fallout

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #460 on: October 06, 2020, 08:37:08 PM »
I poorly photoshopped one for myself and it's working out fine on my Drip build. If anyone has a better one you should probably use theres but in the meantime.

Thank you! It doesn't look bad at all.


SKJGProject

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #461 on: October 13, 2020, 10:42:09 AM »
will try to work on this in 2020....anyone wants to share his mouser cart/project?

anyone?
I used to date a blind girl. Her name was ::… ..:.: .:::. .::.. ….: .:.::

fallout

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #462 on: October 14, 2020, 01:12:20 PM »
anyone?

I have a Mouser project for the main PSU and Bias PCBs I can share but that said, I'm using some parts that you may or may not not want to use such as Molex headers/housings instead of the screw terminals, etc. I also skipped all of the .25W resistors as I had them on hand.

I can also share my Mouser cart for the Main PCB but it's incomplete as I had some of the stuff on hand and again, I might be using parts that you're not too keen on using for your build.
« Last Edit: October 15, 2020, 10:51:44 AM by fallout »

Dr_J

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #463 on: October 17, 2020, 04:41:35 PM »
Hi,

i blew the dust of my half finished unit after laying around nearly 5 years... ::)
(but that's another story...)

I just finished wiring and powered it on the first time, no smoke :)  - tubes are glowing  :)

I measured the test points. Some values seem to be a bit high. Should i go for R3?

But what makes me really nervous is that some values are jumping around! (No audio input)
Any quick ideas on that?

ROCK-ON!

« Last Edit: October 18, 2020, 05:57:44 AM by Dr_J »

Dr_J

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #464 on: October 21, 2020, 03:00:50 PM »
Hey,

found some time to go on.

Put some audio through, sounds not to bad for the first start...  :D

Then I calibrated (momentary switch) the unit. Worked fine.
The Meter isn't hooked up yet.

Then I measured again and the good news was that now all values are stabile :D
But some are still high out of range. Something to worry about?

The noise level is still not satisfying:
[email protected] (Output fully ccw, SLOW MODE)
[email protected] (Output fully ccw, DOUBLE MODE)
[email protected] (Output fully ccw, TRIPLE MODE)

The DOUBLE MODE shows a repeating pop/hum sound. (No audio in)
It's starts at input around 9 o'clock, frequency increases when input turning cw,
>3 o'clock it disappears. Similar behavior on TRIPLE MODE.

The output is way to high. I'll have to go for a pad!
[email protected] INPUT (SLOW MODE)
1.07VAC IN => 9.7VAC OUT  :o
0.09VAC IN => 2.1VAC OUT 

I guess the pad will work on the noise floor although.

My power TX gets hand warm, normal?

ROCK-ON!
« Last Edit: October 21, 2020, 04:33:40 PM by Dr_J »

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #465 on: October 21, 2020, 06:45:24 PM »

Then I measured again and the good news was that now all values are stabile :D
But some are still high out of range. Something to worry about?

The noise level is still not satisfying:
[email protected] (Output fully ccw, SLOW MODE)
[email protected] (Output fully ccw, DOUBLE MODE)
[email protected] (Output fully ccw, TRIPLE MODE)

The DOUBLE MODE shows a repeating pop/hum sound. (No audio in)
It's starts at input around 9 o'clock, frequency increases when input turning cw,
>3 o'clock it disappears. Similar behavior on TRIPLE MODE.

I don't know if this will relate to the designations on your build, but check your R37/C11/switch, etc and make sure they're doing what is indicated on the original schematic. I had this exact thing in a build where there was a cold joint in that section.     

My power TX gets hand warm, normal?
Power transformers do that.

Dr_J

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #466 on: October 21, 2020, 09:09:40 PM »
Hey,

thanks alot Bowie!!

In the mean time I found one mistake; stupid man: i'm i forgot the solder bridges on the MODE/RECOVER PCB...  :-[

At SINGLE MODE the noise floor is now [email protected]!!
It's working fine, i'll think.   :)

BUT on DOUBLE and TRIPLE MODE then I got a loud motor-boat/distortion >10 o'clock!!  >:(

Thanks to Bowie, I re-soldered some joints from BOTH sides of the pcb!!
Now it's quite.  :D
Noise Level on all Modes now around [email protected]  ;D
(Not sure if it now works correctly, changing the modes seams to make no big difference...)

So far so good!

Next, i'll have to put the H-pad into it...

ROCK-ON!



« Last Edit: October 22, 2020, 01:04:59 PM by Dr_J »

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #467 on: October 22, 2020, 12:58:56 PM »
Thanks to Bowie, I re-soldered some joints from BOTH sides of the pcb!!
Now it's quite.  :D
Noise Level on all Modes now around [email protected]  ;D
(Not sure if it now works correctly, changing the modes seams to make no big difference...)

Great to hear!
Regarding the difference it makes, run some material with a prominent beat/kick and you should be able to hear it working.

Dr_J

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #468 on: October 22, 2020, 01:18:26 PM »
Hey Bowie,

thanks for the tip.

In the meantime I tried some Snare Track, with that I was able to hear (a bit of) difference between
the modes and the recover settings.
I also watched the youtube video bernd posted. I think mine is behaving similar.

So far so good. I'll go on.
Next output H-Pad, hooking up the meter and posting some pix  ;)


ROCK-ON!

Dr_J

Re: [BUILD] STA LEVEL PCB OFFICIAL BUILD & HELP THREAD
« Reply #469 on: October 23, 2020, 12:27:00 PM »
Hey,

did some quick audio testing and printed some audio (snare track and drum room track).
There's nearly no visible difference between the waveforms when switching around  >:(
Here's something not working right. I'll have to check the control board PCB again.

ROCK-ON!