REDD47+RS127

[BOB42]

hello to all my name is BOB and I live in France
I did a lot of live sound and a little studio
I am very interested in tube audio equipment
especially with the REDD 47 preamp and RS127 EQ I would have questions about inserting the RS 127 into the REDD 47 to make it a preamp with EQ.
thank you

 

[rock soderstrom]

Hi Bob, welcome to GroupDIY!

Cheers

 

[TwentyTrees]

Salut Bob! Welcome to the board. There's been some discussion about the whole REDD47 + EQ idea recently - have a look here:
Redd. 47 preamp + Redd EQ

 

[ruffrecords]

It is good to have another tube enthusiast here. Welcome.

Cheers

Ian

 

[BOB42]

merci pour votre accueil

 

[BOB42]

thank you for your welcome

 

[BOB42]

Hello
to start making the REDD 47+REDD EQ
I would like to see the schematics and advancements of the REDD47 preamp with the built-in REDD EQ to get the most out of your combined experiences
I am passionate but I do not have your level.
thank you.

 

[ruffrecords]

Hello
to start making the REDD 47+REDD EQ
I would like to see the schematics and advancements of the REDD47 preamp with the built-in REDD EQ to get the most out of your combined experiences
I am passionate but I do not have your level.
thank you.

In simple terms it is a regular REDD47 (without the output transformer) fed into my passive REDD EQ followed by another ECC88 stage with output transformer for gain make up. More details are shown in the thread shown in post #3.

Cheers

Ian

 

[BOB42]

thank you
I'll summarize and come back to the forum

BOB

 

[BOB42]

I would like to know if I can replace the SOWTER 9970 input transformer with the UTC A1 transformer.
UTC A1 has 3 windings of 50-200 and 500 ohm inputs.
is it possible and how to have 5 levels of gain as on attached view?
I will publish the schematic for correction as soon as possible.
thank you
bob

 

[BOB42]

Hello
I would like to know if the insertion of the HPF is correct and if the 47K resistance of the filters is correct?
is it possible to replace the 9970 SAWER transformer with a UTC A11 transformer?
thank you
Bob

 

[TwentyTrees]

Hi Bob,

I can't help with your specific questions I'm afraid, but you might get more input if you ask them in the link in post #3 above, as it's a thread with quite some activity in a more relevant section of the forum.

Good luck!

 

[BOB42]

Hello
Attached is my REDD47+EQ approach diagram
according to your indication Ian
I would like your opinion on the exchange of transformer at the entrance
and placement and the resistive value of the HPF
Bob

 

[ruffrecords]

Hello
Attached is my REDD47+EQ approach diagram
according to your indication Ian
I would like your opinion on the exchange of transformer at the entrance
and placement and the resistive value of the HPF
Bob

Replied to in other thread.

 

[BoBoSan]

Replied to in other thread.

Hi Ian
A quick question in the REDD47 schematic I have the c1 8uF and c .47uF going to “E termination “
Is this going to ground ?

 

[ruffrecords]

Yes, they go to analogue 0V.

Cheers

Ian