Of course the debate will continue forever, and I certainly don't want to waste my energy continuing with it 🙂
Lately I have been experimenting with HQ PS stuff, and the results have been very positive for me. Wouldn't mind trying it with a ba$tard Klone is all (someday).
Lately I have been experimenting with HQ PS stuff, and the results have been very positive for me. Wouldn't mind trying it with a ba$tard Klone is all (someday).
I'm looking for TO3 mounting brackets, I can't find anything with google and the store doesn't sell them any more, can anyone recommend where to look?
Hi you can buy some angle like this on ebay (item 271309382932) cut it to size and use a TO3 gasket to mark out drill holes.
Repute mentioned 2 weeks ago that he still has all his parts for a ksa-50 clone so I told him I would build it for him.
It has been a while since I was excited to build an amp... Hopefully I can do it over the winter while I don't have outside work to do on the house.
It has been a while since I was excited to build an amp... Hopefully I can do it over the winter while I don't have outside work to do on the house.
Thanks Dave, my metal working isn't brilliant, so that will be a last resort but using copper bar instead.
Thank you THD+N, the link takes me to a TO3 socket, could be usefull as a drilling template.
Thank you THD+N, the link takes me to a TO3 socket, could be usefull as a drilling template.
Troy
Am close enough now to you that if you need help building it then I can help out if need be.
Mark
Am close enough now to you that if you need help building it then I can help out if need be.
Mark
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Hi, I built a Krell clone several years ago, it is still in use today.
I used Delta Audio boards that were modified to run on +-25V rails.
Duel mono construction throughout with separate supplies for the front end, triple plastic output stage.
I chose lower voltage rails to make heat dissipation more manageable with passive heat sinks. Even so with 1.6A bias the sinks still run quite hot ( about 50C ) Sinks measure 400 x 130 x 40 mm, dissipating about 70W per channel .
Heat management is the biggest problem when building class A.
Best Regards
Alan
I used Delta Audio boards that were modified to run on +-25V rails.
Duel mono construction throughout with separate supplies for the front end, triple plastic output stage.
I chose lower voltage rails to make heat dissipation more manageable with passive heat sinks. Even so with 1.6A bias the sinks still run quite hot ( about 50C ) Sinks measure 400 x 130 x 40 mm, dissipating about 70W per channel .
Heat management is the biggest problem when building class A.
Best Regards
Alan
Attachments
Thats a really nice looking amp well done.
I am planning on using 2 x 32v 500va transformer for 2 mono blocks should give me 48v DC.
Hi, question please, I am confused as to whether the Delta / Pink Mouse boards are the Mk1 or Mk2 version of the KSA50 ? Does the Mk2 version have the mosfet CCS ? I have seen KSA50 pcb's on the internet that state they are Mk2 and they have the fet CCS. So as I said I'm confused. Can someone clarify this for me?
Best Regards
Alan
Best Regards
Alan
Thanks for the reply Pink, I understand that your boards do not use fets ( same as Delta), but are they the Mk1 or Mk2 KSA50? Seems to be a difference of opinion regarding versions when searching on the internet.
Best Regards
Alan
Best Regards
Alan
Frankly, I'm not sure. The schematics we worked from were a tad ambiguous. However I wouldn't worry too much about it, it's a great sounding amp and a fun build project whatever version it comes from.
Thanks Pink, yes it was a good project to build and certainly sounds good, still in use today. I built mine as a 25w version so I could use passive cooling. Now I've got an itch to build a higher output class A, and I don't know whether to build another Krell clone , or is there anything appreciably better?
Best Regards
Alan
Best Regards
Alan
Alan, I've been out of circulation over the past few years as I had to move to a really small flat so haven't been diy-ing, so I'm not really up on what's hot at the moment, (sorry for the pun! 😀). However I should be exchanging on a house tomorrow, so once I get set up there, and all the stuff unpacked from cardboard boxes then I'll be a bit more active again.
But I would say try the Symasym if you want a fun little AB project, I'm currently running a two way active system with them and they're a great little amp, and once I get into the new house then I might well build more for a three or four way. The klone needs a rebuild as it got damaged in the last move, but it will get one as it's too good to waste, and works particularly well with SY's valve pre.
Harry, our versions were probably closer to the II than the I, both were 50w types
But I would say try the Symasym if you want a fun little AB project, I'm currently running a two way active system with them and they're a great little amp, and once I get into the new house then I might well build more for a three or four way. The klone needs a rebuild as it got damaged in the last move, but it will get one as it's too good to waste, and works particularly well with SY's valve pre.
Harry, our versions were probably closer to the II than the I, both were 50w types