Hello DIY'ers.
I have been given a Yamaha P2200 that is completely broken and not worth repairing - particulary so as the whole left channel has been removed. The best path forward is to try and reuse the chassis and toroid etc to build a whole new amp.
The power supply consists of a couple of 100v 22,000uf cans and I'll be replacing that fully. No problem there.
The rail voltages are very high though @ +/- 80VDC and I'm wondering whether anyone has some recommendations on suitable amp modules for this. I did read a very old thread in here about repowering a P2200 with Aussie Amplifier modules and while this is an option, it's a very expensive one.
So, does anyone have some thoughts on what I can possibly use or consider?
Cheers
I have been given a Yamaha P2200 that is completely broken and not worth repairing - particulary so as the whole left channel has been removed. The best path forward is to try and reuse the chassis and toroid etc to build a whole new amp.
The power supply consists of a couple of 100v 22,000uf cans and I'll be replacing that fully. No problem there.
The rail voltages are very high though @ +/- 80VDC and I'm wondering whether anyone has some recommendations on suitable amp modules for this. I did read a very old thread in here about repowering a P2200 with Aussie Amplifier modules and while this is an option, it's a very expensive one.
So, does anyone have some thoughts on what I can possibly use or consider?
Cheers
It’s both a electrical and a mechanical problem to solve. Can’t say I’ve seen old pcbs for sale for that model. It’s a lot of work to design a new pcb especially if it’s a one of. It’s been
awhile since I’ve been into one of them.
awhile since I’ve been into one of them.
Thanks, but I'm not looking to rebuild the existing amp back into a P2200. I'm looking to completely re-power it with different amp modules. My question is whether anyone knows of suitable modules might already be available somewhere and off the shelf so to speak..
Lots of designs and modules available on diyaudio, rod elliot sound, etc, look around.
Biggest issue is fitting them into the chassis, that's the "suitablity" factor, not like you are going to find anything to fit an existing hole pattern.
Biggest issue is fitting them into the chassis, that's the "suitablity" factor, not like you are going to find anything to fit an existing hole pattern.
Consider the cost of powered amp modules (e.g. Icepower) or replacement SMPS supply vs cost of repurposing the existing toroid.
It all depends on how much you want to spend and what power you need (or want).
It all depends on how much you want to spend and what power you need (or want).
A lot of MOSFET amplifiers tend to have higher supply voltages, so it may be worth looking at those rather than bipolar-based amps.
See if there are sellers of EBB modules on Ebay in Australia.
I have used these modules a bunch of times and never had any negative feedback, they are based on Maplin modules.
https://www.ebay.fr/itm/361473254497
I have used these modules a bunch of times and never had any negative feedback, they are based on Maplin modules.
https://www.ebay.fr/itm/361473254497
I use LJM boards in Denon 70 volt chassis. I dont know if they or some other of his board accepts 80 volt
Cheers!
Cheers!
I used a pair of these: https://www.ebay.ca/itm/393988921680 in BTL with 70V rails. There are 40 100uf/80V on board that would need to be replaced. The output devices are IRFP 240/9240 that stood up well. E