[BUILd] PM660 / PM670 SCAmp Booster build and tips help thread

Help Support GroupDIY:

prescott

Well-known member
Joined
Apr 15, 2009
Messages
136
Hello!

I've just inserted the SCAB and I like it a lot.
My only problem:

How can I have slower attack time? (5ms, 10ms, 30ms)
I'd like to have slower attack even with fast release if it is possible...

Thanks!
 

duantro

Well-known member
Joined
Dec 31, 2008
Messages
743
Location
KCMO USA
prescott said:
Hello!

I've just inserted the SCAB and I like it a lot.
My only problem:

How can I have slower attack time? (5ms, 10ms, 30ms)
I'd like to have slower attack even with fast release if it is possible...

Thanks!
Probably should have posted this in the pm660 thread, but the way I understand it is smaller capacitors in the time constant section = quicker attack times. Experiment here for taste.
 

ojiban

New member
Joined
Jan 26, 2015
Messages
1
Hi diyer's

First of all thanks for this threat...
I'm starding my build of the pm670 with scamp, i hope, soon.
Now is my question: is it smart to build thisone with te germanium resistors? I know it will influence the sound.

Thanks in advance.
Gr ojiban
 

crisotop

Well-known member
Joined
Feb 22, 2007
Messages
709
Location
Linz / Austria
I've just started working on my PM670 after a long break and having troubles adjusting RV*01 to 0V. I'm using 5k trimmer, might that be a problem? If I'm reading the schematic correctly that shouldn't really be an issue...

thanks in advance,
Christoph
 

duantro

Well-known member
Joined
Dec 31, 2008
Messages
743
Location
KCMO USA
I'm finally getting around  to try to implement Kingston's Psu mod from the m670 thread, and was wondering if anyone had thoughts on if the scamp board would run happily at 12.6v? I know the ne5534's look to be within range here, not sure about the tip41/42's and thought I'd check if there were any thoughts on implementing this in the m670 mod.
Link for M670 info: https://groupdiy.com/index.php?topic=51478.0

Edit: no response, so I decided to keep the existing +-17v supply in there also.
 

Attachments

  • M670-PSU-Kingston.png
    M670-PSU-Kingston.png
    50.8 KB · Views: 31

Latest posts

Top