851

EQ573 Equaliser / Re: EQ573 V1 - 10k Mid Bell Issue

« on: May 05, 2021, 02:49:25 PM »

The necessary connections for the 10kHz are:
P3-center pin to SW4-center pin,
SW4-center pin to SW4-pin#12 (circled yellow)
SW4-pin#12 (circled yellow) to C50/C51-left pin,
C50/C51-right pin to inductor L1-middle pin of a group of 3 in the bottom right corner.

852

CP5176 FET compressor / Re: Resistor R57 burned on setup guide ..

« on: May 05, 2021, 10:17:56 AM »

Try again after removing the DOA.
If back to normal then check the DOA.

853

EQP501 Passive Equalizer / Re: Signal gain increase when engaged

« on: May 05, 2021, 10:14:48 AM »

Is there any possibility that this can be the Film Capacitors?

No.

With the module unplugged, all pots at 0, 

- what resistance do you measure between TP1 and TP3 (?10k)?
- what resistance do you measure between TP1 and 0V (?11k)?
- what resistance do you measure between TP3 and 0V (?1k)?

854

EQ573 Equaliser / Re: EQ573 V1 - 10k Mid Bell Issue

« on: May 05, 2021, 10:01:28 AM »

Continuity between  P3 middle pin and the interior center pin

OK good.

Check the continuity between the center pin and the 10kHz pin (circled yellow).
If there is no then the issue is the switch.

855

MC624 Monitor Controller / Re: Usb remote for MC 624

« on: May 05, 2021, 09:40:15 AM »

Not in the visible future but it is in our todo list!

856

EQ573 Equaliser / Re: EQ573 V1 - 10k Mid Bell Issue

« on: May 03, 2021, 11:15:55 AM »

It could be the rotary switch. You can test it with your DMM. The common contact is a pin situated inside the circle made by the 12 contacts.

857

EQP501 Passive Equalizer / Re: Signal gain increase when engaged

« on: May 03, 2021, 10:22:33 AM »

The issue is in the passive section :
Potentiometers P1...P5, R10, R24, R25.

858

TS500 Tape Simulator / Re: New build test results

« on: May 03, 2021, 10:16:47 AM »

The results are consistent.
Al your values are shifted up by approximately 1V. It could come from your meter.

859

EQP501 Passive Equalizer / Re: Signal gain increase when engaged

« on: April 30, 2021, 03:27:43 PM »

Send a 3VAC sine signal to the input and measure the AC voltage on:
TP1: 2VAC
TP3: 0.17VAC
TP2: 1.7VAC

860

EQP501 Passive Equalizer / Re: Signal gain increase when engaged

« on: April 27, 2021, 09:14:01 AM »

This is not normal. The gain of the unit, when all the pots are at 0 is defined by 
R5, R6, R7, R8, R12, R13, R25.
Check you have the correct resistors in these places.
Also check you didn't swap some pots.

861

EQ573 Equaliser / Re: EQ573 V1 - 10k Mid Bell Issue

« on: April 26, 2021, 11:12:37 AM »

With the frequency switch set to 10kHz, check continuity with your DMM, between P3 center pin and C50 left hole.
If disconnected, the issue may come for a bad solder joint on the connector between boards, 10th pin down as you said, on both PCB's, on C51 and on SW4.
If connected, check you have a connection between the right pins of C51 and C53.

862

LA502 Optical Compressor / Re: Can't get to 1VAC sine

« on: April 26, 2021, 10:56:12 AM »

I am glad you like it.
Congratulations for the successful build!

863

XT500 Lunchbox connector extender / Re: How to solder the EDAC connector to PCB?

« on: April 24, 2021, 08:48:43 AM »

Insert the connector pins in the 2 side rows of holes.
The center row of holes is unused.
Beware, the EDAC connector is mounted at the back of the PCB (opposite 2x13 header).

864

EQ573 Equaliser / Re: EQ573 page not loading

« on: April 23, 2021, 03:48:00 PM »

Thank you for the heads up. Corrected.

865

EQP501 Passive Equalizer / Re: alternative opamps

« on: April 23, 2021, 03:08:16 PM »

on the other I don't get anything (0.L on the DMM).

This one looks damaged. Try replacing it.

866

MP573 Microphone preamplifier / Re: Volume difference between units

« on: April 21, 2021, 06:52:58 PM »

The U1 IC's were mailed on Monday.

867

MP573 Microphone preamplifier / Re: Volume difference between units

« on: April 21, 2021, 04:13:08 PM »

Great job of solving the issue by yourself!

868

EQ573 Equaliser / Re: EQ573 page not loading

« on: April 21, 2021, 08:25:29 AM »

Can you please give me the URL of said page?

869

EQP501 Passive Equalizer / Re: alternative opamps

« on: April 21, 2021, 08:21:49 AM »

What value do you get when measuring R19 in circuit?

870

MP573 Microphone preamplifier / Re: Blown resistor at PCT2 - MP573 version 1

« on: April 21, 2021, 08:19:08 AM »

the resistor is a 22 ohms.
https://www.soundskulptor.com/docs-6.html

871

EQP501 Passive Equalizer / Re: alternative opamps

« on: April 20, 2021, 08:54:03 AM »

Check the value and solder joints of R19. It is 1 ohms in series with the + rail.
Also check that the +16V rail comes through to the module. The issue could also be in the extender.

872

TS500 Tape Simulator / Re: Heavy Overtones/Intermodulation

« on: April 19, 2021, 04:36:57 PM »

TP3 is just after the tape saturation emulator circuit.
What is the level displayed on the meter in your test? It should stay green for minimum distortion.
Can you check the aspect of the sine on TP2. It should be clean, in particular with the TAPE SAT switch set to minus. 
Look for wrong component value or bad solder joints on U2, U3, U4, U5, R11...R25, C6...C22.

873

EQP501 Passive Equalizer / Re: alternative opamps

« on: April 17, 2021, 09:45:02 AM »

Look for a reversed electrolytic, C10, C11, C14, C15 in particular.
Remove U1, the DOA and the front PCB and check the voltage rail again.
Check value of R21, R22, R23, direction of D3 and RLY1.

874

TS500 Tape Simulator / Re: VU meter problem

« on: April 17, 2021, 09:36:43 AM »

Check value and solder joints of R49 and C55. These components define the time constant of the meter.

875

TS500 Tape Simulator / Re: TS500 EQ shape

« on: April 17, 2021, 09:34:18 AM »

Yes good finding.
Check the values of C1 (470pF marked 471), C2 (470pF), C54 (47pF marked 470), C64 (47 pF), C65 (47pF).