Hi there MIKE

On 04 Jan 03 22:14 you wrote something about *I/F*...

 TK>> Exactly....only "mute"...but that is so strange...there is no
 TK>> form of powersupply connected to the collector at all...and yet
 TK>> it works :-)

 MR> I think it has to do with the C-E impedance of the saturated
 MR> transistor. It will conduct a low level current in both directions. I
 MR> haven't experimented the exact mechanism but I suspect it's because
 MR> the B-C junction becomes forward biased and let's a little emitter
 MR> current
 MR> through, sort of behaving as the 2-diode simplified model.

Yes...i think you are right...that would solve a lot of this mystery.
The base-collector current biasing the collector...hmmm...that must be it.

 MR> I'm
 MR> guessing it's probably not a linear function because the bias voltage
 MR> has a logarithm relation to the current.

No problem there then...a long as it is used in switched applications :-)

 MR> I don't think the Marshall amp is switching 500000 times to
 MR> anywhere... Unless its output has broken out in parasitic
 MR> oscillations...

ROFL!...and souping up all the power of the EL34s in the main stage :-)

Greetingzetcetera, Thom


... Dag Meneer de programmeurdert, waar zijn wij nou helemaal mee bezig ?
--- GoldED+/386 1.1.4.7