Yamamoto A08-S Amplifier Kit
August 24
th
2009 b
www.jacmusic.com
Horber Steige 25 * 72172 Sulz * Germany * Tel: ++49-1755382641
First we must say, for legal reasons it is not possible that our company JACMUSIC writes an official
manual for other companies products. However we answer often technical questions about the A08-S,
so we intend this document to be used only additional to what is officially supplied by the
YAMAMOTO SOUNDCRAFT COMPANY OF JAPAN.
An earlier version of this amplifier was called A08. This newer version is called A08-S, where the S
stands for the DC current meter, and lower hum of the output signal, and replacement of the 5U4G
tube with the Type 80 tube.
The A08-S is supplied by the factory as pictured above, with 8 Ohms output. A special version can be
ordered, such as amplifiers designed for Western Electric 205D tubes, or a 16 Ohms output.
Materials used
The wood is cherry, which is beautiful looking by itself, but not very suitable to construct a tube
amplifier directly. So before use, the wood is specially treated by Yamamoto, called the Shashih
process. This process significantly increases the hardness, and in this way, the thread of the screws can
be cut directly in the wood, even for very small screws like 3mm, this works excellent. Also the
Copyright by:
www.jacmusic.com
* Horber Steige 25 * 72172 Sulz * Germany * Tel: ++49-1755382641
Copying of this document is not allowed, also not partially, and also not for private publication in the internet. In case of
copyright violation, we have the right to take legal action without notice.
