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This is "classic version" modification and uses a CCS (constant-current-source) in the "long-tailed" phase inverter for perfect AC phase balance. The tubes are mounted on the other side of the driver board so that they are protrude out of the amp panel.
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Matched pairs or quads of output tubes are not necessary with this design. This service will convert your Dynaco ST-70 to a VTA-70. ANEW quad capacitor with greater capacitance than the original Dynaco unit.
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See our other Dynaco upgrades on the Tubes4HiFi website.
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DYNACO HAFLER AND MANY OTHERS. THESE LIMITERS HELP TO GREATLY REDUCE THE INITIAL TURN-ON SURGE, PROTECTING YOUR UNIT FROM PREMATURE FAILURE. OVER TRIPLE USE THE 1.0 OHM, ETC OR CALCULATE USING OHMS LAW.
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These can also be used for other DIY projects: these are 2 station switches, PCB pins (on both top AND bottom) which need to be used like wire wrap pins for hand wiring, switches are independent and locking.
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Upgrade your Dynakit Mark III amp with a custom sublimated aluminum badge. Price is for one badge sized as shown at 2-5/8" by 1-1/4" made of sublimated. 02" thick satin silver aluminum.
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NOS from military surplus. TUNGSRAM EF86 Military version tight tolerance Valve Vacuum Tube Close Mached Pair 2PCS for TUBE AMP. Alter Lagerbestand RED MILITARY/INDUSTRIAL grade date code (NOS). 2nd 3,05 mA.
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