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Posted

Thank you !

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

Posted

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)?

Posted

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...

Posted

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.

Posted

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.

Posted

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.

Posted

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 

Posted

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. 

Posted

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

 

attachicon.gifP1070107.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...

Posted

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.

Posted

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?

 

 

Posted

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.

Posted

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.

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