scott2000

Re: Drip Dual-STA 5167 Limiter
« Reply #60 on: September 16, 2020, 04:31:49 AM »

EDIT: threw it into my rack and now both channels don't work right.


Ugh...  I was excited for you then I wasn't....

Output brings volume up and then down and then up again and you turn to the right.

Can you describe this in a bit more detail?  All I can picture is the hokey pokey...


Re: Drip Dual-STA 5167 Limiter
« Reply #61 on: September 16, 2020, 04:53:48 AM »

Ugh...  I was excited for you then I wasn't....

Can you describe this in a bit more detail?  All I can picture is the hokey pokey...
o

okay after playing around I think i can describe it better. Input increases volume which is a high-passes sounding signal. this is how it worked before too. but the output would bring up the whole signal including low end. it sounded very nice.

now the input works the same but the output actually brings the whole signal down as your turn into the right. when you get about halfway (12 o’clock) the signal is gone. and from 12 o’clock on the signal decreases. no low-end. completely high-passed sounding.

both channels exactly the same. one channel NEVER had a problem. which means both channels are experiencing the same problem. I actually got to hear one of them go out. it kind of just dropped out like a radio losing signal. first it was only channel one and then two went as well.  from huge lush sound to thin weak high passed.

scott2000

Re: Drip Dual-STA 5167 Limiter
« Reply #62 on: September 16, 2020, 05:20:09 AM »
Sounds like some impedance weirdness....

I'm not familiar with how these are set up as it relates to the originals but I'd probably check over the input and output pads...

You did mention that the voltages in the circuits are right on???

Re: Drip Dual-STA 5167 Limiter
« Reply #63 on: September 16, 2020, 11:32:28 AM »
I’ll have to recheck the voltages since it fizzed out but they were right on.

Re: Drip Dual-STA 5167 Limiter
« Reply #64 on: September 17, 2020, 03:12:53 PM »
Extremely interesting development. Went probing around and when I touch the "TO ATTN" point on the pcb that goes to the output attenuator. The bass smacks back and the input works normally. The output turn it down rather than up though.


UPDATE: When I probe the 3 points with a continuity meter that go to the attenuator labeled "com", "to atten" "from atten", Those particular parts of the unit begin working. I probe all 3 separately, the unit WORKS. There is something going on with the grounding! The way it died I'd say it could be one of the resistors that go to ground. But all of the resistors are metal film and look totally fine.

And....If I follow that rabbit hole down. I find that If I do a continuity test on secondary high and secondary low of the transformer separately...I get the sound that I should be getting from those to come through the music I'm putting through the unit. What kind of wacky stuff is happening...?


Final update:

.....

The problem was with my patchbay. When I plugged straight into my converters my signal is perfect. Discovered accidentally.

Goodnight.


Ryan
« Last Edit: September 17, 2020, 08:57:47 PM by FarisElek »

JMan

Re: Drip Dual-STA 5167 Limiter
« Reply #65 on: September 18, 2020, 08:01:20 PM »
The problem was with my patchbay. When I plugged straight into my converters my signal is perfect. Discovered accidentally.

Goodnight.


Ryan

I was so happy to see this update!  Congratulations!

I *will* eventually get to this build...

Re: Drip Dual-STA 5167 Limiter
« Reply #66 on: September 18, 2020, 08:41:59 PM »
Sage advice: If you re-wired your patchbay to fit your new creation and suddenly it’s signal is messed up...double-check straight to your converters. In my case I built all the xlr to trs cables myself and literally the two of them I was using  both lost their connections to negative on the trs. I’ve been using them for years but this time just happened to be the time they both loosened up.

While troubleshooting I learned that you should connect both CT wires to the left-most choke terminal if you’re using a choke. It fixed my 300 voltage which was under voltage on both channels to about 310-315v per channel which I was able to adjust with the 5k trimmer to the perfect voltage.

Sounds amazing. Even with the solid state psu + choke. On bass I get a really farty saturated bass tones when I crank it. Really thickens mixes on mix-bus. I’m still figuring out how to use it but it’s sounding amazing.


Very curious tho. Is there way to calculate how much compression is happening to a signal just to verify it’s working perfectly? Due to lack of threshold knob it’s hard to figure out how much compression is happening besides the meter.
« Last Edit: September 18, 2020, 10:06:12 PM by FarisElek »

rob_gould

Re: Drip Dual-STA 5167 Limiter
« Reply #67 on: Today at 05:45:45 AM »

Well done!

I've been following this with interest and you really got a raw deal. The thing with the transformer pin! Aaargh! But great that you've got there in the end 🙂

Too late now for advice of course, but yes - the issue you described defo sounded like something outside the compressor. It was going to be my suggestion to start bypassing wiring until I read down and saw you'd cracked it.

Enjoy!
Studio furniture, modular synth cases and more...

www.gouldcaseworks.nl


 

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