i'm on a roll... the kgsshv

[palchiu]

Beautyful!

[livewire]

Shweeet! Very clean build. <<two thumbs way up!>>

[n_maher]

^{Yeah, very nicely done.}

[JoaMat]

Well done!

[GeorgeP]

Really nice! And tidy looking, actually!

 

 

What switch did you end up going with?

[eggil]

Thank you !

I am waiting for a Bulgin from Mouser, as well as the male XLR chassis mounts from Markertek for the loop outs.

[GeorgeP]

Noticed you didn't have one of the little AMB e24 thingys like you had on your first build - were you doing a Bulgin with or without LED (their LED switches I believe are good for at least 24v)?

[jwzhan]

Very beautiful! Great build!

 

I'm wondering if there is a source for high quality black momentary push button... I've only seen those very cheap chinese ones on chinese trade sites...

[eggil]

This one is a latching switch. No need for the e24.

The frozencpu I currently have gets s tuck in the on position.

The one I ordered is 117-MP0045/1E2BL012 from Mouser.

[GeorgeP]

Does it also need a low voltage connection for the LED or is in done within the switch itself?

[Pars]

Datasheet should be right there on Mouser. Look at it.

[GeorgeP]

I did, thanks. But their "datasheet" is pretty low on information. It seems that the switch itself does up to 250v ac, but the led appears to be offered in two flavours with one being 12v and the other being 220v - but I am just surmising.

 

 

edit: I see now - he is using the 12v dc version.

[headinclouds]

That's a very good looking build eggil. Well done!

[nopants]

If anyone's looking for a cheaper price on peek stuff, there's 

http://www.solidspot.com/shop/

 

They sell some parts in < 100 pieces, etc. I haven't really checked in detail.

Many of these places are located in silicon valley, I'm trying to see if I can just stop by their warehouse and pay for parts haha.

[spritzer]

I've bought from them and they were excellent to deal with. 

[palchiu]

Dear all,

 

I've collected all transistors, and ready to next parts collecting for KGSSHV.

 

I'm newbie with Stax amps my project is use with 007A, should I config with 450V or 500V for better performance?

 

And about CCS, should I use 2SA1968 or IXYS which is better?

 

Needs your kindly advice.

 

Thank you everyone!

 

All The Best,

 

Pal 

[spritzer]

No real performance benefit for using either the 450V or 500V option.  The bias is the same so there is more power at 500V but that's about it. 

 

Same thing for the CCS's, the A1968 is more stable when warming up so less drift but that's about it. 

[palchiu]

Hi spritzer,

 

Thank you so much to solve my doubts! 

 

 

 

 

All The Best,

 

Pal

[s_r]

Got the dissipante in from modushop, now I can start the hard part of the build.

 

[shipsupt]

I like what you did with the front!  Nice.

[nopants]

Got the dissipante in from modushop, now I can start the hard part of the build.

 

P1070107.JPG

 

How long did it take to reach you from Italy? I think it's been like 2 weeks since my case has been in the states according to their tracking...

[s_r]

They shipped it out on thursday and I got it tuesday morning, so pretty quick. Then again it arrived in canada on friday, so most of the shipping time was spent between customs and me.

[s_r]

So after powering on the PSU board the first time (450V version) I get +459, -459, +15, -15, and +569 for the bias before the 4.7m resistor. Is 9V over on the HV rails anything to worry about?

 

 

[jwzhan]

As long as it's stable and nothing blows up, it should be fine. The difference might be caused by resistors in the ladder or the zeners not being precise.

[GeorgeP]

So after powering on the PSU board the first time (450V version) I get +459, -459, +15, -15, and +569 for the bias before the 4.7m resistor. Is 9V over on the HV rails anything to worry about?

When you measured the bias before the 4.7M, did you let it warm up for a while? I found the bias to creep up a bit after 5-10 min and then sit solidly at ~ 580 (580.2 in my case). Can't speak to your + and - . Mine are at 504.0 and 504.3 and they seem to be fine.