Valve Itch phono

[merlin el mago]

diyAudio is a great forum, plenty of kind people like you Salas always helping the others with the projects.

Itch is a top notch valve phono amp.

Congrats to you and for making and to the members for being helpful to each other

Was and long and winding road...

 

[Salas]

I guess it plays well The Beatles also 🙂

 

[merlin el mago]

Yup😉

 

[gatisozo]

The Itch can adequately amplify HiMC or MM cartridges but not MC without SUT or active pre pre like this

OK, thank you for answer Salas! And for MM? Any solution without SUT, cause high costs? Have an Empire 999 from 1971.

 

[merlin el mago]

OK, thank you for answer Salas! And for MM? Any solution without SUT, cause high costs? Have an Empire 999 from 1971.

Answered here Salas post 3179 Valve Itch phono

 

[Salas]

MM and HiMC can be connected directly to the Itch without any SUT or Pre-Pre. It gives 45dB voltage gain at 47k input load when driven directly. That's stated on the schematic also. You just delete the SUT from the schematic and its simply an MM phono.

 

[gatisozo]

MM and HiMC can be connected directly to the Itch without any SUT or Pre-Pre. It gives 45dB voltage gain at 47k input load when driven directly. That's stated on the schematic also. You just delete the SUT from the schematic and its simply an MM phono.

Thank you Salas! That encourage to start me to build up the itch 😉

 

[merlin el mago]

Good luck with your building.

 

[gatisozo]

Good luck with your building.

Thanks 🙂, any suggestions about 260vac transformer?

 

[merlin el mago]

I use Lundhal LL1683 250VAC

 

[gatisozo]

I use Lundhal LL1683 250VAC

sounds good. The same for filaments as well or they are saparate?

 

[merlin el mago]

The same Lundhal for all Itch.

 

[gatisozo]

The same Lundhal for all Itch.

ok, and what you are using for maida 300v? Planning for test to use varistor and replace them later to...?

 

[merlin el mago]

I use SSHV2

 

[gatisozo]

I use SSHV2

sorry, but what means SSHV2?

 

[merlin el mago]

Salas shunt high voltage regulator version 2 Simplistic Mosfet HV Shunt Regs

 

[gatisozo]

Salas shunt high voltage regulator version 2 Simplistic Mosfet HV Shunt Regs

perfect, thank you!

 

[gatisozo]

Hi!
Started planning of prototype in cookie's box. 🙂
I'm planning to use NOS silver micas. So, the question, anybody have an experience with heat for such parts?

 

[Salas]

Those USSR metal boxed capacitors hold reasonably well in valve builds

 

[The Space Egg Corp]

Back In The U.S.S.R. ... Baby !

Lookin' good Gatisozo.


I have some Ruskie metal-canned polystyrene capacitors ...

... they are THE ONLY bits which remain stable ! 😉


I think those silver-micas are a GREAT choice for 'The Itch' E.Q.

I want some ! 😀

😱

Si.

.