to self: don't let Harman run your company..