Specifications

Amplifier Care, Feeding, and Applications

Now that your amp is finished, here are a few hints to keep it up and running and you safe

and happy:

– Only plug this amp into properly grounded (three prong) AC receptacles.

– Do not cut off the third prong of the power cord plug thus defeating this safety feature.

– Only plug this amp into the properly wired AC voltages.

– Do not expose this amp to high levels of moisture such as rain or spilled liquids.

– Avoid placing any beverages on the cabinet.

– When ever changing tubes or cleaning this amp, disconnect the amp from the AC

power source and allow amp to cool for 10 min. before beginning.

– It is recommended that the amp is only plugged to AC power when the amp is being

used. Otherwise, it should be left unplugged from AC voltages.

– Avoid exposing this amp to elevated temperatures such as heaters or hot cars or

garages. The expansion and contractions of these temperatures will put undo stress

on all the solder connections, eventually damaging them.

– Always provide adequate ventilation for the tubes and amplifier. An air space of 6” or

more is recommended between the amp and any other object(s), especially around the

rear of the amp. It is a good idea to keep the amp as cool as possible.

Amplifier Feeding

As with any tube amp, the choice of tubes will affect the overall tone of the amp. And of

course, some tube choices are more dramatic than others. Therefore, I encourage everyone

to shape the tone of this amp to suit their tastes through the use of different tubes. Below is a

short list of tubes that can be used for adjusting tone performance without modifying the amp.

Preamp tubes:

– 12AX7A / ECC83 / ECC803 / 7025; (high gain / amplification factor = 100)

– 12AD7; (high gain / amplification factor = 100)

– 12AT7 / ECC81; (high gain / amplification factor = 70)

– 12AY7; (med gain / amplification factor = 40)

– 12AU7 / 5814 / 6189 / 5963 / ECC82; (low gain / amplification factor = 17)

– 12AZ7; (med gain / amplification factor = 60)

– 12DW7; (mixed gain / amplification factor, first triode = 100; second triode = 17)

– 5751; (high gain / amplification factor = 70)

Power tubes:

– 6V6GT - 5871 - 7408 - 7184

Rectifier tubes:

– 5Y3GT - 5AX4 - 5CG4 - 5R4 - 5T4

– 5V4 - 5Z4 - 5AR4 - GZ30 - 6106

Keith Relf of “The Yardbirds”, Leslie Harvey of “Stone the Crows”, and John Rostill of “The

Shadows” all died of electrocution while playing their guitars (Leslie Harvey while on stage).

Proper grounding is more than just important … it can be life or death!

WARNING

Appendix C

40 TubeDepot.com