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Interest for genuine Toshiba 2SK3497 curve tracer matched pairs & quads
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Old 9th October 2019, 08:50 AM   #111
ZUM911 is offline ZUM911  Australia
diyAudio Member
 
Join Date: Jan 2006
Location: Sydney
Subscription List for Quads (limited to 25 quads):
Itsmee 1 quad CONFIRMED (2 if available)
Blackmani 1 quad CONFIRMED
JeffYoung 1 quad CONFIRMED
MEPER 1 quad CONFIRMED
vvs07 1 quad CONFIRMED
Arthur 1 quad COMFIRMED
Reima 1 Quad CONFIRMED
badrisuper 1 Quad CONFIRMED
Skunark 1 Quad CONFIRMED
mordikai 1 Quad CONFIRMED (2 if available)
Rodeodave 1 Quad
franzm 1 quad (2 if available)
vasilis 1 quad (2 if available) CONFIRMED
Dennis Hui 1 quad
gary s 1 quad CONFIRMED
olderthandirt 1 quad
JoeyDD 1 quad
obh 1 quad
olen 1 quad
Murdoc 1 quad CONFIRMED
Quantensprung 2 Quad CONFIRMED
tubesguy 1 quad CONFIRMED
Lazybutt 1 quad
Cowboy99 1 quad
Spades 1 quad cONFIRMED


Running total: 25 quads

_________________________________ 25 quads cutoff



Subscription List for Pairs (limited to 30 Pairs):
hifibluedevil 2 pairs CONFIRMED
astromo 2 pairs CONFIRMED
G600 1 pair CONFIRMED
Blackdod 2 pairs CONFIRMED
FAA 2 pairs CONFIRMED
Rolle 1 pair CONFIRMED
Luke 2 pairs
darrr 2 pairs
Ernesternest 1pair
ZUM911 2 pair
yoaudio 2 pair CONFIRMED
samoloko 2 pair CONFIRMED
Malvin 2 pairs
rolandong 2 pairs CONFIRMED
Peter Daniel 2 pairs
JimS 1 pair CONFIRMED
Twitchie 2 pairs
_________________________________ 30 pairs (30 cutoff)
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Old 12th October 2019, 11:46 PM   #112
mlwebb is offline mlwebb  United States
diyAudio Member
 
Join Date: Dec 2007
Location: Eugene, OR
Interest for genuine Toshiba 2SK3497 curve tracer matched pairs & quads
Subscription List for Quads (limited to 25 quads):
Itsmee 1 quad CONFIRMED (2 if available)
Blackmani 1 quad CONFIRMED
JeffYoung 1 quad CONFIRMED
MEPER 1 quad CONFIRMED
vvs07 1 quad CONFIRMED
Arthur 1 quad COMFIRMED
Reima 1 Quad CONFIRMED
badrisuper 1 Quad CONFIRMED
Skunark 1 Quad CONFIRMED
mordikai 1 Quad CONFIRMED (2 if available)
Rodeodave 1 Quad
franzm 1 quad (2 if available)
vasilis 1 quad (2 if available) CONFIRMED
Dennis Hui 1 quad
gary s 1 quad CONFIRMED
olderthandirt 1 quad
JoeyDD 1 quad
obh 1 quad
olen 1 quad
Murdoc 1 quad CONFIRMED
Quantensprung 2 Quad CONFIRMED
tubesguy 1 quad CONFIRMED
Lazybutt 1 quad
Cowboy99 1 quad
Spades 1 quad cONFIRMED


Running total: 25 quads

_________________________________ 25 quads cutoff



Subscription List for Pairs (limited to 30 Pairs):
hifibluedevil 2 pairs CONFIRMED
astromo 2 pairs CONFIRMED
G600 1 pair CONFIRMED
Blackdod 2 pairs CONFIRMED
FAA 2 pairs CONFIRMED
Rolle 1 pair CONFIRMED
Luke 2 pairs
darrr 2 pairs
Ernesternest 1pair
ZUM911 2 pair
yoaudio 2 pair CONFIRMED
samoloko 2 pair CONFIRMED
Malvin 2 pairs
rolandong 2 pairs CONFIRMED
Peter Daniel 2 pairs
JimS 1 pair CONFIRMED
Twitchie 2 pairs
_________________________________ 30 pairs (30 cutoff)

waiting list, pairs (?)
mlwebb 2 pair
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Old 13th October 2019, 08:10 AM   #113
Luke is offline Luke  New Zealand
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Join Date: Sep 2001
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Quote:
Originally Posted by mlwebb View Post
Subscription List for Quads (limited to 25 quads):
Itsmee 1 quad CONFIRMED (2 if available)
Blackmani 1 quad CONFIRMED
JeffYoung 1 quad CONFIRMED
MEPER 1 quad CONFIRMED
vvs07 1 quad CONFIRMED
Arthur 1 quad COMFIRMED
Reima 1 Quad CONFIRMED
badrisuper 1 Quad CONFIRMED
Skunark 1 Quad CONFIRMED
mordikai 1 Quad CONFIRMED (2 if available)
Rodeodave 1 Quad
franzm 1 quad (2 if available)
vasilis 1 quad (2 if available) CONFIRMED
Dennis Hui 1 quad
gary s 1 quad CONFIRMED
olderthandirt 1 quad
JoeyDD 1 quad
obh 1 quad
olen 1 quad
Murdoc 1 quad CONFIRMED
Quantensprung 2 Quad CONFIRMED
tubesguy 1 quad CONFIRMED
Lazybutt 1 quad
Cowboy99 1 quad
Spades 1 quad cONFIRMED


Running total: 25 quads

_________________________________ 25 quads cutoff



Subscription List for Pairs (limited to 30 Pairs):
hifibluedevil 2 pairs CONFIRMED
astromo 2 pairs CONFIRMED
G600 1 pair CONFIRMED
Blackdod 2 pairs CONFIRMED
FAA 2 pairs CONFIRMED
Rolle 1 pair CONFIRMED
darrr 2 pairs
Ernesternest 1pair
ZUM911 2 pair
yoaudio 2 pair CONFIRMED
samoloko 2 pair CONFIRMED
Malvin 2 pairs
rolandong 2 pairs CONFIRMED
Peter Daniel 2 pairs
JimS 1 pair CONFIRMED
Twitchie 2 pairs
_________________________________ 30 pairs (30 cutoff)

waiting list, pairs (?)
mlwebb 2 pair
Hi, just removed my name from the list. thanks.
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Old 13th October 2019, 08:20 AM   #114
EUVL is offline EUVL  Europe
diyAudio Member
 
Join Date: Oct 2003
Subscription List for Quads (limited to 25 quads):

Itsmee 1 quad CONFIRMED (2 if available)
Blackmani 1 quad CONFIRMED
JeffYoung 1 quad CONFIRMED
MEPER 1 quad CONFIRMED
vvs07 1 quad CONFIRMED
Arthur 1 quad COMFIRMED
Reima 1 Quad CONFIRMED
badrisuper 1 Quad CONFIRMED
Skunark 1 Quad CONFIRMED
mordikai 1 Quad CONFIRMED (2 if available)
Rodeodave 1 Quad
franzm 1 quad (2 if available)
vasilis 1 quad (2 if available) CONFIRMED
Dennis Hui 1 quad
gary s 1 quad CONFIRMED
olderthandirt 1 quad
JoeyDD 1 quad
obh 1 quad
olen 1 quad
Murdoc 1 quad CONFIRMED
Quantensprung 2 Quad CONFIRMED
tubesguy 1 quad CONFIRMED
Lazybutt 1 quad
Cowboy99 1 quad
Spades 1 quad cONFIRMED
_________________________________ 25 quads cutoff


Subscription List for Pairs (limited to 30 Pairs):

hifibluedevil 2 pairs CONFIRMED
astromo 2 pairs CONFIRMED
G600 1 pair CONFIRMED
Blackdod 2 pairs CONFIRMED
FAA 2 pairs CONFIRMED
Rolle 1 pair CONFIRMED
darrr 2 pairs
Ernesternest 1pair
ZUM911 2 pair
yoaudio 2 pair CONFIRMED
samoloko 2 pair CONFIRMED
Malvin 2 pairs
rolandong 2 pairs CONFIRMED
Peter Daniel 2 pairs
JimS 1 pair CONFIRMED
Twitchie 2 pairs
mlwebb 2 pair
_________________________________ 30 pairs cutoff


Patrick
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Old 14th October 2019, 04:56 PM   #115
PierreQuiRoule is offline PierreQuiRoule  Canada
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Join Date: Feb 2004
Location: Ottawa
Interest for genuine Toshiba 2SK3497 curve tracer matched pairs & quads
Would love a pair if one becomes available...
Pierre
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Old 15th October 2019, 05:23 PM   #116
jims is offline jims  United States
diyAudio Member
 
Join Date: Mar 2007
Interest for genuine Toshiba 2SK3497 curve tracer matched pairs & quads
Hi Patrick

Can you increase me to 2 pairs, now that Luke pulled out?

thanks
JimS
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Old 15th October 2019, 05:31 PM   #117
G600 is offline G600  France
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Join Date: Jan 2014
Location: Amiens
I'm afraid that Patrick has already taken care of mlwebb on Luke's position...
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Old 16th October 2019, 07:44 AM   #118
MEPER is offline MEPER  Denmark
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Join Date: Nov 2017
Location: Copenhagen
Quote:
Originally Posted by EUVL View Post
Further to our GB for Semisouth JFETs for possible Pass J2 DIY clones, we are happy to offer also a limited amount of 2SK3497 quads and pairs.
These can be used to replace the Semisouth's for the SRPP current source.
Patrick
Is the SRPP current source transistor the transistor at the "top" in J2 output stage?

The other still has to be a JFET?

The term "SRPP" ..PP stands for Push Pull? ..but J2 is single ended?
Just try to learn some new stuff :-)
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Old 16th October 2019, 12:02 PM   #119
JeffYoung is offline JeffYoung  Ireland
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Join Date: Jul 2017
Location: Ireland
Interest for genuine Toshiba 2SK3497 curve tracer matched pairs & quads
Yes, the CCS device is the top one, and the bottom one must be a JFET (at least to be a "J2").

In a "true" single ended topology the CCS provides a fixed constant current. In between that and a "true" push-pull are topologies that modulate the CCS to a certain extent to follow the output device.

Some names for these include SRPP (series or shunt regulated push-pull), SEPP (singled ended push-pull), mu follower, and Aleph (a Pass patented design, but not used in the J2).
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Old 17th October 2019, 10:04 PM   #120
gary s is offline gary s  Australia
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Join Date: Nov 2002
Location: Australia
Hi Patrick, are you still looking at end of November for shipping on this group buy - any further updates an testing and when you will call for payments?
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