1

MP566 Tube microphone preamplifier / Re: MP566 no DI sound

« on: November 21, 2025, 02:58:13 PM »

Thank you very much!

The voltage is 21,37V in both situations, no drop.
I will replace the Q1.

I will send an email for an order (need some other things as well  ).

Kindest regards,
Tom

2

MP566 Tube microphone preamplifier / MP566 no DI sound

« on: November 16, 2025, 11:44:42 PM »

Hi,

I assembled my (second) MP566.
Everything works fine, except for the DI.

When I insert a jack, I keep receiving the sound of the Mic Input.

I read somewhere at the forum, it could be that the Q1 is damaged?

How can I find out?

Thanks in advance!
Tom

3

MP566 Tube microphone preamplifier / Re: C4 and R51 specs

« on: July 17, 2024, 04:47:31 PM »

I figured it would be ok.

Thank you very much!
Better to be sure 

T

4

MP566 Tube microphone preamplifier / C4 and R51 specs

« on: July 16, 2024, 02:05:23 PM »

Hi,

This is the first MP566 I'm putting together.

I have two questions about some parts.

In the 'parts list' C4 is described as 22uF350v.
However, the (only 22uF) capacitor I received indicates 22uF315v.

R51 indicates 7R5 on the 'parts list', but when measuring I get 8R9.

Can I go ahead and just install both of these?

Thanks in advance!
Tom