I was going to go down the NCC200 route, why should I go this way rather than with Avondale?
I hope Carl says no. I would be embarassed to ask this of him.Will you be testing the board for stability and optimal compensation Carl? Thanks.
Carl
What's the VBE configuration. Can you post a schematic ?
midcm1 said:BTW I think there are several areas on the layout where the gaps could be widened. Part of Les's version (upgrade ?) was an optimal board layout.
midcm1 said:Also I hope everyone is aware they are going to have to come up with a new power transistor mounting/heatsink arrangement.......and these won't be an easy plug and play in existing Naim amps anyway.
midcm1 said:Also Ceds PA design has several features that could be incorporated.....
midcom1 said:Sorry Carl if I'm pissing on your parade....but I've been down some of this road already (as you know).
Can I have a little bag of the magic pixie dust you mention? Also will it give me a better sound without soldering? ;-)
Will you be testing the board for stability and optimal compensation Carl? Thanks.
I hope Carl says no. I would be embarassed to ask this of him.
Here's why..
Carl is trying out this idea.
He is offering us boards to join him in trying this idea.
We think it should work after all it is based on the proven ncc cct.
At 5 bucks a pop, I don't feel I am paying enough to ask for a fully developed and tested board. Just a ticket to join the ride and see where this leads.
I'll take 4 boards.
Many thanks
Ronald
PS:
whats about a multi fed regulation?:
http://www.pinkfishmedia.net/forum/showpost.php?p=310314&postcount=253
http://www.pinkfishmedia.net/forum/showpost.php?p=310797&postcount=257
Nope. I'll be testing it to make sure that it works for me. In fact this board is exactly my current configuration, just not all on one PCB.
Anything else is left as an exercise for the buyer. I will be ordering a few samples for test purposes before committing a bunch of people's money, but basically you're on your own with no guarantees other than "you will receive the boards you pay for".
If you're not comfortable with this, I understand completely and anyone is free to retract their interest with no hard feelings. These boards are for fun and experimentation! If you want a stable, known-good design then I suggest buying NCC200s from Avondale.
We think it should work after all it is based on the proven ncc cct.
Nope. I'll be testing it to make sure that it works for me. In fact this board is exactly my current configuration, just not all on one PCB.
Anything else is left as an exercise for the buyer. I will be ordering a few samples for test purposes before committing a bunch of people's money, but basically you're on your own with no guarantees other than "you will receive the boards you pay for".
If you're not comfortable with this, I understand completely and anyone is free to retract their interest with no hard feelings. These boards are for fun and experimentation! If you want a stable, known-good design then I suggest buying NCC200s from Avondale.
This may be an impossible question to answer but here it is: what level of technical expertise should we have and what sort of test equipment should we have access to to make a reasonable go at this project?
If there is a BOM to tell me what part to put where, I can do that (usually). And I can solder. I can also measure DC at the output, adjust voltage across emitter resistors (at least on a NAP). But anything beyond that, things get more then a little fuzzy for me. Am I getting in over my head with this thing?
Carl
I presume from your PCB diagram that TR9 and TR10 are the power output transistors. In which case would Sanken 2SA1216 (PNP) and 2SC2922 (NPN) MT200 type be suitable. It just happens that I have a set that I salvaged from an old Audiolab amp. I was wondering if I would ever get to use them. This would be ideal.