Thoughts on the velleman K8060?

Boscoe · 1st January 2011, 09:46 PM

Just wondered what people thought of this amp, I have built on once but broke it and never got to listen to it. They are cheap and are good quality but are they that good?

Velleman nv

I belive this is the schematic:

Boscoe

ostripper · 2nd January 2011, 12:15 AM

Not really , no current sources , low PSRR. Darlington OPS shunted by 680pF ... questionable stability. A similar amp with a current source and a true 2 stage emitter follower output scheme would be miles ahead in durability and sound quality. (below) is a similar but much more refined amp , it's sonics would overwhelm the velleman by a VERY wide margin at the cost of 3-4 more devices (cheap). The Velleman is more of a "student" amp , not really Hi-Fi

.

OS

jaycee · 2nd January 2011, 09:31 AM

It's a typical low cost kit amp, using cheap darlington outputs. It'll work - thats about the best you can say about it.

Tekko · 2nd January 2011, 10:40 AM

It's about the same circuit as a circuit from an 80's elektor catalogue.

meanman1964 · 2nd January 2011, 11:51 AM

read this problem: project vellman!!

jaycee · 2nd January 2011, 11:59 AM

The person in that thread was trying to run the amp from higher supply voltages. on 35V supplies (using a 2x25v transformer) this circuit is OK - this is typical supply voltage, while Velleman show 40V supplies this would be the unloaded voltage, and will soon sag under load.

1st January 2011, 09:46 PM	#1
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	Thoughts on the velleman K8060? Just wondered what people thought of this amp, I have built on once but broke it and never got to listen to it. They are cheap and are good quality but are they that good? Velleman nv I belive this is the schematic: Boscoe __________________ I thought about it once, but then thought again.

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2nd January 2011, 09:31 AM	#3
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	It's a typical low cost kit amp, using cheap darlington outputs. It'll work - thats about the best you can say about it.

2nd January 2011, 10:40 AM	#4
Tekko diyAudio Member Join Date: Jan 2005	It's about the same circuit as a circuit from an 80's elektor catalogue.

2nd January 2011, 11:51 AM	#5
meanman1964 diyAudio Member Join Date: Oct 2006 Location: Belgium the land of chocolate	read this problem: project vellman!!

2nd January 2011, 11:59 AM	#6
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	The person in that thread was trying to run the amp from higher supply voltages. on 35V supplies (using a 2x25v transformer) this circuit is OK - this is typical supply voltage, while Velleman show 40V supplies this would be the unloaded voltage, and will soon sag under load.

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