TDA2050 Amplifier Circuit - UK Vintage Radio Repair and Restoration Discussion Forum

Radio Tech · 24th Jul 2015, 9:27 am

I don't know if this is correct section for this but here goes, a Radio Amateur I know recently started to construct a solid state amplifier using a TDA2050, but the book he got the circuit from I can not find the info, and this circuit included the pre-amp. Does any member know where I can find a complete circuit like this as I would love to have a go at making an amplifier that has few components and is of use. PM me if you have the answer please

Best wishes

Ken

julie_m · 24th Jul 2015, 2:33 pm

All the TDA20xx devices are basically just op-amps with enough oomph in the output stage to drive a loudspeaker. As with all op-amps, available gain decreases with frequency, but don't rely on this alone to keep the circuit stable. You will find application circuits in the data sheets.

For the pre-amp, you might find a suitable application circuit in the data sheet of a low-noise op-amp such as the NE5534 / 5532. You just need possibly an RIAA phono stage, an input selector switch (maybe even separate "listen" and "record" switches), and volume and tone controls.

Restoration73 · 24th Jul 2015, 5:26 pm

This is the Maplin version

24th Jul 2015, 9:27 am	#1
Radio Tech Nonode Join Date: Dec 2012 Location: Bocking, near Braintree, Essex, UK. Posts: 2,071	TDA2050 Amplifier Circuit I don't know if this is correct section for this but here goes, a Radio Amateur I know recently started to construct a solid state amplifier using a TDA2050, but the book he got the circuit from I can not find the info, and this circuit included the pre-amp. Does any member know where I can find a complete circuit like this as I would love to have a go at making an amplifier that has few components and is of use. PM me if you have the answer please Best wishes Ken

24th Jul 2015, 2:33 pm	#2
julie_m Dekatron Join Date: May 2008 Location: Derby, UK. Posts: 7,735	Re: TDA2050 Amplifier Circuit All the TDA20xx devices are basically just op-amps with enough oomph in the output stage to drive a loudspeaker. As with all op-amps, available gain decreases with frequency, but don't rely on this alone to keep the circuit stable. You will find application circuits in the data sheets. For the pre-amp, you might find a suitable application circuit in the data sheet of a low-noise op-amp such as the NE5534 / 5532. You just need possibly an RIAA phono stage, an input selector switch (maybe even separate "listen" and "record" switches), and volume and tone controls. __________________ If I have seen further than others, it is because I was standing on a pile of failed experiments.