UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Mullard 5-10 amplifier

vampyretim · 9th Jul 2019, 12:58 pm

Hi all,

With the preamp connected or disconnected from the BNC input the 5-10 hisses but with the preamp disconnected and the 5-10 BNC input shorted to deck the hiss practically disappears. I have tried replacing the 2.2M resistor but it made no difference. I'm a bit confused, does this make sense to anyone?

9th Jul 2019, 12:58 pm	#104
vampyretim Heptode Join Date: Aug 2011 Location: Bristol, UK. Posts: 538	Re: Mullard 5-10 amplifier Hi all, With the preamp connected or disconnected from the BNC input the 5-10 hisses but with the preamp disconnected and the 5-10 BNC input shorted to deck the hiss practically disappears. I have tried replacing the 2.2M resistor but it made no difference. I'm a bit confused, does this make sense to anyone?