Midget mono amp for.my tv

[Colas LeGrippa]

Hola amigos,


I need a small mono amplifier for.my tv. With one RCA input, one volume and one headphone out. My tv is not connected to any cable and the sound is coming with the picture through an inside rabbit ears antenna. The tv is modern though with an optical sound output to which is connected an adapter with a RCA plug.
Up to now I was using an old cassette deck with earphone out to listen to the tv. I am 50 percent deaf and that s the way I can listenn to t.v. I dont want to buy nothing cheapo (china)or transistorized but build me one. It will last for years and I ll be able to do the service when it comes defective.


Thanks for help

[Colas LeGrippa]

I only need a proven good schematic, no more !


(But if there's a christmas gift that comes with it, I' ll take it  ).

[sluckey]

Maybe use that small amp you just built. Easy to put a headphone jack on it.

[Colas LeGrippa]

Too much distortion..
Any circuit diagram for the headphone ?

[SILVERGUN]

Colas, I searched for "headphone" and look what came up. 
HEADPHONE tube amp (el34world.com)

[Colas LeGrippa]

very interesting indeed 

[PRR]

.

[AmberB]

It would be pretty easy to build a stereo version of this little amp...just double the VA capacity on the power transformers and get 2 output transformers.

[Colas LeGrippa]

PRR,  gee an intelligent answer.


You're my man.

[blackcorvo]

It would be pretty easy to build a stereo version of this little amp...just double the VA capacity on the power transformers and get 2 output transformers.

No need to double the VA on the isolation transfomer, 10VA is plenty for a pair of 6AU6's (they can take 3w of plate dissipation max, and this desing is at about half of that).

But for the filament one, you could use either 6v @ 1.2A or a 12v @ 0.6A, since you could wire the tube filaments in series. You could even use the mid-point between each filament to make a "center tap" for reducing hum.


Just to give you an idea, I redrew PRR's schematic on DIYLC, with the alternative 12v transformer filament supply.

[Colas LeGrippa]

Very neat drawing

[blackcorvo]

I'm now tempted to try it, but using 5636 submini tubes, just to hear how loud it can get...


[UPDATE]
I tried it and it works!  But it's probably better suited as a headphone amp (loud enough to run some 600-ohms headphones, I bet).