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LampizatOr- Amber-3 Manual
Tube rolling and replacement
We sell the DAC with the best tubes we can find in consistent sustainable supply.
Therefore we feel you should not be tempted to change them for any reason.
If you feel that you MUST try other types of tubes – we need to pre-authorize it in
writing. Otherwise you loose the warranty, sorry.
Here are some practical tips for tube rolling:
1. Tube compatibility- many people ask “is the tube X compatible with Y?” and the
answer is of course - it depends. Tubes can have completely different bases but be
compatible by parameters and can be swapped by means of an adaptor. A good
example are ECC40, and 6SN7GT - different bases but very close parameters. Or
ECC88 and 6DJ8. Or 6H8C and 6N1P.
2. Other scenario is when the tubes have same base (say - noval) but they have
different pinouts. So we CAN NOT inter-change the two tube types but we CAN use
an adaptor. Same base type and same pinout DOES NOT MEAN that the tubes are
interchangeable - best example is cc81 and cc82 - same base, same exact pinout
but completely different parameters. Or octal 6SN7 and VT99 - both octal, same
parameters, different pinout.
3. Some tubes can have same base, same pinout and same parameters except the
different heaters. Best example is ECC82 and 12BH7 - the former uses half heating
of the latter. They can be used with a switch or within limited timing or with extra
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