Thank you juma for serenading me with a song painting me strange. I commend you for an accurate readout. and especially this creative approach to deliver the message. I forgot all about lip-sinking.
People are strange when you're a stranger
Faces look ugly when you're alone
Women seem wicked when you're unwanted
Streets are uneven, when you're down
When you're strange
Faces look ugly when you're alone
Women seem wicked when you're unwanted
Streets are uneven, when you're down
When you're strange
I must recognize that is time for change my strange behaviour of communicate with haughtiness people,
I do not even want to lose the most important thing that is happening in this extraordinary forum. Sorry gentlemen.
I do not even want to lose the most important thing that is happening in this extraordinary forum. Sorry gentlemen.
I had a feeling this part II would involve jfets and SITs. Go figure.. 😛
Anyways, got my set of Sony's 😀
Hi 🙂
Last evening i have good time at the bench and tests vfet batch.
I used electronic components automatic tester to see if i find some pairs.
This tool was programed and detect 2SK parts only not 2SJ.
Voici the table :
border="1"
|-
| class="tcat"| #
| class="tcat"| 2SK82
KE-33
Vgs=
| class="tcat"| Current
I=mA
|-
||1||3,96|| 5,7
|-
||2||4,18|| 6,0
|-
||3||4,21|| 6,0
|-
||4||4,21|| 6,0
|-
||5||4,23|| 6,1
|-
||6||4,23|| 6,1
|-
||7||4,33|| 6,2
|-
||8||4,34|| 6,2
|-
||9||4,38|| 6,3
|-
||10||4,39|| 6,3
Greetings
Last evening i have good time at the bench and tests vfet batch.
I used electronic components automatic tester to see if i find some pairs.
This tool was programed and detect 2SK parts only not 2SJ.
Voici the table :
|-
| class="tcat"| #
| class="tcat"| 2SK82
KE-33
Vgs=
| class="tcat"| Current
I=mA
|-
||1||3,96|| 5,7
|-
||2||4,18|| 6,0
|-
||3||4,21|| 6,0
|-
||4||4,21|| 6,0
|-
||5||4,23|| 6,1
|-
||6||4,23|| 6,1
|-
||7||4,33|| 6,2
|-
||8||4,34|| 6,2
|-
||9||4,38|| 6,3
|-
||10||4,39|| 6,3
Greetings
@ Tea Bag & Diyers
What your current ?
I don't think this small tester are perfect made for vfet´s Vgs procedure.
http://www.diyaudio.com/forums/pass-labs/253411-article-sony-vfets-part-1-a-110.html#post4321408
Ok for basic test´s : source drain resistance and diode characteristic
from Sony service manual , look at attached thumbnails.
I near future i try great " Frankentracer" and i am on way to complete
Locky_z usb tracer i need some windows pc to work this tool,
in everyday life i always work on apple computer.
Anyway i do with dear Papa councils and
that mean aluminum profiles must be drilled 🙂
Kind regards
What your current ?
I don't think this small tester are perfect made for vfet´s Vgs procedure.
http://www.diyaudio.com/forums/pass-labs/253411-article-sony-vfets-part-1-a-110.html#post4321408
Ok for basic test´s : source drain resistance and diode characteristic
from Sony service manual , look at attached thumbnails.
I near future i try great " Frankentracer" and i am on way to complete
Locky_z usb tracer i need some windows pc to work this tool,
in everyday life i always work on apple computer.
Anyway i do with dear Papa councils and
that mean aluminum profiles must be drilled 🙂
Kind regards
Attachments
Does anyone have a source/pn for the PS transformers specified for the csx 1 or 2. I am having trouble finding twin 120V primaries with 12 or 24 secondaries. Avel Lindbergh will do custom if needed. I could ,of course use two transformers per channel in parallel but space is an issue.
This Antek is in stock and should work fine:
AS-4224 - 400VA 24V Transformer - AnTek Products Corp
Cheers,
Dennis
AS-4224 - 400VA 24V Transformer - AnTek Products Corp
Cheers,
Dennis
So we need two of these Antexs for a mono-black pair, right? Will a single Antex have sufficient current for a stereo amp?
The transformers he referenced are 400VA, which is a bit over the 300VA that is used in the schematic by NP. Those will work fine both for mono-block, and perhaps for a stereo amp as well.
I ordered a pair of 300VA transformers from Plitron awhile back, when I needed some other transformers, and needed to make the $300 minimum order they have. I am planning to make pretty much the PSU schematic as drawn in the article, although I may add a snubber, and delay circuit/speaker protector.
I ordered a pair of 300VA transformers from Plitron awhile back, when I needed some other transformers, and needed to make the $300 minimum order they have. I am planning to make pretty much the PSU schematic as drawn in the article, although I may add a snubber, and delay circuit/speaker protector.
Why dual primaries - is this simply for potential 115/230V compatibility, or is there some other functional requirement/benefit?
BK
In the meantime ... Quickie 2SK82 Head Amp
If I build Part 2, I will have some 2SK82s extra, in addition to service replacements, and they are eating a hole in my parts drawer.
So while waiting for Part 2, I decided to try something a bit different, a quick and very simple single-ended follower headphone amp. Mostly re-used bits I had lying around, with an industrial look to complement those TO-3 metal cans.
With grounded gate, Vgs is about 6v and Vds 12v, bias at about 200ma set by LM350 (had to be a TO-3 device) current sink for around 0.019% distortion (mainly 2nd harmonic) at a loud listening level on my 32 Ohm headphones. You can trace the wires in the underside photo for the "schematic".
Hey, it's fun, it works, and sounds OK to me. 😉
If I build Part 2, I will have some 2SK82s extra, in addition to service replacements, and they are eating a hole in my parts drawer.
So while waiting for Part 2, I decided to try something a bit different, a quick and very simple single-ended follower headphone amp. Mostly re-used bits I had lying around, with an industrial look to complement those TO-3 metal cans.
With grounded gate, Vgs is about 6v and Vds 12v, bias at about 200ma set by LM350 (had to be a TO-3 device) current sink for around 0.019% distortion (mainly 2nd harmonic) at a loud listening level on my 32 Ohm headphones. You can trace the wires in the underside photo for the "schematic".
Hey, it's fun, it works, and sounds OK to me. 😉
Attachments
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