Squier Sidekick noisy

[rocket]

I have a small Squier Sidekick Amp (5"- speaker, TDA2030, actual Wattage unknown) that is incredibly noisy in the overdrive mode.
The overdrive is just switchable - no gain pot.

Is there any cure?
Does anyboy have a schematic?

I traced part of the amp an I found that the first amplifier stage (around an jrc4558) has just a gain of 2.5! and the input impedance is only 220k.

The OD part has a gain of 45 and two 2n4148 clipping diodes.

I am thinking of increasing the gain of the first stage and reducing the gain of the OD stage plus using red leds for clipping.

And I will increase the input impedance to 470k at least.

Any more Ideas?

[Enzo]

I don't know that Fender even publishes a schematic for these. I can't find one, and I am an authorized repair center. Especially if this is the little amp that comes in a Squire Strat Pack.

I don't know how much noise you have, but these would tend to be noisy on high gain. Any increase in gain you make will also increase the noise. You could always stick a different op amp in there, the existing one might be noisy. You could stick a 5532 in there and it MIGHT be a little less noisy.

The TDA2030 is rated to 30 watts. I SINCERELY doubt this amp comes anywhere near that. If you want to know, look at the power amp rail voltage and consider that peak for output, so .707 times peak would be RMS. FIgure that across the load impedance for rough power out estimate. Now reduce that by 10-20%.

I am not sure what changing the input impedance would do for you, increase the sensitivity to noise maybe? In any case, what is the impedance there when the guitar is connected?

AS a hobby project, go nuts, but I doubt many commercial shops have spent much time hot rodding one.

[rocket]

It IS is hobby project, got it cheap.

I think the noise is caused by the high gain of the OD stage so I think increasing the gain of the first stage might help together with decreasing the gain of the OD stage.

I want to increase to input impeadance because 220k is really low for guitar.

Anyway - I'll just try it out.

Thanks for your opinion.

Rocket

[rocket]

PS: incredibly noisy means: noise is about as loud as the guitar!