Dumble Preamp (for SE amp)

[Kagliostro]

I would like to plan an SE amp using a GU50 (or 1625 as Power Tube)

Please can you point me to an ODS version that has good documentation to plagiarize the preamp schem and Layout part

There are so many versions of schematics and Layout that I'm a bit confused

Many Thanks

K

[Guy77]

I would like to plan a SE amp using a GU50 (or 1625 as Power Tube)

Please can you point me to an ODS version that has good documentation to plagiarize the preamp schem and Layout part

There are so many versions of schematics and Layout that I'm a bit confused

Many Thanks

K

Ciao Kagliostro. This SE ODS version was a huge hit.
https://ampgarage.com/forum/files/mts_mini_hrm_190.pdf

Special thanks to Colossal for the schematic

This is my 777 post do I win the jackpot LOL!

Cheers
Gaetano (Guy)

[Reeltarded]

Special thanks to Colossal for the schematic

This is my 777 post do I win the jackpot LOL!

Cheers
Gaetano (Guy)

93F75211-9E1E-48FE-A93C-5F376187F23C.jpeg

[Kagliostro]

Thanks Guy77

Is there a version of Layout I can use

I'm interested also if it is only about the preamp or a whole amp Layout from which I can borrow the preamp layout

---

Ooops ... Sorry Reeltarded

Pollo Arrosto.png

K

[TUBEDUDE]

Truly game over.

[Guy77]

Thanks Guy77

Is there a version of Layout I can use

I'm interested also if it is only about the preamp or a whole amp Layout from which I can borrow the preamp layout

---

Ooops ... Sorry Reeltarded


Pollo Arrosto.png


K

I won a chicken and its cooked! I needed a good laugh today and this did the trick! Thanks Reeltarded and Kagliostro!
Here is the link to the full post Kagliostro. Page 2 has a layout you can use.

https://ampgarage.com/forum/viewtopic.p ... rm&start=0


Cheers
Guy

[Kagliostro]

Ciao Guy77

https://ampgarage.com/forum/viewtopic.p ... rm&start=0

.... Page 2 has a layout you can use

Unfortunately on that page I can see only a Schematic



and a link to a pdf containing one other schematic

https://ampgarage.com/forum/download/file.php?id=11902

but I'm looking for a Preamp Layout

Thanks

K

[martin manning]

Page 3?

[Kagliostro]

Ciao Martin

Seems that something is at page 5

a Mini HRM Schem & Layout from 10thnx (I think he is Tubenit)





Thanks

Franco

[martin manning]

Yes, sorry.

[Kagliostro]

I'm quikly reading that thread and I've find something that is not favourable to me

https://ampgarage.com/forum/viewtopic.p ... 09#p120509

That preamp has not enough swing for a tube as 5881 and so I think the same for the GU50 or 1625 tubes

EL84 is in the order of 11.3mA/V, 1625 is around 6mA/V and GU50 only 3-5.5mA/V

may be a 6AV6 tube is to be inserted between the Preamp and the Power Tube if the Power Tube has a "low" mA/V rate

Franco

[TUBEDUDE]

Ciao Martin

Seems that something is at page 5

a Mini HRM Schem & Layout from 10thnx (I think he is Tubenit)





Thanks

Franco

Is anyone else curious about potential trouble
With the efx loop(breakout jacks) return feeding directly into the power tube without an internal grid ground reference? Or am I just overly pessimistic?

[TUBEDUDE]

Ciao Martin

Seems that something is at page 5

a Mini HRM Schem & Layout from 10thnx (I think he is Tubenit)





Thanks

Franco

Is anyone else curious about potential trouble
With the efx loop(breakout jacks) return feeding directly into the power tube without an internal grid ground reference or capacitive coupling? Or am I just overly pessimistic?

[martin manning]

I agree, I'd like a grid leak resistance there too.

[Kagliostro]

Switched pots used as grid leak resistor ?

Franco