Valve Replacement
Valve life varies, depending upon playing style and application. Power valves have
a much shorter life than pre-amp valves, which can last for years. In order to
maintain the optimum performance of your amplifier, the valves should only be
replaced with the same types of valve, as specified below.
Your Cornell
Rambler
amplifier has eight valves: three pre-amp valves (12AX7/
ECC83), two 12AT7/ECC81 valves for the reverb, two power valves (EL84 for the
Rambler 15
, and EL34 or 6L6 for the
Rambler 40
), and a rectifier valve (GZ34).
Warning
When changing valves, ALWAYS unplug the amplifier, and remember that the
VALVES ARE HOT! Wait for the valves to cool, or replace the valves when the
amplifier has not been used for several hours.
Valve Line-up
Mains
Transformer
Output
Transformer
EL84
EL84
ECC83
Front panel
GZ 34
ECC81
ECC81
ECC83
ECC83
6L6 or
EL34
6L6 or
EL34
Rambler 15
Rambler 40