So tickled I am by ALF's little amp build, that I'm really seriously considering building one of these. Looking at the component count and ease of construction....how could I not!
ALF, forgive me if I got it wrong, but it seems its not a Pass amp per se', but rather an original design by Mark Houston on DIY Audio Projects, inspired by the ZEN amps.
Link to the original build:
http://diyaudioprojects.com/Solid/ZCA/ZCA.htm
My prelim costing for this project, including all but case work (box, switches, knobs, connectors, heatsink) but incl a 160VA 18V toroid (which is not available from RS at the moment but will only be next year early) this project will come out under R500*. Of which more than half is the transformer. Seeing as I already have a lot of the components, incl the heatsink and much of the psu parts, its a no brainer for me really.
Anyway, I'd be MUCH obliged if some of the more experienced members can chip in with some help and explanations of the circuit. :notworthy: I've built a kidNAP (which is working very well), but the circuit was a bit much for me to figure out to the point where I understand fully. This however, I'm sure I can get to grips with.
So first off, a question with regards to the variable resistors listed:
For the 47k, I assume a 100K dual potentiometer of just about any power rating will work fine? I understand its essentially the volume control.
The 100K one though...will that be seeing a lot of heat/current? I cannot quite figure out why I can't use one of those flat pcb mounted jobbies that I used for the kidNAP. This set-up seems to be something that is intended to be adjusted often. Can't be right? Right?
Thanks in advance for your help.
*I looked at decent enough parts - Rubycon/Panasonic and one Jimson cap and all mounted on breadboards. That costing is of course not applicable to Spuds.
oint:
ALF said:hi there
this is the testing of my Nelson Pass single ended class A 4watt amp for my Fostek horns, and they sound very very good. Andre you must listen to this solid state amp on horns , with a hand full of parts Stacey Kent spit in your face if you reach 3 watts. i hope the picture works
juan
stellenbosch
ALF, forgive me if I got it wrong, but it seems its not a Pass amp per se', but rather an original design by Mark Houston on DIY Audio Projects, inspired by the ZEN amps.
Link to the original build:
http://diyaudioprojects.com/Solid/ZCA/ZCA.htm
My prelim costing for this project, including all but case work (box, switches, knobs, connectors, heatsink) but incl a 160VA 18V toroid (which is not available from RS at the moment but will only be next year early) this project will come out under R500*. Of which more than half is the transformer. Seeing as I already have a lot of the components, incl the heatsink and much of the psu parts, its a no brainer for me really.
Anyway, I'd be MUCH obliged if some of the more experienced members can chip in with some help and explanations of the circuit. :notworthy: I've built a kidNAP (which is working very well), but the circuit was a bit much for me to figure out to the point where I understand fully. This however, I'm sure I can get to grips with.
So first off, a question with regards to the variable resistors listed:
For the 47k, I assume a 100K dual potentiometer of just about any power rating will work fine? I understand its essentially the volume control.
The 100K one though...will that be seeing a lot of heat/current? I cannot quite figure out why I can't use one of those flat pcb mounted jobbies that I used for the kidNAP. This set-up seems to be something that is intended to be adjusted often. Can't be right? Right?
Thanks in advance for your help.
*I looked at decent enough parts - Rubycon/Panasonic and one Jimson cap and all mounted on breadboards. That costing is of course not applicable to Spuds.
oint:
