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

[jjs]

Now I don't know lol. Both you guys were part of the team. Is the voltage 0 at c9 or Rail voltage?

Under normal operation C9 won't have any DC across it. It's only during fault conditions, like if the outputs are stuck to one of the rails C9 will see the full rail voltage. So technically the voltage rating of the cap should be the same as the rail voltage or higher. Or just use a lower voltage cap and replace it if that scenario happens. Or put anti parallel diodes across the cap to protect it from excessive voltage. On power up there might be a little voltage across C9 until the circuit stabilizes.

Jeremy

 

[fireanimal]

10-4 play it safe with 63v!

 

[Johno]

Now I don't know lol. Both you guys were part of the team. Is the voltage 0 at c9 or Rail voltage?

Look at the circuit diagram

 

[Theodosis O.]

Try and get some KSC3503E for the pre-driver. There are a few of use on the team that have them. If you ask her publicly someone may send you a pm offering to send you some. I don't want to mention names as they may not want to be bombarded with lots of pm's.

Thanks Stuart,

Only the Q105 and Q106 must be matched?
what about the other KSC3503/KSA1381 ?

 

[stuartmp]

Thanks Stuart,

Only the Q105 and Q106 must be matched?
what about the other KSC3503/KSA1381 ?

Yes only Q105 / Q106 should be matched. A close match is also good. Better that a D & E combination. The other KSC3503/KSA1381 on the boards don't need to be matched but if you can get your hands on KSC3503E use them.

 

[asuslover]

I have Sanyo datasheets for those devices, do not believe Toshiba made them, also notice the exposed pad where as the ksa,ksc versions have a thicker bodies and are isolated

The shipping bag .

 

[ItsAllInMyHead]

^ I'm assuming you're posting this b/c of your post #1957 => your link to sell parts. If not, please ignore.

Pics of your parts being offered along with a data sheet matching the form factor and parts markings would be very helpful along with provenance.

No disrespect meant, but in the days of so easily re-etching / screen printing parts markings themselves... a printed parts bag label as evidence of parts authenticity does not pass muster (for me).

Documented provenance from origin and/or spec sheets and measurements are what counts (to me).

 

[nfsgame]

Anything speaking against using 3503E/1381E as pre-drivers, 4883A/1859A as drivers and 3263Y/1294Y as outputs (4 pair) using 57V-Rails and 4 Ohms load? I've some great hfe-matching 4883/1859 in my stash. As well as some tightly N/P-matching C3423/A1360. Is it possible to use them in the VAS? Or should the specified KSC/KSA semis be used?
Why were 680u caps chosen as the local decoupling? I've seen some "High-End"-amps using some 22-100u at this point. Is it about the ripple aviability? Would it hurt going lower cause saying I have some 330u in my stash?

 

[jjs]

Anything speaking against using 3503E/1381E as pre-drivers, 4883A/1859A as drivers and 3263Y/1294Y as outputs (4 pair) using 57V-Rails and 4 Ohms load? I've some great hfe-matching 4883/1859 in my stash. As well as some tightly N/P-matching C3423/A1360. Is it possible to use them in the VAS? Or should the specified KSC/KSA semis be used?
Why were 680u caps chosen as the local decoupling? I've seen some "High-End"-amps using some 22-100u at this point. Is it about the ripple aviability? Would it hurt going lower cause saying I have some 330u in my stash?

For your selection of transistors and rail voltage, everything is good. Definitely use the Sanken Y grade outputs with those drivers. As far as the C3423/A1360 I haven't used those but after looking at the datasheet they should be acceptable.

Regarding the local decoupling cap the 680uF value is not super critical it's more the ripple current rating.

Jeremy

 

[asuslover]

^ I'm assuming you're posting this b/c of your post #1957 => your link to sell parts. If not, please ignore.

Pics of your parts being offered along with a data sheet matching the form factor and parts markings would be very helpful along with provenance.

No disrespect meant, but in the days of so easily re-etching / screen printing parts markings themselves... a printed parts bag label as evidence of parts authenticity does not pass muster (for me).

Documented provenance from origin and/or spec sheets and measurements are what counts (to me).

I agree with your concern. Just wanted to show the Onsemi logo printed on the bag. These are Not toshiba or Sanyo.

 

[Harry3]

I think it's best that questions regarding components etc should be posted in the build thread and not scattered over various threads.
https://www.diyaudio.com/community/...erine-build-thread.385920/page-7#post-7029955

 

[miran50]

Do you think it is possible to connect a 100k potentiometer to the IPS input, or is it necessary to use a 10k potentiometer ??

 

[danieljw]

New video is up:

enjoy

- Dan

 

[thompsontechs]

Wow, nice work Dan.

 

[aatallah]

Are there boards for sale (or the plans to get boards made at a jlpcb or others)? I was about to put an order for a Badger set of PCBs when I saw this new project, and I'd love to give it a go

Thank you!!!!

 

[danieljw]

Are there boards for sale (or the plans to get boards made at a jlpcb or others)? I was about to put an order for a Badger set of PCBs when I saw this new project, and I'd love to give it a go

Thank you!!!!

There is a link to the Poll for another group buy of PCBs at the end of the video - hope this helps

- Dan

 

[asuslover]

Just curious what happened with ostripper.
I really hope he is alright.​

 

[stuartmp]

Just curious what happened with ostripper.​

I really hope he is alright.​

We... The Wolverine build team would also like to know how OS is as well, but we haven't heard from him since his last post over a year ago now.
I have sent him pm's and I have his personal email address.
I have received no response from either.

 

[ghitus]

We... The Wolverine build team would also like to know how OS is as well, but we haven't heard from him since his last post over a year ago now.
I have sent him pm's and I have his personal email address.
I have received no response from either.

Does someone of us know where he actually lives now? I remember that just a little before he stopped posting, he said that he was busy with a move from one place to another... Can someone of you US guys reach him somehow or speak to people who know him directly?

 

[danieljw]

Hi All,

New video is up !

This video has the announcement for the winner of the Pair of Green Wolverine PCBs

And sine wave testing up to clipping of the Wolverine with ±57Vdc rails at full power into 8Ohm, 4Ohm and 2 Ohm loads.

Enjoy !