UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - I want to build a stereo headset valve amplifier

Don_Zalmrol · 27th Dec 2011, 8:23 pm

well that resistor was the problem in my circuit. The amp started acting strangely with overheating the #2 valve (E34L). When I removed the output (with attenuator resistors) for the headphones and "tuned" the bias, the problem was gone.

And with this amp I'm throwing away the capacity of the amp for only powering a headphone and not only speakers. (40Watts powering only a headset, it's like swatting a mosquito with a cannon…)

So I've decided to use this amp for something else and build myself trough a home-made or kit amplifier that only powers a headphone.

27th Dec 2011, 8:23 pm	#14
Don_Zalmrol Hexode Join Date: May 2009 Location: Ghent, Belgium Posts: 273	Re: I want to build a stereo headset valve amplifier well that resistor was the problem in my circuit. The amp started acting strangely with overheating the #2 valve (E34L). When I removed the output (with attenuator resistors) for the headphones and "tuned" the bias, the problem was gone. And with this amp I'm throwing away the capacity of the amp for only powering a headphone and not only speakers. (40Watts powering only a headset, it's like swatting a mosquito with a cannon…) So I've decided to use this amp for something else and build myself trough a home-made or kit amplifier that only powers a headphone.