Re: Amplifier lamp replacement

Eeyore wrote:

John Fields wrote:

"Dave.H" <the1930s@xxxxxxxxxxxxxx> wrote:
Another question I have about this amp. There are four (output)
transistor mounted on a large heatsink at the rear of the chassis, two
of these have two core wires glued on to them. These wires are
soldered in holes on the PC board that have the diode ( >| ) symbol.
What are the purpose of these wires?
I have the schematic that is glued to the bottom of the unit, I can
remove the bottom and scan it if it helps.
---
I'd guess that what's glued onto the transistors are diodes and that
they're being used as temperature sensors.

For bias temperature compensation. That makes sense.


Often they are directly in the bias circuit so it tracks with temperature changes (somewhat), no loop.

--
Regards, Joerg

http://www.analogconsultants.com/

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