Moog Transistor Matcher Questions
RFAHL
8brain at spiritone.com
Sat Dec 30 08:49:29 CET 2000
I just finished making a copy of the moog transistor matcher. I'm powering
it off +/-15 V, which according to the notes on the diagram is ok.
The circuit seems to be getting really hot. I'm using a BA4558 and it is
too hot too touch when the circuit is on. the regulators get really hot on
the power supply, even though only the matcher is being powered. I checked
the circuit out and I've assembled it correctly as far as I can tell(I did
add the resistor that's missing in the moog diagram). Can this circuit
really handle +/- 15 V?
I've noticed that the measurements aren't steady at all. Once I turn the
power on, the voltage reading on the voltmeter seems to drop as I watch.
I'm assuming that as the transistor heats up more current flows through it,
lowering the Vbe. I would assume that the circuit would be stable and not
subject to much change.
Any ideas as to what the problem may be?
Romeo
More information about the Synth-diy
mailing list