8 Super-Matched 2SK170 + 2SJ74 (BL 7-9mA range)

Toshiba Super-Matched Octet

Total 8 pcs Ultra-Low-Noise

J-FET N-Ch and P-Ch Audio Transistors

..........

These JFETs were matched at a constant 72F degrees using a meticulous lab process.

JFETs are inserted into a custom 90-socket gold-pin ZIF test jig (30 devices per test).

A well-regulated and carefully monitored DC supply voltage of 9.00V (not 9.01V) is

applied while FETs are allowed to stabilize for at least 5 minutes before testing.


Current (Idss) and voltage (Vgs) are then measured quickly on a calibrated

Agilent 34401 6-1/2 digit meter. FETs are matched in pairs to within 0.03mA Idss

AND 4mV Vgs. In some cases, the matching is within 0.01mA and 1mV. The

actual measured Idss and Vgs is noted on each packing bag. Octet match

is prioritized by Idss.



Only a few octal-match sets can be achieved in a production matching run. 

When they're gone, they're gone.

 ..........


Brand New - From Original Toshiba Boxes & U.S. Authorized Distributor

TO-92 Package - Uncut - Unsoldered - Tested - Matched 

Sale is for 8 pcs (4ea 2SJ74BL and 4ea 2SK170BL, all super-matched, 7-9mA range).

Flat Rate Priority Mail to 50 States. International typically $44 for insured USPS Priority Mail

or $18 for First Class.

31-Day Returnable only if not as described, and must be uncut and unsoldered.