Hello,
What is the difference between 2SK170BL, 2SK170GR and 2SK170V? You can find them here: http://www.borbelyaudio.com/pics/Compprice.pdf Not very cheap. I live in Sweden, they are sometimes slightly cheaper here and can be found at various places. At Elfa, the largest supplier here, 100 pieces of 2SK170GR (Toshiba) are about 41 € + shipping. I will be needing some myself. Can buy some extra and send them to you if you are interested.
Roger
What is the difference between 2SK170BL, 2SK170GR and 2SK170V? You can find them here: http://www.borbelyaudio.com/pics/Compprice.pdf Not very cheap. I live in Sweden, they are sometimes slightly cheaper here and can be found at various places. At Elfa, the largest supplier here, 100 pieces of 2SK170GR (Toshiba) are about 41 € + shipping. I will be needing some myself. Can buy some extra and send them to you if you are interested.
Roger
The suffix GR, BL and V are the different Idss of the jfet, and is very important for the different use that you made.
If use in signal preamplifier of small signal o driver, o out of small amplifier ( type OA with discrete device).
I know Borbely, but I think that Elfa is good price and I try to buy from there.
Other important question is that is in Europe and isn’t import tax.
Regards
Gp
p.s. if need you ask.
If use in signal preamplifier of small signal o driver, o out of small amplifier ( type OA with discrete device).
I know Borbely, but I think that Elfa is good price and I try to buy from there.
Other important question is that is in Europe and isn’t import tax.
Regards
Gp
p.s. if need you ask.
i dont know exactly about prices
but
I will order some 2SK170GR myself
They are very useful for audio! .. have a look at www.passdiy.com
..
as well as I will at same time
also order the good alternative Low Noise JFET
2SK117, 50 volt max - unfortunately i do not know the max current of that one ...
this also have different suffixes
but is not told at
http://www.elfa.se/en/
website
Regards from near to you ( north of polar circle! AC-län )
lineup
http://lineup.awardspace.com/
g.pietro!
You can find the schematic here: http://user.faktiskt.se/RogerGustavsson/telinga.pdf
It is not tested. A friend is trying to analize the circuit. Input is about 8 mV at maximum. Maybe the gain is to high. A total gain of 50-100 with the SSM2142 (which has a gain of 2), would suit fine.
As the 2SK170GR are the only ones to be found, maybe there is no choice at all.
Arrividerci!
Roger
(have not been to Italy for some time now and I have lost almost all my knowledge of the italian language...)
You can find the schematic here: http://user.faktiskt.se/RogerGustavsson/telinga.pdf
It is not tested. A friend is trying to analize the circuit. Input is about 8 mV at maximum. Maybe the gain is to high. A total gain of 50-100 with the SSM2142 (which has a gain of 2), would suit fine.
As the 2SK170GR are the only ones to be found, maybe there is no choice at all.
Arrividerci!
Roger
(have not been to Italy for some time now and I have lost almost all my knowledge of the italian language...)
IS NO POSSIBLE OPEN
http://user.faktiskt.se/RogerGustavsson/telinga.pdf
I don’t know why………
Regards
Gipi
http://user.faktiskt.se/RogerGustavsson/telinga.pdf
I don’t know why………
Regards
Gipi
Very weird thing with the file.
I hit this first
http://user.faktiskt.se/RogerGustavsson
got error then hit ENTER once again.
Then I located the file.
telinga.pdf
I hit this first
http://user.faktiskt.se/RogerGustavsson
got error then hit ENTER once again.
Then I located the file.
telinga.pdf
http://user.faktiskt.se/RogerGustavsson/telinga.pdf
Excuse me for delay but the time is always few. I open the MC pre telinga and by examine it is :
From left to right, only the first jfet amplifier, the up id load active ( current generator ), the third is a buffer and adapter the load but no amplifier ( is gain is 1).
Now all is only two stage active in cascade, I think ( if SSM2142 gain 2) all gain 20/30 , if necessity of more gain is necessary change circuit o plus one stage active.
The type of 2SK170 correct is GR small current of Idss.
I hope useful for you.
Regards
g.pietro
Excuse me for delay but the time is always few. I open the MC pre telinga and by examine it is :
From left to right, only the first jfet amplifier, the up id load active ( current generator ), the third is a buffer and adapter the load but no amplifier ( is gain is 1).
Now all is only two stage active in cascade, I think ( if SSM2142 gain 2) all gain 20/30 , if necessity of more gain is necessary change circuit o plus one stage active.
The type of 2SK170 correct is GR small current of Idss.
I hope useful for you.
Regards
g.pietro
That micamp has come a bit further: http://www.ruschkowski.se/tmp/Audio/MicAmp/3/Sigge - Schematics REV A.jpg
Simulated gain is 28 dB and the distorsion is also on the low side.
The circuit will need some matched 2SK170. Borbely Audio is a good source.
Roger Gustavsson
Simulated gain is 28 dB and the distorsion is also on the low side.
The circuit will need some matched 2SK170. Borbely Audio is a good source.
Roger Gustavsson
Have come to this solution.
http://user.faktiskt.se/RogerGustavsson/Sigurd_Roger.pdf
Any comments?
Roger
http://user.faktiskt.se/RogerGustavsson/Sigurd_Roger.pdf
Any comments?
Roger
Re: Have come to this solution.
A simulation by a friend, gave a gain of 25. That is with an Idss of 10 mA. How much difference would an Idss of 15 or 20 mA give?
You can also buy 2SK170 from www.reichelt.de or www.schuro.de .
Roger
GIPIONE said:
A simulation by a friend, gave a gain of 25. That is with an Idss of 10 mA. How much difference would an Idss of 15 or 20 mA give?
You can also buy 2SK170 from www.reichelt.de or www.schuro.de .
Roger
I think that the simulation is correct, I say that the total gain , is only two stage, is 10/15
The first is a common source and usually gain 10/15, the second is e operational amplifier and, I don’t know the connection, you say that gain 2 ; the total is the product.
Now I know the http://www.schuro.de I write four time in English, for order about 100 euro of device…………….. nothing answer; I write three time in German ( a friend help me because I don’t know the language) , and I wait two week the answer…………. Nothing.
Eureka I buy some device to ELFA , and wait the package, but is necessary no order more 50 euro o expedition in expensive ( 45 €).
Expedition with post, minus 50 euro, cost only 12 euro…… acceptable.
Regards.
Giampietro
The first is a common source and usually gain 10/15, the second is e operational amplifier and, I don’t know the connection, you say that gain 2 ; the total is the product.
Now I know the http://www.schuro.de I write four time in English, for order about 100 euro of device…………….. nothing answer; I write three time in German ( a friend help me because I don’t know the language) , and I wait two week the answer…………. Nothing.
Eureka I buy some device to ELFA , and wait the package, but is necessary no order more 50 euro o expedition in expensive ( 45 €).
Expedition with post, minus 50 euro, cost only 12 euro…… acceptable.
Regards.
Giampietro
Hi GIPIONE,
Have you already ordered them frpm Elfa?
Here is another supplier: http://www.futurlec.com/cgi-bin/search/search.cgi
A lot cheaper than Elfa.
Have you already ordered them frpm Elfa?
Here is another supplier: http://www.futurlec.com/cgi-bin/search/search.cgi
A lot cheaper than Elfa.
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