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

Boulevardier · 9th Jul 2019, 3:16 pm

Assuming that you're talking about the input of the 5-10,and that it goes direct to the control grid of the EF86, then Mullard specify the value of that grid-leak resistor as 1 Mohm (see the text underneath the 5-10 circuit diagram in the Mullard book - page 40). However, I doubt if the wrong value would cause hiss - but it's worth trying replacing it with the right value.

Mike

9th Jul 2019, 3:16 pm	#112
Boulevardier Octode Join Date: Sep 2017 Location: Bristol, UK. Posts: 1,658	Re: Mullard 5-10 amplifier Assuming that you're talking about the input of the 5-10,and that it goes direct to the control grid of the EF86, then Mullard specify the value of that grid-leak resistor as 1 Mohm (see the text underneath the 5-10 circuit diagram in the Mullard book - page 40). However, I doubt if the wrong value would cause hiss - but it's worth trying replacing it with the right value. Mike Last edited by Boulevardier; 9th Jul 2019 at 3:33 pm.