Krell KSA-250

[krellmk]

Check this out Perry

Soft-Start Circuit For Power Amps

https://sound-au.com/project39.htm

 

[krellmk]

Always a problem with the soft start with the Krells

 

[Gepetto]

Always a problem with the soft start with the Krells

It's always the simple things in life that get farged up...

 

[WOPL Sniffer]

Check this out Perry

Soft-Start Circuit For Power Amps

https://sound-au.com/project39.htm

Too funny...... The krell will eat that thing up. There is a little more to the "Slow Start" circuitry than a chinee Soft Start.

 

[krellmk]

This is some Australian guy

 

[WOPL Sniffer]

Check this out Perry

Soft-Start Circuit For Power Amps

https://sound-au.com/project39.htm

I had to laugh when I read these Aussies building this project.

Special Warning
In case you missed this the first time: In the event of an amplifier fault at power-on, the fuse may not blow (or at least, may not blow quickly enough to prevent damage) with this circuit installed, since there may be no power to operate the relay.

WTF?????

 

[Gepetto]

I had to laugh when I read these Aussies building this project.

Special Warning
In case you missed this the first time: In the event of an amplifier fault at power-on, the fuse may not blow (or at least, may not blow quickly enough to prevent damage) with this circuit installed, since there may be no power to operate the relay.

WTF?????

They would not have written that warning if they had not experienced that failure already. Experience speaking...

 

[VSAT88]

We have been moving the resistors to the other side of the board when replacing them. Stand off is also done.

I found the pic on the net with how dude re located them. Mine are going on the back of the board. I think.

 

[VSAT88]

Too funny...... The krell will eat that thing up. There is a little more to the "Slow Start" circuitry than a chinee Soft Start.

Yep, it would be a for real slow start with that deal...

 

[VSAT88]

It would seem that they like me (GO FIGURE). They sent me an email with a bunch of attachments.

Give them time... LOL

 

[WOPL Sniffer]

After $1000 worth of parts on the Credit Card, I hope the finish date aint too far off. I was going to milk this for the next 10 months but I can't handle unfinished stuff in my shop, sitting around gathering dust... Bugs me.

YUP, MILKED THE HELL OUTTA THIS DIDN"T I????

 

[WOPL Sniffer]

This white lightning
https://www.leafly.com/strains/white-lightning
https://www.allbud.com/marijuana-strains/hybrid/white-lightning

That was a great Idea you had.

 

[VSAT88]

I wonder if the 250 and the 150 share the same "Slow Start" board??? I'll have to dig into that. Maybe I'll try to make a new board. It's a pain with a shitty skizmo especially if there were a couple different versions and only ONE skizmo. I could simplify it and beef it up and eliminate some of the voltage switches and use a beefier relay.

I noticed this on my SS 150 board. This is also on one of your pics.

 

[WOPL Sniffer]

Perry you keeping this brute when done my friend in Florida had to run a extension made up of some fuckin welding cable from the breaker box.

I saw a pic today of a dude with 2 Krell Mono's and they were sharing a duplex outlet. Crazy

 

[WOPL Sniffer]

I noticed this on my SS 150 board. This is also on one of your pics.

View attachment 64375

Is it the same rev? It shows the rev right below that

 

[VSAT88]

Shit manual I read said must have a dedicated 20A for the KSA 250. Highly recommended for the KSA 150. I got mine on a dedicated 20A serv.

 

[VSAT88]

Is it the same rev? It shows the rev right below that

I don't have any pics of when I looked inside mine. That was one of your pics from this thread. Mine said the same on it though. I am pretty sure my 150 has that same board.

 

[WOPL Sniffer]

We need an Engineer to redo the skizmo with modern shit.

 

[WOPL Sniffer]

Shit manual I read said must have a dedicated 20A for the KSA 250. Highly recommended for the KSA 150. I got mine on a dedicated 20A serv.

They say the idle current is a constant 8-10 amps...... Start up is the tough part.

 

[VSAT88]

I was hoping you would decide to sink a fang into doing that..... I can say a lot about a lot of equipment I have run across but that KSA Krell amplifier is something of a work of art the way its put together , looks and sounds. They just look bad ass as a mother and that one of yours is gonna last a damn good long time now that you are done with it.