I don't think so 🙂 The photo shows S9014 gain group B for the little 'uns.
Dave needs to do the basic checks first before jumping to conclusions. I also wondered (and this is unlikely) whether the speaker had suffered. In post #1 its mentioned that its 'very quiet', later 'about half as loud' is mentioned.
So it could be anything at this point.
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Hi guys, so I finally dug out my multimeter, had a mess around and really don't know what I'm looking for? Could anyone please be as kind as to step by step me through this? Soldering I'm fine, it's the rudiments that have me goosed. Thanks.
I've had to re-read it all...... it was a long time ago for me 🙂
As mentioned above, can we be 100% sure the speaker is OK ? Have you tried another speaker in its place ?
If you want you can measure and record the voltages on the transistors with the amp powered up:
Looking at the label side of each transistor starting from left to right.
Copy and paste this with the results.
TIP41
B=
C=
E=
TIP41
B=
C=
E=
9014
E=
B=
C=
9014
E=
B=
C=
As mentioned above, can we be 100% sure the speaker is OK ? Have you tried another speaker in its place ?
If you want you can measure and record the voltages on the transistors with the amp powered up:
Looking at the label side of each transistor starting from left to right.
Copy and paste this with the results.
TIP41
B=
C=
E=
TIP41
B=
C=
E=
9014
E=
B=
C=
9014
E=
B=
C=
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