Re: [BUILD] New FET/RACK Official Help Thread - Please read first post!
« Reply #900 on: November 14, 2017, 06:58:57 PM »
Few things:

1. Fuse is in?
2. All three L brackets have the PCB secured to the enclosure?
3. DMM set to DC?
4. Do you have <0 ohm of resistance between the transformer yellow lead pad and enclosure? (power off)
5. What are your +30VDC and -10VDC readings?

Mike

1: Fuse is definitely in. Double/triple checked.
2: All 3 brackets are secured.
3: DMM is set to DC
4. 0.2 ohms
5. 0.003VDC


Hairball Audio

Re: [BUILD] New FET/RACK Official Help Thread - Please read first post!
« Reply #901 on: November 14, 2017, 07:05:48 PM »
1: Fuse is definitely in. Double/triple checked.
2: All 3 brackets are secured.
3: DMM is set to DC
4. 0.2 ohms
5. 0.003VDC

1. You have 0.003 VDC at your +30 VDC test point AND you -10 VDC test point?
2. You have the unit turned on and plugged in correct? Meaning you have the GR pushbutton selected?
3. What is your AC V between the yellow secondary pad and each orange (give me 2 readings).

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Re: [BUILD] New FET/RACK Official Help Thread - Please read first post!
« Reply #902 on: November 20, 2017, 08:21:27 AM »
Hi Mike.
Here’s what I measured:
TP1: 0.122V
TP15: 2.10V
Brown wire: 6.25V
Output xlr: 6.22V

Is this the Rev D?

Set your compressor controls:

Input: 12 O’Clock
Output: 12 O’Clock
Attack: GR OFF
Release: Full CW
Ratio: 20:1
Meter: GR
Signal: Sine 1kHz @ 0dBu (0.775 VAC across input + and -)

With your DMM measure AC at the following test points using the chassis as you reference (black probe).

TP1
TP15
BRN Wire on Output

Then measure between + and - on the output XLR.

Mike

Re: [BUILD] New FET/RACK Official Help Thread - Please read first post!
« Reply #903 on: November 21, 2017, 03:55:46 PM »
And yes, it’s the D
Hi Mike.
Here’s what I measured:
TP1: 0.122V
TP15: 2.10V
Brown wire: 6.25V
Output xlr: 6.22V

Start by testing without.

test results with Q1 pulled.
input XLR    0.777V
TP1     2.5mV
TP15     139mV
tp17    20mV
brown    nothing?
out     310mV