Article by Carsten Bussler (2A3Manaic)
I am regularly asked whether I know who offers a used Uchida and how much it should cost. The answer to the latter question depends entirely on the condition of the amp. I always strongly advise you to include an inspection and, if necessary, a rebuild by Robert Graetke. It is not uncommon for the device to be a (amateurish) DIY device where a beginner has tried their hand at the kit…
In addition, when rebuilding the Sun Audio/Uchida 2A3, it is easily possible to provide the option of operating the 300B (by simply switching the tubes) and to retrofit the top-accessible wheels for hum balancing.
This SV-2A3, for example, is to be rebuilt at the customer’s request because the current condition of the internal structure is inadequate and the power amplifier is to be upgraded in terms of quality and sound. The power amplifier is to be given a lower overall gain so that it harmonizes better with the preamplifier. The power amplifier will be equipped with Teflon sockets for the tubes, as well as the option of conveniently adjusting the hum from the top (see above). The signal paths are wired with pure silver. Continue reading How to rebuild a Sun Audio SV-2A3/300B Triode Amp…