Sound Skulptor forums

Build help and troubleshooting => MU524 Vari-Mu Tube Compressor => Topic started by: AcdNrg on March 25, 2025, 01:11:30 PM

Title: Q4 orientation
Post by: AcdNrg on March 25, 2025, 01:11:30 PM

I did two nightly builds, against all best practices 8). 

Now it´s the morning after and the visual inspection is giving me second thoughts: I´m not so clear about Q4 orientation (the assembly guide pics are not super helpful). Now that I reread the description, I´m not sure whether the PCB marking points out the back of the MOSFET (longest edge) or if it refers to the canted edge (like it´s the case for the BR1 diode bridge orientation). 

This is what I did, please tell me it is the correct orientation. If I need to correct things, I´d rather do so before powering up for setup/calibration :D

(https://i.imgur.com/zGAYxXS.png)


Thanks in advance!

Title: Re: Q4 orientation
Post by: JPK on March 26, 2025, 08:54:10 AM

Yes Q4 orientation is correct in your picture. Actually the double line represents the metal tab which is usually at the back of TO220 transistors. In the current version of this transistor, the metal tab is now made of plastic.

Title: Re: Q4 orientation
Post by: AcdNrg on March 26, 2025, 09:51:39 AM

Thank you!

It´s those little things that can throw you off track if you´re self-taught. Or still self-teaching :). Learned something today, will now proceed to setup and calibration.


Many thanks!