well they look like the other fakes of thid thread, exactly the same 5 BLA seen few pages before.
lesson learned, don't buy at Banzai Music but LT 170 at Mouser !
lesson learned, don't buy at Banzai Music but LT 170 at Mouser !
Just FYI......
I ordered 4 pairs of these (170-GR) and dropped them in one of my Pearl-3 builds.
They work absolutely perfectly.
I have no shame in admitting that after reading this entire thread, I have absolutely no idea what to buy as a direct replacement for the 2SK170 / LSK170.
I want to diy, but I'm not clever enough in the field to know what I'm looking for.
I can follow instruction very well, and this is what I was hoping to do to build an amp camp amp.
?
I want to diy, but I'm not clever enough in the field to know what I'm looking for.
I can follow instruction very well, and this is what I was hoping to do to build an amp camp amp.
?
Hello member @Borats Baby , if you are able to find the pinout diagram on a transistor's datasheet, and understand which pin on the transistor is the gate, which is the source, and which is the drain . . . . then I have some good news for you. There actually does exist a thru hole JFET which can be used in place of the 2SK170 on the Amp Camp Amp board and nowhere else , which is in stock at Farnell UK today, and which costs GBP 2.00 for a bag of five JFETs. Better still, it's been proven. Many dozens of diyAudio members have used it successfully to build an ACA in a weird hedgehog chassis called "RACAM - Round Amp Camp Amp Monoblock". Their amps worked well and sounded wonderful.
The new, cheap, Farnell-stocked JFET has a slightly different pinout than the 2SK170 so a bit of mental gymnastics and fingertip dexterity will be required to stuff the new JFET into the 2SK170's footprint on the ACA printed circuit board.
So, allow me to inquire: are you able to find the pinout diagram on a transistor's datasheet, and understand which pin on the transistor is the gate, which is the source, and which is the drain?
Here's a diyAudio member's young daughter, building a RACAM. IMPORTANT FACT: RACAM is now obsolete, and has been replaced by "ACA Redux" which you can search for on this site.
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The new, cheap, Farnell-stocked JFET has a slightly different pinout than the 2SK170 so a bit of mental gymnastics and fingertip dexterity will be required to stuff the new JFET into the 2SK170's footprint on the ACA printed circuit board.
So, allow me to inquire: are you able to find the pinout diagram on a transistor's datasheet, and understand which pin on the transistor is the gate, which is the source, and which is the drain?
Here's a diyAudio member's young daughter, building a RACAM. IMPORTANT FACT: RACAM is now obsolete, and has been replaced by "ACA Redux" which you can search for on this site.
_
Attachments
If they are clearly identified then yes, of course.
As I say, I can follow instruction very well.
The new, cheap, Farnell-stocked JFET has a slightly different pinout than the 2SK170 so a bit of mental gymnastics and fingertip dexterity will be required to stuff the new JFET into the 2SK170's footprint on the ACA printed circuit board.
RACAM's schematic can be found attached to this post.
Good luck with your ACA!
RACAM's schematic can be found attached to this post.
Good luck with your ACA!
To me, LSK170/LSJ74 (DigiKey) as areplacement parts work very well.
I have built and tested one new module with those Linear Systems LSK/LSJ parts. R8 has to be changed to 220R, everything else remains the same.
Below is the result of THD vs. output voltage at 1kHz and 10kHz, 1kohm load, measuring BW =45kHz. To me, it is fully acceptable. The usual level when used as a preamp would be <= 2V.
It can drive load down to 10 ohm. I will show further results later.
I have built and tested one new module with those Linear Systems LSK/LSJ parts. R8 has to be changed to 220R, everything else remains the same.
Below is the result of THD vs. output voltage at 1kHz and 10kHz, 1kohm load, measuring BW =45kHz. To me, it is fully acceptable. The usual level when used as a preamp would be <= 2V.
It can drive load down to 10 ohm. I will show further results later.