On Mon, 12 Mar 2012 15:26:38 +1100, Sylvia Else
wrote:


There is a note near the battery connector which indicates what
appears to be a quiescent current between .020 and .022A. In fact when
I started this project I measured .025A on the bench power supply with
7.50V applied to the battery terminals. Therefore, given my initial
quiescent current reading, if all that current is indeed flowing
through R46 then I should have dropped 2.50V across R46. However I
never monitored that point so I didn't know. This morning the radio
was still working and I noted that Vr46 was .840V. Quiescent current
is still .025A. So now I'm really confused. Are you supposed to start
off with 9.0 Volts at the battery terminals for voltage measurement
purposes or is it 7.50 Volts? I can say with every certainty that with
7.50V applied the actual circuit voltages did almost mimic what the
schematic shows when the radio was operational. Or has my supply been
at least 1.50V - 2.50V too low throughout this experiment? Lenny

After reading this thread through to this post i have a question. Can you
find the traces where R24 and R27 meet? I suspect a crack between there
and the + rail.

?-)

That wouldn't have the observed effect on the base and emitter voltages.

Sylvia.

Please to explain just why. As i don't think any possible intermittent
failure of C38 will explain the voltages seen.

?-)