SONY VFET
It is a non profit deal. My advantage shall be one board set free.
That sounds reasonable.
It is a non profit deal. My advantage shall be one board set free.
Nice gesture the text "Thanks Papa!"
Would have loved some small surface mounts though!
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I'm really thinking about branding that ...... Papa .......
Papa ...... © by Mighty ZM

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Jensens are in! After two weeks at Dutch customs😡
Almost one monoblock ready... see pics.
I tested the regulators positive and negative, and they seem to work fine, input around 35V, output at 2 Amp: 22.7 Volts ...bit low. Can I change the 3x 9V1 zeners to get a bit higher voltage.
At power up, the voltage slowly increases in about 6 seconds to full voltage.
Almost one monoblock ready... see pics.
I tested the regulators positive and negative, and they seem to work fine, input around 35V, output at 2 Amp: 22.7 Volts ...bit low. Can I change the 3x 9V1 zeners to get a bit higher voltage.
At power up, the voltage slowly increases in about 6 seconds to full voltage.
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That's cool!
I am in for 2 sets. (4 boards)
Yeah! Why not?! What will the cost for a set of PCBs be?
The actual price for a set (2 boards) will be around EUR 30 + shipping cost.
good by me - still would like 2 pairs.
your work is superb !!!
Best
Bob
Yeah! Why not?! What will the cost for a set of PCBs be?
approximately EUR 30 +
Yes. Not really necessay yet. The 2.2mm thick board is stiff enough.
Nice work. Pt 2, the Common Drain DIY version, is out for fab. I ordered
11 pairs of channels (I happen to have 11 pair of FW sinks drilled for 6 x TO-3)
Permaneder, send me an email.
😎
Waiting for you endless findings and gifts.
Common drain for common and deadly beings
King regards.
Common drain for common and deadly beings
King regards.
Pt 2, the Common Drain DIY version, is out for fab.
😎
Pt2 that is fabulous

Mr Pass for Common Drain Symmetric Vfet´s version how many pairs we need ?
Big thanks 🙂
It helps to improve the supply.
I thought big caps after regulator could led to instability of the reg?
Hi sound, early in the morning? Je Je.
Watching for any good news here.
Have a nice weekend.
Hi Dady
Thanks i was just go sleep at the morning after all night party with the music.
Watch and progress everyday.
Thought about capacitors and resistors choice and wattage (biger)in signal path section....elna silmic, pio , teflon with naked z-foil , caddocs ?
http://www.vishaypg.com/docs/63140/var.pdf
Z-foil low noise Resistor
Maybe just diy with nice standard and tweek after ?
Mucho fiesta at the weekend too You !
Best regards
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For buffer Idss grade of LSJ74 and LSK170 from Linear Systems what is the best one ? Matched together ?
8 pieces of LSJ74 ULTRA LOW NOISE SINGLE P-CHANNEL JFET - Parts
8 pieces of LSK170 ULTRA LOW NOISE SINGLE N-CHANNEL JFET
On proposed PCB 220uF cap in output stage maybe supplementary hole for little biger dimension be useful ?
Best regards


8 pieces of LSJ74 ULTRA LOW NOISE SINGLE P-CHANNEL JFET - Parts
8 pieces of LSK170 ULTRA LOW NOISE SINGLE N-CHANNEL JFET
On proposed PCB 220uF cap in output stage maybe supplementary hole for little biger dimension be useful ?
Best regards


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I thought big caps after regulator could led to instability of the reg?
true , when reg is based on NFB
this time , reg being simple follower and also of soft start type , decent cap bank after can't harm
Apparently also true of bipolars w/o NFB, although I have not personally seen it.
Fets, looks like you're safe...
😎
Fets, looks like you're safe...
😎
SONY VFET
Better that way?
8 pieces of LSK170 ULTRA LOW NOISE SINGLE N-CHANNEL JFET
On proposed PCB 220uF cap in output stage maybe supplementary hole for little biger dimension be useful ?
Best regards
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Better that way?
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