DIYA store "Wolverine" (Son of Badger) .... suggestions ??

[ostripper]

Ohh , that's a "slewmaster" .. with my favorite Sanken's. Cool !

 

[ostripper]

I propose The ''Marten" since we seems to like Mustelidae family 😉

Baby martin ... yeah.

 

[jjs]

That's not the Slewmaster. This is complpetely new. Designed this past year.

Jeremy

 

[ostripper]

Just think , all that copper and caps in JJS's slewmaster could be replaced with this ...

 

[ostripper]

That's not the Slewmaster. This is complpetely new. Designed this past year.

Jeremy

Looks like one. same style.

 

[jjs]

Yes, it does have a similar layout. That's what I settled on to maximize heatsink usage...

Jeremy

 

[ostripper]

what do you power with it. big heavy drivers ?

 

[jjs]

Just think , all that copper and caps in JJS's slewmaster could be replaced with this ...

I'd probably pick from one of these for switching power supply.

https://www.hypex.nl/product/smps1200a700/137
or
https://micro-audio.com/store/product/cobra-s2/

 

[jjs]

what do you power with it. big heavy drivers ?

NJW0281/0302 biased at 60mA

 

[ostripper]

I meant speakers

 

[Harry3]

Dadod offered a CFA some time back:
https://www.diyaudio.com/community/...son-of-badger-suggestions.369758/post-6655230

 

[ostripper]

1ppm , no TMC ??

 

[ostripper]

servo is isolated from the diamond input stage. Built this one in slewmaster form. worked nice. crystal HF presence.
200V/us or better.

 

[Johno]

I propose The ''Marten" since we seems to like Mustelidae family 😉

A weasel like animal - no thanks!

 

[neilshop]

I meant speakers

Hi, OS...
You might recall about 3 years ago that I asked you what you thought of my using the Honey Badger with 4 ohm nominal loads. The speakers are Infinity RS2.5, which are a relatively difficult load. Your response was essentially "absolutely no"... You recommended that I move on to the Wolverine project, which was in the design phase. The result of that discussion is a quad Wolverine, which I listen to every day. I've been beating on it for close to 2 years now and it never disappoints. This led to JJS and I to explore some further "amp porn" as you say, and the 6-pair/8-pair beast was born. We're not done... more "porn" to come.

 

[OnAudio]

Welcome back Ostripper. Glad to hear your ok. Creativity spikes birth multiple designs keep it up.

 

[ostripper]

I'd probably pick from one of these for switching power supply.

https://www.hypex.nl/product/smps1200a700/137
or
https://micro-audio.com/store/product/cobra-s2/

If you can't wait ... go for it. In fact , I would like to look at the hypex for inspiration. But , in the end MY SMPS will be the best. AND , everybody will

get to play with mini toroids and baby EI cores (DIY rules) !!! We will get anal over the finer points of the circuit and make the cleanest quietest one to be had.

PS - Hypex is Rubycon capped 3X low esr at each output ... looks like the full bridge self resonant standard issue. Adressable , as well. NICE !!

 

[OnAudio]

However note that many people make a mistake related to the first rectifier in switch mode power supplies by outfitting it with an embarrassingly small filter capacitor, don't do this! Use 3900uF

 

[ostripper]

Size is good , but 3-4 in parallel is more important (ESR) 4 X 2200uf Nichicon "HD" tailored HF ESR. The right part for the job.
My big 20A 5V LED supply has 3 @ 3300u/16V "HD's". I recap those cheap asian supplies. No Kendu caps allowed . 😉

 

[OnAudio]

Even big caps have good PSU high frequency response. You can use 3900uF 400V for first rectifier and then your 4*2200uF for second rectifier at your rated target voltage or even 2*4700uF as used in the beloved crown amplifier