Another tube overdrive thread

[Lizard King]

NOTE:  Just after posting this I found the Penta Driver thread....I think I'll play around with using these tubes in that circuit.

I have a 1SH18b tube lying around.  These are tiny Russian pentode tubes and they'd be perfect to fit into a 125B enclosure.  I'm not much of a tube guy so I have no idea if a pentode could make a decent overdrive.  I was able to find some specs on them if anyone is interested:

Name             1J18B
Type             penthode
Application      HF voltage amplification
Cathode type     oxide, direct heating
Envelope         glass, miniature
Mass,g           4
Socket type      flexible


Filament voltage, V      nominal – 1.2
The voltage at the anode, V   nominal – 60
Grid1 voltage, V      nominal – 0
Grid2 voltage, V      nominal – 45
Filament current, mA      not less than – 21
         nominal – 23.5          
         no more – 26
Anode current, mA      not less than – 0.85
         nominal – 1.35          
         no more – 1.85
reverse current of the grid1, uA  no more – 0.5
current of the grid2, uA   no more – 0.25
Steepness, mA/V      not less than – 0.7
         nominal – 1.15          
         no more – 1.6
Steepness with no filament, mA/V  not less than – 0.55
Resistance equivalent noise inside the tube, kOhm        
         no more – 7
input resistance, kOhm   not less than – 100
input capacitance, pF       not less than – 2.35
         nominal – 3.25
          no more – 4.15
output capacitance, pF   not less than – 2
         nominal – 2.4
         no more – 2.8
transfer capacitance, pF   no more – 0.01

[Lizard King]

Regarding the Penta Driver circuit.  Has anyone tried it with Russian tubes.  They're practically giving the Ruskies away on eBay right now ~$1 a piece.