The 6AK5  (European: EF95) (Russian: 6Ж1П) (P/N 154-0014-00,154-0206-00,154-0084-00) is an RF pentode vacuum tube with a miniature B7G 7-pin base.

The high-rel version is the 5654/E95F.

It is used in the vertical preamplifier of the 517, 524, 53/54C, CA, G, K, L and Z.

  • Heater: 6.3 V, 0.175 A, indirect

Tek part numbers:

  • 6AK5: 154-0014-00
  • 5654/6AK5W: 154-0206-00
  • 5654/6AK5W: 154-0084-00
Aged/Checked/Matched Pair Details
Used in Tek Part# S/N Range
517 (V102-104 & V501-V512) 157-0002-00 All
? 157-0026-00 N/A
? 157-0027-00 N/A
Type G Plug-in 157-0054-00 All
MPD Scope 157-0058-00 All
Type Z Plug-in 157-0063-00 All
Type CA, K, B, D and S Plug-ins 157-0117-00 All

157-0058-00 is identical to 157-0054-00.

  • 157-0063 - 6AK5 matched for Z at 210 V plate, 110 V screen, 6.8 mA cathode current

Reference:

Tube aging procedure / Selection and checking procedure

Links

Pictures

Used in

Some instruments using part 6AK5

Instrument Manufacturer Class Model Description Introduced
517 Tektronix Oscilloscope 517 50 MHz scope 1951
524 Tektronix Oscilloscope 524AD TV waveform monitoring scope 1953
B Tektronix Plug-in Type B 20 MHz amplifier plug-in 1954
C Tektronix Plug-in Type (53)C Dual-trace 8.5 (24) MHz amplifier 1954
CA Tektronix Plug-in Type CA 24 MHz dual-channel amplifier 1959
G Tektronix Plug-in Type G 20 MHz differential amplifier 1955
K Tektronix Plug-in Type K 30 MHz amplifier plug-in 1955
L Tektronix Plug-in Type L High-sensitivity 30 MHz amplifier 1957
ML Tektronix Plug-in ML High-sensitivity 30 MHz amplifier 1962
S Tektronix Plug-in Type S Diode recovery tester plug-in 1960
Z Tektronix Plug-in Type Z Comparator preamp plug-in 1960