Re: Amplifier lamp replacement

On Fri, 28 Nov 2008 19:44:34 -0800 (PST), "Dave.H"
<the1930s@xxxxxxxxxxxxxx> wrote:

On 27 Nov, 12:50, "Dave.H" <the19...@xxxxxxxxxxxxxx> wrote:
I have an old stereo amplifier in whch some of the indicator lamps
have blown. Unfortunately two of these are enclosed in the VU meters,
I'm wondering if it's possible to open up the meters and replace them,
if not, hot glue some replacements to the exterior.

Picture:http://picasaweb.google.com.au/the1930s/Misc#5273147456088310786

TIA

Dave
Australia

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.

JF
.

Relevant Pages

  • Re: Amplifier lamp replacement
    ... I'm wondering if it's possible to open up the meters and replace them, ... hot glue some replacements to the exterior. ... of these have two core wires glued on to them. ... I take it to be a diode. ...
    (sci.electronics.basics)
  • Re: Amplifier lamp replacement
    ... I'm wondering if it's possible to open up the meters and replace them, ... of these have two core wires glued on to them. ... I take it to be a diode. ... transistor and the diode is hanging in midair. ...
    (sci.electronics.basics)
  • Re: Amplifier lamp replacement
    ... I'm wondering if it's possible to open up the meters and replace them, ... of these have two core wires glued on to them. ... I take it to be a diode. ... transistor and the diode is hanging in midair. ...
    (sci.electronics.basics)
  • Re: Amplifier lamp replacement
    ... have blown. ... I'm wondering if it's possible to open up the meters and replace them, ... of these have two core wires glued on to them. ... I have the schematic that is glued to the bottom of the unit, ...
    (sci.electronics.basics)
  • Re: Amplifier lamp replacement
    ... have blown. ... I'm wondering if it's possible to open up the meters and replace them, ... of these have two core wires glued on to them. ... I have the schematic that is glued to the bottom of the unit, ...
    (sci.electronics.basics)