30-05-2022, 04:12 PM
Difference in sound is for the golden eared only. Or perhaps platinum eared given next weekend's events.
Some GZ34 may be of inferior quality giving poor reliability, especially if run hard. I'm not familiar with the MA12 but if it's a sensbly designed hifi amp the GZ34 shouldn't be run very hard. Assuming this is it: https://andydoz.blogspot.com/2020/12/hea...ifier.html then the GZ34 should be living a pretty easy life.
Solid state is great, especially if built into an octal base so it can be readily unplugged. Definitely need limiting resistors, though not sure what value. Watch out for high voltage on the reservoir and smoothing caps because it will be present and higher than normal until the valves have warmed up.
Some GZ34 may be of inferior quality giving poor reliability, especially if run hard. I'm not familiar with the MA12 but if it's a sensbly designed hifi amp the GZ34 shouldn't be run very hard. Assuming this is it: https://andydoz.blogspot.com/2020/12/hea...ifier.html then the GZ34 should be living a pretty easy life.
Solid state is great, especially if built into an octal base so it can be readily unplugged. Definitely need limiting resistors, though not sure what value. Watch out for high voltage on the reservoir and smoothing caps because it will be present and higher than normal until the valves have warmed up.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
