Danelectro Nifty Fifty

[Ted]

90s Practice Amp.

Looks like a TDA2030/LM1875 power amp

Probably fixable without a schematic, but if anyone knows where to find one, I'd be grateful

[Jazz P Bass]

From what little info I can find, DanElectro does not HAVE the schematic.
Go figure.
Can't pay a guy to trace it out, I guess.
Anyway, there are what, two opamps & an output IC.
Check the power supply first.
There are clipping LED's I think.
They will light if signal is present.
Then see if the signal reaches the TDA.
If it does, and there is no output, then the TDA is toast.

[Ted]

From what little info I can find, DanElectro does not HAVE the schematic.
Go figure.
Can't pay a guy to trace it out, I guess.
Anyway, there are what, two opamps & an output IC.
Check the power supply first.
There are clipping LED's I think.
They will light if signal is present.
Then see if the signal reaches the TDA.
If it does, and there is no output, then the TDA is toast.

It's all about time and money isn't it?

A ten year old Chinese practice amp is worth maybe £30. A new Fender Frontman 15 is £65.
But I'd always prefer to fix an amp than to see it go to landfill.

The power rails seemed OK, The TDA was dead. Replaced it and it seemed fine. After 15 mins running it started to hum - getting louder and louder. Power electrolytics looked fine from above. Pulled them for a closer look and there it was - rubber seal had popped out of one. Replaced both caps and realised the speaker sounded crunchy. Replaced it with the generic 8".

There's just no way to make any money on jobs like this...

[Jazz P Bass]

Look at it as an 'upgrade'.

[J M Fahey]

It could be worse.
You might be "upgrading" it with €65 a pop ELNA silkworm capacitors.
Aluminum electrolytic capacitors for audio applications - Features of the SILMIC series | ELNA
Now that I think of it, Silkworm is the name of a Soviet Missile or something.
How approppriate