Re: Mullard 5-10 amplifier
That confirms that the hiss is likely to be mainly the thermal noise from that 2.2 meg resistor. Worth noting that the EF86 stage itself is pretty quiet compared with a 2.2 meg resistor. That’s just physics.
As I’ve indicated, the power amp noise level with the preamp connected will be a lot lower than with the input open.
Martin
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