Bikerbob's H5 C1 build

[Bikerbob]

DSC_2104.JPG


My quick bodge test agrees. No more floppy noises through audio. :D
The MouSTer is still noisy unfortunately :roll:

OK, so you are using the std audio output through the VIDEO OUT?

and you did the connection and it quieted down?

I am getting the extra "noise" weather I have a floppy connected or no. But I will give this a try.

Dave you are grounding pins 2 and 4?

James

[Bikerbob]

Just to show it off. This is my IDE drive I am using in the H5 from my Lightning.

20211206_155228.jpg

No idea if I will need to power it externally or it says it can draw power from IDE pin 20.. I guess I will ask the Lightning fellows.

edit - ide pin 20 does not seem to work.. external works.. but I cannot get HDDRiver or EMUTOS to see it.

James

[DaveC]

OK, so you are using the std audio output through the VIDEO OUT?

and you did the connection and it quieted down?

I am getting the extra "noise" weather I have a floppy connected or no. But I will give this a try.

Dave you are grounding pins 2 and 4?

James

Yeah I'm using the standard video audio out through a scart cable. There's definitely less noise overall not just from whatever is attached to the floppy connector while in use.

I'd already soldered the pin headers for the S2 in place so yes I'm grounding the second and 4th pins up on the right side. It may well be easier to do the same on the 4 pin connector next to it as @exxos suggested.

Though with the Lightening in place I've no idea how much room you have to play with there. Looks like it covers all the bits you need to make connections between.

[Bikerbob]

OK, so you are using the std audio output through the VIDEO OUT?

and you did the connection and it quieted down?

I am getting the extra "noise" weather I have a floppy connected or no. But I will give this a try.

Dave you are grounding pins 2 and 4?

James

Yeah I'm using the standard video audio out through a scart cable. There's definitely less noise overall not just from whatever is attached to the floppy connector while in use.

I'd already soldered the pin headers for the S2 in place so yes I'm grounding the second and 4th pins up on the right side. It may well be easier to do the same on the 4 pin connector next to it as @exxos suggested.

Though with the Lightening in place I've no idea how much room you have to play with there. Looks like it covers all the bits you need to make connections between.

My noise level is significant. I also wonder if the Video adapter on the monitor side, is part of it. I am using a UBE switch or one made by Centurian Tech. The Centurian tech seems worse than the UBE but both are LOUD. At home I have a DIY switch I made I am using on my MEGAST and it has a length of cable away from the machine.. then the box.. I wonder if getting that circuit and the audio plug away from the psu and other noise-generating things is part of the solution.

OK, so the pins exxos has pointed out.. to ground. GOT IT! I have to remove the lightning to do it.. then I do.

Wondering.. I have the VGA connector to use on the board.. maybe overall it would be better to use the VGA and a 3.5mm audio out socket. What do you think Exxos?

James

[exxos]

Wondering.. I have the VGA connector to use on the board.. maybe overall it would be better to use the VGA and a 3.5mm audio out socket. What do you think Exxos?

Quite possibly yes. The idea of the H5 VGA socket is so that you do not need a ST2VGA switch in the first place.

[sporniket]

Hello, it may be silly, but what kind of plug all your hardware is plugged to ?

I remember a long time ago, when I started playing electric guitar and recording, I had some noticiable noise, kind of a hum with oscillations, and it turns out it was the cheap unbranded multiple-plug block used to plug all my stuff on the same wallplug that was the source of that. When I switched to a branded one, no more noise.

[Bikerbob]

unfortunately, it is just with this board, no other ST machine (and I have a lot) is having the same issues, with the same plug, powerbar, Monitor, speakers etc..

I have not done it yet, but I think the next Step is to go back to stock machine.. remove everything I can .. I am going to put the VGA socket in.. and mount a 3.5mm audio socket for the sound output. Do the mod suggested for the AMP.. because I do not intend to add anything else sound wise.

Then power it on there.. NO other addons, no floppy, no HDD nothing.. see if I still get the sound. I will then start adding things back to the board. Hopefully I dont get it again.

It is a loud enough overall hum that I would not use this machine for anything that requires sound.. and that would be a shame to build this and then not want to use it because of this small irritation.

James

[exxos]

Have you done the new mod ? it would be far quicker than messing about doing loads of other stuff when the mod has been proven already to solve the audio problems.

I can't talk about mouster , I don't know why that would cause problems. It uses the same keyboard wires as the keyboard does, so the entire keyboard and mouser would also cause problems. To my knowledge , nobody has report such issues on any of the remake boards. Does a normal mouse or joystick cause problems ?

I think @Badwolf sent me his version some weeks ago, so I will try and find time soon try try it on my C1 to see if I get the same problem or not. But I can't fix really fix problems with other peoples hardware if it only causes problems with that one item.

[Bikerbob]

OK, so back working on this again. :)

I have installed the VGA socket. So the next things are this.

h5c1.jpg

This looks correct to me. I am going to jumper pins 1 -2 and 2 -4 on the S2 midi synth for the sound fix..

Once I get this back together.. I am going to start up a minimal setup. I might go back and put the exxos DUAL TOS and decoder in. See if I have the sound issues. IF no.. then add back my addons.. if not.. then :(

James

[Icky]

@Bikerbob - putting the audio jack where the PSU connector should be will work. I did just the same on my H5 using a 3D printed block to get the right height and used some glue to fix it in place.