Jordan Entertainer J110

[joshdfrazier]

Finally received the components for this amp.

Replaced most of the transistors. Bad ones, and ones I was on the fence about.

Powered up through a 60w current limiter, and it works... Sortof. After a few seconds, the bulb begins to glow, and the amp hums badly, and the output begins to distort. The bulb gets brighter, (still orange-ish) and I notice a tiny bit of smoke coming from the board. Quickly shut it off and tried to feel which component was getting hot, but I couldn't tell.

I replaced the "mystery" resistor with a 15ohm. Roly, I suppose your right. As worthless as this amp is, the experience is definitely worth something!

[Roly]

smoke coming from the board

1. Smaller globe.

2. Disconnect speaker

3. Short the bases of the output pair together with a wire link (will de-bias OP stage).

4. Start measuring voltages and write on a copy of the circuit (not the original!).

5. Try to identify the smoker.

6. Post annotated circuit.