Zeny based on Nelson Pass cascode design

[adolphe]

That's a good point about the heatsink being too small santi. I've changed to pcb to mount the transistor upright, and at the edge, so you can use whatever size heatsink you want. I'm also going to redo the connectors. I'll upload new images when I have that done.

-Scott

 

[Zen Mod]

Babo
why your www looks good only with IE......with Firefox-it's a mess with narrow frames......

 

[adolphe]

Cleaned a couple things up in the pcb. Moved the FET on the PSU so that pretty much any heatsink could be used. I a spot for the CL-60 thermistor right on the mono channel, and a connector for a chasis connection. Added some better labels.

Thoughts?

-Scott

 

[adolphe]

The psu...

 

[Babowana]

why your www looks good only with IE......with Firefox-it's a mess with narrow frames......

ZenMod,

Thanks for the kind feedback and showing your interest in my WWW .
I know about home page only to the short extent after having done self-study through a small handbook. I am really an amateur in this field, and even I didn’t know what are the IE and Firefox. This morning, I had a brief chat on the coffee table with one of our IT-facilitators, and felt myself that I designed my WWW pinned to IE (Internet Explorer). He informed me that some people prefer Firefox while IE is more popular.

I need time to understand what differences in different web browsers are. Then, I will try to re-new my WWW properly for all . . .

Regards,

 

[Zen Mod]

Ze............

 

[Babowana]

Thoughts?

-Scott

For example, I prefer this way of ground path.

 

[adolphe]

Ah...I suppose that makes sense. Would it just be better to combine the psu and mono boards into one so that they share the same ground plane? Or just move the input, output and chassis ground to the PSU board?

-Scott

 

[Babowana]

Or just move the input, output and chassis ground to the PSU board?

-Scott

Mine is in this way successfully.

We need to invite other grounding experiences too . . .

 

[adolphe]

JH, what size transformer did you use? Also, is one PSU board capable of driving two channels? Or does it have to be a dual mono design?

-Scott

 

[Babowana]

One PSU covers both channels.
I have used two different sizes of transformers: 30VA and 50VA.
30VA is big enough. 50VA is a luxury.

 

[Kaliban]

Is it possible to set it up for my Sennheiser 650.
Iam listening to my very old Superex TL3 and they sound a lot better .

 

[Babowana]

Is it possible to set it up for my Sennheiser 650.

One of my cans is Sennheiser 600.
I also tested 650 at the shop with Zeny.
The owner of the shop wanted see inside Zeny ^^~
For these cans, I recommend the size of the
output resistor (behind the output coupling cap)
less than 30 ohms.