Matched Pair - Ulm '64 Matching codes
2x Telefunken EF86 6267 Silver Plates - ◇ Bottom - Ulm 1964 - Same Code - NOS
$244.80
Product Summary
Model: 1964 Telefunken EF86 6267 (Made in Germany)
Soundlumia Tube Sound Rating: 9.5/10 - Outstanding
Early 1960s Ulm, Germany production - Unparalleled sound characteristics and superb build quality - True holographic sound stage with layered details and ultra clarity
Date code: U 7004206 (U = Ulm, 4 = 1964)
GM (Mutual Conductance) test result: 92%/112% NOS
Silkscreen: 100%
Packaging: NEW white tube boxes.
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 1.83 mA/V - 92% (100% = 2.00 mA/V)
Measured plate current(IA): 3.047 mA - 102% (100% = 3 mA)
Tube 2:
Measured transconductance(GM): 2.24 mA/V - 112% (100% = 2.00 mA/V)
Measured plate current(IA): 3.01 mA - 100% (100% = 3 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
Matched Pair - Ulm '60 Red Tip
Telefunken EF86 6267 Red Tip Matched Pair ◇ Bottom - Ulm 1960 - NOS
$365.40
Product Summary
Model: 1963 Telefunken EF86 6267 O-getter (Made in Germany)
Soundlumia Tube Sound Rating: 9.5/10 - Outstanding
Early 1960s Ulm, Germany production - Unparalleled sound characteristics and superb build quality - True holographic sound stage with layered details and ultra clarity
Date codes:
U9010007 (U = Ulm, Germany, 0 = 1960)
U1320380 (U = Ulm, Germany, 0 = 1959)
GM (Mutual Conductance) test result: 104%/100% NOS
Silkscreen: 100%
Packaging: New Telefunken reproduction boxes
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 2.08 mA/V - 104% (100% = 2.00 mA/V)
Measured plate current(IA): 3.302 mA - 110% (100% = 3 mA)
Tube 2:
Measured transconductance(GM): 1.99 mA/V - 100% (100% = 2.00 mA/V)
Measured plate current(IA): 2.65 mA - 88% (100% = 3 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
Single Tube - Berlin '58
1x Telefunken EF86 = 6267 Silver Plates ◇ Bottom - Berlin '58 - NOS
$137.50
Product Summary
Model: 1958 Telefunken EF86 (Made in Germany)
Soundlumia Tube Sound Rating: 9.5/10 - Outstanding
1950s Berlin, Germany production - Unparalleled sound characteristics and superb build quality - True holographic sound stage with layered details and ultra clarity
Date code: B og 01 (B = Berling, og = June 1958, 01 = Internal #)
GM (Mutual Conductance) test result: 105% NOS
Silkscreen: 100%
Packaging: NEW white tube boxes.
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 2.09 mA/V - 105% (100% = 2 mA/V)
Measured plate current(IA): 2.92 mA - 97% (100% = 3 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
*SOLD*
Single Tube - Ulm '60 Red Tip
Telefunken EF86 6267 Silver Plates Red Tip - ◇ Bottom - Ulm 1960 - NOS+
$182.45
Product Summary
Model: 1960 Telefunken EF86 6267 Silver Plates Red Tip (Made in Germany)
Soundlumia Tube Sound Rating: 9.5/10 - Outstanding
1960s Ulm, Germany production - Unparalleled sound characteristics and superb build quality - True holographic sound stage with layered details and ultra clarity
Date code: U9100xxx (U = Ulm, 0 = 1960)
GM (Mutual Conductance) test result: 121% NOS
Silkscreen: 50-60%
Packaging: NEW white tube boxes.
Professional Tube Testing
This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:
Tube 1:
Measured transconductance(GM): 2.42 mA/V - 121% (100% = 2 mA/V)
Measured plate current(IA): 3.67 mA - 122% (100% = 3 mA)
NO shorts, leakage or gas. NO noise or microphonics.
Curve trace is also included in the original RoeTest report.
