Klausmobile Tube Tester Files

Experimental plate curves taken with the klausmobile Tube Tester - Update 02/01/2003 - Note: I do not sell tubes!

General Tube Studies

• How long it takes to warm up ? To cool down? 13/05/2001 - A closer look at tube warm-up delay
• 6N13S (=6AS7 Svetlana) Fixed Biasing Options 04/08/2001
• Searching for a perfect tube tester. An afterthought 15/05/2001

Dual Triodes

• 6N1P-EV Voskhod 09/1990 20/02/2001 Small signal tube - referred to as 6922/6DJ8 clone. See Svetlana site for applications. Warning: being the most popular tube in Soviet practice, it was made by many plants in quite different versions
• 6N2P-EV Voskhod 08/1982 6N2P 01/1958 20/02/2001
• 6N3P-E Saratov 1982 Saratov 1982 - 19/05/2001
• 6N5P Radio frequency tube based on 6N1P platform
• 6N7S Unmarked 12/08/2001 Octal, Dual triode with common cathode - audio Driver or 10W class B Power
• 6N8S Unmarked 21/02/2001 Octal small signal tube - referred to as 6SN7 clone
• 6N9S Saratov 07/1995 21/02/2001 Octal small signal tube - referred to as 6SL7 clone
• 6N6P Novosibirsk 06/1981 Miniature 'baby power' dual triode
• 6N14P Saratov 1970 RF Cascode Amplifier tube (ECC42 clone? Similar yo 6N3P) - 28/06/2001
• 6N18B-V Moscow 09/1980 04/03/2001 Sub-mini dual triode
• 6N23P Saratov 12/1972 Closed plate type 04/03/2001 Referred to as ECC88 clone
• 6N24P Kaluga 1975 Similar to 6N23P - 28/06/2001
• 6N30P-EV Sovtek 09/2000 21/02/2001 Miniature 'baby power' dual triode - nice linearity, low voltage capability as preamp tube
• 12AX7WB Sovtek Just curious. No, I wouldn't ever use this tube.

Single Triodes

• 6S2S Novosibirsk 1963 Ancient octal triode (pre-WW2 design?)
• 6S2P Novosibirsk 1988
• 6S3P-E Saratov 08/1968 Mil Grade 04/03/2001 VHF low-noise small signal triode
• 6S3P Saratov 11/1961 Regular 04/03/2001 VHF low-noise small signal triode. Alive but weaker than specs sample
• 6S4P-EV Saratov 08/1985 - 09/03/2001 Low-noise RF triode, veru low Cag, great Mu/Gm combination
• 6S19P 1978 - 20/04/2001 Measurements with overbias and as a rectifier. Can't reach operating Vg, anyway
• 6S45P-E Saratov 12/1975 - 09/03/2001 baby power tube with up to 50 mA/V transconductance

Pentodes

• Attack of the Clones EL82, EL84, EL86 clones: 6P14P, 6P15P, 6P18P, 6P33P, 6P43P
• 4P1L New addition 17/11/2002: The Last DHT
• 6P9 New addition 17/01/2003: Metal Video Pentode / Single-stage audio power amp
• 6J3 Metal octal pentode
• 6J7 Metal octal pentode
• 6J9P-E High-Gm small pentode [E180F]
• 6J32P Svetlana 06/03/2000 Low-noise RF pentode, EF86 clone.
• 6J51P High-Gm small pentode
• 6P14P aka EL84 aka 6BG5 Saratov 05.2000 - Also see 6P15P page for more info 20.04.2001
• 6P15P-EV Saratov 1978 Video Amplifier Tube similar to SV83 - EL84. Note: Graphics-heavy page 28.06.2001
• 6P6S 12.1975 - Saratov 15.05.2001 Some sources call it a 6V6 clone - who knows?

Mixed Bag of Tubes

• 6Z4P Saratov, 1970 - Mini dual rectifier
• 6Z10P 1987 Single Rectifier
• 6F1P 12.1985 A great triode-pentode. Well, it does look cool. 19/05/2001
• 6F3P Svetlana 1989 05/02/2000 Small triode + 3W pentode.
• 6F12P 09/03/2001 - miniature triode+pentode with an unbelievable triode: 20mA/V and voltage gain over 100 !

Some tips ...

• How to photograph tubes

01/01/2003: Two years after posting most of this data, I checked page counters. There are bad news and good news. Bad news: 6N30P is the most frequent search (1440 hits), next is 6N1P (830). Good news: the visitors ignored some great tubes. No, I won't tell you the names of these sleepers, or the market will sweep all that's left in stock

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