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bach/yamaha euph
Posted: Tue May 10, 2005 5:05 pm
by Matthew Gaunt
can anybody tell me if the back 4 valve is really the same as the yamaha 321 euph
thanks
Posted: Tue May 10, 2005 7:00 pm
by Bob Mosso
There seems to be a couple minor differences from the descriptions on the web sites:
Yamaha/Bach
leadpipe material: gold brass/red brass
valve stems: silver plated brass?/anodized aluminum
the lacquer version of the Bach has chrome plated slide tubes
Posted: Tue May 10, 2005 7:46 pm
by Chuck(G)
Bob Mosso wrote:
leadpipe material: gold brass/red brass
"Red brass" is usually 90% copper and 10% zinc; "gold brass" (contains no gold) is usually 85% copper and 15% zinc; "Yellow brass" is usually 70% copper, 30% zinc.
So the difference ibetween "gold brass" and "red brass" is quite small. In an alloy of 85% copper, 15% zinc, I imagine that either term could apply.