When I compare a 2sK82 that I removed from board to one that has never been mounted I get the same resistances (DG DS SG)
If I remove the power from the VFETs VRef2 still is between 4.5 to 4.9 V
I think I will change the TL431
If I remove the power from the VFETs VRef2 still is between 4.5 to 4.9 V
I think I will change the TL431
Replaced 431 and trimpot
Will check resistors
Will pull Fets tomorrow and measure voltages at vacated locations
Thanks ZM
Will check resistors
Will pull Fets tomorrow and measure voltages at vacated locations
Thanks ZM
Measured voltage at gates with fets out - i may have board problem
On j28 side I get 8V approx from either the +15V or Gnd
On k82 I get approx 8v from -15V point and mV from GND
On the board where I got 10 mV offset and 1.25A I get,with Fets in,approx 8V from either GND or +/-15V
So I think my problem lies in the k side. (but what do I know)
only thing i see there is 220 cap and jensen - will explore transformer for continuity
Thanks all
On j28 side I get 8V approx from either the +15V or Gnd
On k82 I get approx 8v from -15V point and mV from GND
On the board where I got 10 mV offset and 1.25A I get,with Fets in,approx 8V from either GND or +/-15V
So I think my problem lies in the k side. (but what do I know)
only thing i see there is 220 cap and jensen - will explore transformer for continuity
Thanks all
Looks like I lifted traced around the 220microF cap on the K82 side. Up and running 50mV DC at output with .67 amps
Will try to adjust when I have more patience
Will try to adjust when I have more patience
for dear Nelson Pass and Diyers
is there someone buying from that source ? looks too good to be true ..
chineese fake again ? 😕
http://www.ebay.fr/itm/1pcs-NEW-TOKIN-transistor-2SK182ES-Made-In-Japan-Shipping-charge-FREE-/261781445751?pt=LH_DefaultDomain_0&hash=item3cf363dc77
chineese fake again ? 😕
http://www.ebay.fr/itm/1pcs-NEW-TOKIN-transistor-2SK182ES-Made-In-Japan-Shipping-charge-FREE-/261781445751?pt=LH_DefaultDomain_0&hash=item3cf363dc77
The limited sampling of 2SK182ES I've tested hasn't impressed me thus far as a very good non-feedback audio amplifier, unless perhaps you intend to use them with really high voltages, which I haven't tried.
I didn't buy them from the above source. You may want to check with soundhappy.
The 2SK180 (I bought mine from Sun-Pec) is yielding better results so far. Just my $.02
I didn't buy them from the above source. You may want to check with soundhappy.
The 2SK180 (I bought mine from Sun-Pec) is yielding better results so far. Just my $.02
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Yes i bought few of them from Eyelabo_jp from Tokyo
and they are on way to my home.
I report if received , shipping time take probably two weeks.
After him this is new old stock Tokins right from box like on photos.
Huge elephant sit´s have special unique design like no other transistors with SG on top of case and blue colour around so happyly for diyers is not possible exchange with other just printing brand and reference ...we can sleep well
Maxonic from Japan made with Tokin 2SK182 SIT high fidelity amplifiers like show on page voici link :
SRC?MAXONIC?Amplifier
http://www.src-el-main.com/maxonic/catalog_new/sd-015e.pdf
I like it
Best regards
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I'm sure they're great. The two I got are probably just bad. I'll shut up now. Besides, were OT.
don't be so sure that they're so great ....... for our purposes
if yours are in same 10% bracket , you can expect them all being there
if yours are in same 10% bracket , you can expect them all being there
I know. Sometimes, it's just easier for me to agree and move on.
Things improve at higher current (>5A) or higher voltage (>2-300V) But the fact is they didn't do well in the dumb little lightbulb amp I built to try them out.
(which was the context for my comments in the first place)
I'm sure that others have found wonderful applications for them, and I look forward to someone telling me all about how they did it.
Things improve at higher current (>5A) or higher voltage (>2-300V) But the fact is they didn't do well in the dumb little lightbulb amp I built to try them out.
(which was the context for my comments in the first place)
I'm sure that others have found wonderful applications for them, and I look forward to someone telling me all about how they did it.
I wanted to point out the 2sk182es is a 500W device. There is another device the 2sk182 that's a 1000W device and looks nothing like the 2sk182es. The 2sk182 is a flat round device that needs to be sandwitched between 2 heatsinks. And I think it comes with an input capacitence about 3 times what the 2sk182 has.
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