DIY progress report

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#2,141
My last guess on this will be that it might be a DAC or I/V stage for DAC since the Pearl 2 is now complete.

I feel like a bloody kid at christmas everytime Nelson announces news about some new project. I don't get that feeling very often these days.
Thanks Nelson
 
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#2,143
Thanks Tea-Bag,
Finally located all that info on your Blog site (problem with living upside down!) - nicely done.

The SJDP120R085 is a depletion JFET like the LU1014, and more available, and can take more voltage and current.
I've had a few people ask me about retrofitting them into an Z9, F3 type clone. Of course I am not knowing the best method here. I think removing the cascode mosfet would be in in order.

Interesting idea - a bit of the "Burning Amp" concept?
 
#2,144
Tea-Bag said:
I thought this was going to be the Nemesis, with an output transformer, but have not seen anymore about it.
Click to expand...

The "Arch Nemesis" project/article was completed for
Jan Didden's Linear Audio magazine at the end of May. This
should be out very shortly.

I'm pretty sure you will enjoy it, as it examines performance
for different transistors, including the depletion mode parts.

😎
 
#2,145
Tea-Bag said:
The SJDP120R085 is a depletion JFET like the LU1014, and more available, and can take more voltage and current.
I've had a few people ask me about retrofitting them into an Z9, F3 type clone. Of course I am not knowing the best method here. I think removing the cascode mosfet would be in in order.
Click to expand...

Probably, but I remember the cascode was used not only for sharing the load but tweaked to actually improve the performance of the amp. Some sort of modulated cascode which I know nothing about.
So even though the cascode probably isn't required, it might still prove beneficial if tweaked in the same manner.
 
#2,148
Hi,

Now I like that idea about a DAC outputstage! More so given the new and old toys in Jfets. As long as it runs on a 300va 2x18V trannie and some capacitance I've got the psu ready...😀

Whatever it is, it will probably be tried.

regards
Joris
 
#2,150
Nelson Pass said:
The "Arch Nemesis" project/article was completed for
Jan Didden's Linear Audio magazine at the end of May. This
should be out very shortly.

I'm pretty sure you will enjoy it, as it examines performance
for different transistors, including the depletion mode parts.
Click to expand...

I often quote myself, as I find it adds spice to my conversation...

Speaking of the devil, Jan's magazine has launched:

Linear Audio | your tech audio resource

😎
 
#2,155
Well, I tried to sign up for Linear Audio, but something about the address (which isn't in standard USA format) won't let me pay. Paypal keeps sending me back "to the merchant". Hopefully one of the bright boys here will figure it out, since it looks really interesting.
 
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