Valves fitted to a Selmer Truvoice

[Chas]

Hi All,
I've got an old Selmer Truvoice amp (early '60's) which I believe is called a 'Standard'? It has tremelo and a 10" speaker. There is valve missing and I'm trying to identify it. When you remove the back panel, there are 4 valves facing you - on the left hand side are 2 smaller valves, and it's the lower one of the two (nearest the speaker) that's missing. Anyone any thoughts on what may have been fitted?
Regards, Chas.

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[olemuso]

What are the other valves?
I can`t find anything on a Standard but the Compact 30 uses an ECC82, an ECC83 and a pair of EL506
Maybe some help

[Chas]

Hi Ian,
The 2 larger valves are EZ80 (on the right), EL84 (in the middle), and of the 2 small ones on the left, the upper one is a EF86.
I've included another pic of how the looks (for identification) - the pics aren't my actual amp, but are identical.
Chas.

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[Charlie Hall]

Hi Chas,
I have researched this for you. There was an earlier model called the new standard which has the same circuit. If your EF86 is in the correct position (and I think it is), the missing valve is an ECC83 (12AX7).
Your amp might work without the ECC83 as I think it is for the tremolo effect. If it doesn't work now, it might not work with the missing valve installed.
Regards,
Charlie

[Chas]

Hi Charlie,
Thanks for your research, that's very kind of you.
The tremelo pot doesn't turn off - i.e. if you don't want the effect, you turn it to min., so I think the valve is probably part of the circuit - so might have some luck!

Best Wishes for the New Year,
Chas.

[Chas]

Thanks Charlie,
ECC83 is the one - amp now working fine!
Chas.