• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Dynaco ST-70 Kits Compaired FYI

Here are two Dynaco ST-70 Kits. . . FYI

http://www.tubes4hifi.com/bob.htm ($695 EL34) or ($755 KT88)

Re-engineered Driver Board [(3) 12AT7 high gain or (3) 12AU7 low gain or (3) 12BH7 optimized low gain)]
Cap Section increase from 30, 20, 20, 20 quad to 80, 40, 30, 20 quad
(upgrade cap board [$15])
Triode/Pentode Mode switch
Bias pot for each output tube
EL34 or KT88 output tubes

http://store.triodestore.com/st70buildkit.html ($685)

Re-engineered Driver Board [{(2) 6AU6 or (2) EF86} + (1) 12AU7]
Re-engineered Cap Section Board 50-160-50-50 w/surface mount
(upgrade cap board option 40-195-135-135 no surface mount [$70.00])
Tube or solid state power supply
Bias pot for each pair of output tubes