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Sony VFETs 2SK82 and 2SJ28 matches needed
Sony VFETs 2SK82 and 2SJ28 matches needed
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Old 8th February 2019, 04:33 PM   #1
Rush is offline Rush  United States
diyAudio Member
 
Join Date: Sep 2009
Location: Tarpon Springs, Florida
Default Sony VFETs 2SK82 and 2SJ28 matches needed

Hi DIYAUDIO Ladies and Gentlemen. Update, did some local swapping and now have some new matches and mis-matches. See below:

I am trying to build Nelson Pass version of the Sony VFET Amplifier using two or three output pairs per channel.

We have some Sony VFETs 2SK82 (6) and 2SJ28 (4) that need matches, as the title says.

My hope is that others have a quantity of mismatches also. Maybe we can trade to get closer matches. I am not looking to sell these, at least not yet.

PM me with what you have and what you need.

Could traded a couple of 2SK82s for 2SJ28s in the needed Vgs.

Not in the list below, buy need: 2SJ28 one in 9.0 and one 10.0 Vgs.

Not in the list below, buy need: 2SJ82 one in 7.9 and one 7.7 - 7.8 Vgs.

If there is another way to do these matching swaps, let me know that too.

I tested at 20 volts, 1 ohm resistor for Vgs using the attached Schematic.

Here is our new mis-match list:
Tested at 20 volts, 1 ohm resistor for Vgs
Part Code Vgs
2SK82 KD33 6.09 Rush
2SK82 KD33 6.94 Rush
2SK82 KE33 9.03 Rush
2SK82 HA66 10.95 Rush
2SK82 KE33 8.45 Jon> These two are pretty close, but, if we can match closer???
2SK82 KF33 8.6 Jon>

2SJ28 KE33 7.51 Jon
2SJ28 KE33 8.32 Jon
2SJ28 KE33 11.00 Jon
2SJ28 HA66 11.67 Jon
Attached Images
File Type: jpg Sony VFET Testing setup.jpg (519.0 KB, 303 views)

Last edited by Rush; 2nd March 2019 at 01:20 PM. Reason: Updated list for swap
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Old 9th February 2019, 05:30 PM   #2
dady is offline dady  Europe
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Send a message via MSN to dady Sony VFETs 2SK82 and 2SJ28 matches needed
You have a pair there, the first 82 with the second 28...
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Old 9th February 2019, 05:43 PM   #3
Rush is offline Rush  United States
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Join Date: Sep 2009
Location: Tarpon Springs, Florida
Quote:
Originally Posted by dady View Post
You have a pair there, the first 82 with the second 28...
I am looking to pair SK82 with SK82 and SJ28 with SJ28 so I can double up on outputs.

Got anything?

Rush
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Old 14th February 2019, 04:56 PM   #4
Rush is offline Rush  United States
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Location: Tarpon Springs, Florida
Default Sony VFETs 2SK82 and 2SJ28 matches still needed

Bump.

Rush
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Old 21st February 2019, 08:39 PM   #5
Rush is offline Rush  United States
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Join Date: Sep 2009
Location: Tarpon Springs, Florida
Default Sony VFETs 2SK82 / 2SJ28 matches to trade

Quote:
Originally Posted by Rush View Post
Hi DIYAUDIO guys.

I am trying to build Nelson Pass version of the Sony VFET Amplifier using two or three output pairs per channel.
I have some Sony VFETs 2SK82 (4) and 2SJ28 (4) that need matches, as the title says.

My hope is that others have a quantity of mismatches also. Maybe we can trade to get closer matches. I am not looking to sell these, at least not yet. I do have some other Sony VFETs so I might be interested in trading for other values of Vgs as well. PM me with what you have and what you need.
If there is another way to do these matching swaps, let me know that too.

I tested at 20 volts, 1 ohm resistor for Vgs using the attached Schematic.

Here is my mismatch list:
Part Code Vgs
2SK82 HA66 10.95
2SK82 KE33 8.45
2SK82 KD33 6.94
2SK82 KD33 6.09

2SJ28 HA66 11.67
2SJ28 KE33 11
2SJ28 KE33 9.95
2SJ28 KE33 8.89
Bump.
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Old 2nd March 2019, 01:22 PM   #6
Rush is offline Rush  United States
diyAudio Member
 
Join Date: Sep 2009
Location: Tarpon Springs, Florida
Default Bump

Quote:
Originally Posted by Rush View Post
Hi DIYAUDIO Ladies and Gentlemen. Update, did some local swapping and now have some new matches and mis-matches. See below:

I am trying to build Nelson Pass version of the Sony VFET Amplifier using two or three output pairs per channel.

We have some Sony VFETs 2SK82 (6) and 2SJ28 (4) that need matches, as the title says.

My hope is that others have a quantity of mismatches also. Maybe we can trade to get closer matches. I am not looking to sell these, at least not yet.

PM me with what you have and what you need.

Could traded a couple of 2SK82s for 2SJ28s in the needed Vgs.

Not in the list below, buy need: 2SJ28 one in 9.0 and one 10.0 Vgs.

Not in the list below, buy need: 2SJ82 one in 7.9 and one 7.7 - 7.8 Vgs.

If there is another way to do these matching swaps, let me know that too.

I tested at 20 volts, 1 ohm resistor for Vgs using the attached Schematic.

Here is our new mis-match list:
Tested at 20 volts, 1 ohm resistor for Vgs
Part Code Vgs
2SK82 KD33 6.09 Rush
2SK82 KD33 6.94 Rush
2SK82 KE33 9.03 Rush
2SK82 HA66 10.95 Rush
2SK82 KE33 8.45 Jon> These two are pretty close, but, if we can match closer???
2SK82 KF33 8.6 Jon>

2SJ28 KE33 7.51 Jon
2SJ28 KE33 8.32 Jon
2SJ28 KE33 11.00 Jon
2SJ28 HA66 11.67 Jon
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