TDA7297 only working on one channel.

[Phae]

I bought a ready made circuit of TDA7297 online. It worked fine playing on both channels when plugged into my phone. When I plug in my guitar only one channel is working. Any solution to that?

 

[PRR]

Guitar is one channel. You have to "Y" the one signal to the two channels.

 

[mjf]

......you can build in a mono switch

 

[Phae]

Guitar is one channel. You have to "Y" the one signal to the two channels.

Oh I see, how do I "Y" it?

 

[Phae]

......you can build in a mono switch

Can you explain a bit how to build a mono switch for the circuit I have? The picture is at my previous reply.

 

[mjf]

.......do you use a guitar preamp?

 

[farley]

Assuming your guitar has a 1/4" mono phone jack, this cable, or a similar one, should work:

Amazon.com: TISINO 1/4 inch TS Mono to 1/8 inch(3.5mm) TRS Stereo Interconnect Cable(Mono to Stereo)- 3 feet: Industrial & Scientific

 

[Phae]

.......do you use a guitar preamp?

My guitar has a preamp built-in. In this case I would assume the preamp output is mono.

 

[Phae]

Assuming your guitar has a 1/4" mono phone jack, this cable, or a similar one, should work:

Amazon.com: TISINO 1/4 inch TS Mono to 1/8 inch(3.5mm) TRS Stereo Interconnect Cable(Mono to Stereo)- 3 feet: Industrial & Scientific

Thanks for your suggestion, it will be in my list. 🙂

 

[Mikett]

If you turn the circuit over, you will see six connections for the volume control. Join the middle connections. That should do the trick.

 

[Phae]

So I can connect wire to each of the middle connections to a switch and flick in when I'm using a guitar for stereo? Are these the connections u are talking about ?

 

[mjf]

........a little on-off switch connected with these two points ("mono switch")
gives you mono or stereo operation.

 

[Phae]

Got it, will try it after I done my amp casing. Thank you very much!!

 

[Phae]

........a little on-off switch connected with these two points ("mono switch")
gives you mono or stereo operation.

I made the switch and the amp buzzes loud. I extend wire out of the 2 connections.