1

TS500 Tape Simulator / Re: Drive Poti not working

« on: December 30, 2021, 12:45:45 AM »

everything seems fine, cant wait to test in the studio! [SOLVED] it myself haha

2

TS500 Tape Simulator / Re: Drive Poti not working

« on: December 29, 2021, 11:00:51 PM »

Please give me another 30 minutes to check. I think I'm on the right track, I discovered a badly soldered IC and will test again.

Though I discovered the two potis differ in value. Measuring 10.35k on the OUTPUT (P2) and 8.7k on the INPUT (P1).

I will report ;-)

3

TS500 Tape Simulator / Drive Poti not working

« on: December 29, 2021, 10:18:50 PM »

I assembled two TS500 units. First one is working fine, test setup worked well.

The second unit is not working correct: The DRIVE knob has little to no function

Output Signal is quieter when unit is ON. Output Signal is much louder when unit is OFF (bypassed)
> With DRIVE and OUTPUT on 10 and an input signal of 0.4VAC I get
- Unit ON = o.126 VAC (measured on XLR Outputs)
- Unit OFF = 1.254 VAC (measured on XLR Outputs)

Is there a way to check the poti easily? I am still very new to DIY, though I paid great attention to every detail in the build. Not sure what could have gotten wrong.

Thanks!
Julian

4

CP4500 Stereo Bus Compressor / Re: DMM says 0.3 VAC instead of 3.0 VAC

« on: November 15, 2021, 10:33:24 AM »

Thanks for maintaining the forum so well! I did not expect the rubix to be that "weak". Completely assembled the CP4500 and tested in the studio, I am really happy with it! Cheers

5

CP4500 Stereo Bus Compressor / Re: DMM says 0.3 VAC instead of 3.0 VAC

« on: November 11, 2021, 11:34:08 AM »

really strange: I went through the testing procedure "In case your CP4500 doesn't work as expected".. and everything was fine (except for the voltage not reading 3.0VAC, no matter how hard I cranked the output of my interface). Since I am not in the studio building the compressor, I use my home desktop USB interface which is a Roland Rubix22.

I then threw an Apogee Groove Dongle USB Interface at my mac and all of a sudden I get 3.0 VAC. I wonder if the interface is really suffering from output power or if there could be another reason for not getting enough volts...? So far so good. I will proceed with the setup guide

Cheers!

6

CP4500 Stereo Bus Compressor / DMM says 0.3 VAC instead of 3.0 VAC

« on: November 10, 2021, 10:41:22 PM »

Here is where I am: Setup Channel 1, Step 6.

Signalflow: line level XLR from my USB Audio interface > into Monitor Controller > into Heritage Audio OST-4 V2 lunchbox > CP4500 connected via XT500 extension.

Doublechecked the CP4500:
Threshold +15
Makeup 0
Mix 100%

From Pro Tools Signal Generator, I am already sending 0dBFS and a fair amount of gain through my Monitor Controller into the lunchbox > CP4500. Can't get the DMM say 3.0 VAC staying within reasonable output gain of the monitor controller. DMM reads 0.3 VAC. Trimmers + Threshold + Makeup Gain work as expected.

I am new to DIY (and admittedly, using a DMM as well) - so just to doublecheck: The DMM should be connected to pins 2 (+) and 3 (-) of the XT500 (TP positions "2" and "4") / respectively of the XLR output pins of the Lunchbox..? I tried each combination, but no 3.0 VAC with makeup gain at 0.

Not sure If i can proceed to the next PCB like this

Thanks in advance!

PS: in case the pictures below show as gigantic as on my screen, with shift + mousewheel I am able to scroll right where you can see the pins etc.