acannan

I've recently been learning about superhet and frequency mixing and wanted to start tinkering. Specifically I'd like to try using two heterodynes in series to first frequency shift then uninvert the original audio, sort of like an analog frequency shifter.

To do this, I'd need a frequency mixer. I've been looking at a ring modulator (like https://upload.wikimedia.org/wikipedia/commons/1/1b/Diode_DBM.png) which should require 4 shottky diodes and 2 center-tapped transformers. I've had difficulty locating an affordable transformer, with good enough fidelity for audio, that also includes a center tap.

I have a few questions:

• Where can I locate affordable, good-enough-for-audio transformers?
• Is the ring mod approach good enough? I see there's also a gilbert cell.
• Any general advice for someone just starting a project like this?

Thanks!

What's on your mind?

~posted~ ~by~ ~lfcbot~

Match Info

Round: Premier League Regular Season - 38

Referee: C. Kavanagh

Ground: Anfield, Liverpool

Date: May 19, 2024

Kickoff time: 15:00 UTC

Lineups

                   Luis Díaz, Cody Gakpo, Mohamed Salah

             Alexis Mac Allister, Wataru Endo, Harvey Elliott

Andrew Robertson, Virgil van Dijk, Jarell Quansah, Trent Alexander-Arnold

                                 Alisson

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~posted~ ~by~ ~lfcbot~

Match Info

Round: Premier League Regular Season - 37

Referee: S. Hooper

Ground: Villa Park, Birmingham

Date: May 13, 2024

Kickoff time: 19:00 UTC

Lineups

               Luis Díaz, Cody Gakpo, Mohamed Salah

         Alexis Mac Allister, Wataru Endo, Harvey Elliott

Joe Gomez, Virgil van Dijk, Jarell Quansah, Trent Alexander-Arnold

                             Alisson

Bench: Caoimhin Kelleher, Conor Bradley, Ibrahima Konaté, Konstantinos Tsimikas, Dominik Szoboszlai, Ryan Gravenberch, Stefan Bajčetić, Curtis Jones, Darwin Núñez

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Liverpool

D 🟡 [2-2] at Manchester United
L 🔴 [0-3] vs Atalanta
L 🔴 [0-1] vs Crystal Palace
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W 🟢 [3-1] at Fulham
L 🔴 [0-2] at Everton
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W 🟢 [4-2] vs Tottenham

~posted~ ~by~ ~lfcbot~

Match Info

Round: Premier League Regular Season - 36

Referee: P. Tierney

Ground: Anfield, Liverpool

Date: May 05, 2024

Kickoff time: 15:30 UTC

Lineups

                   Luis Díaz, Cody Gakpo, Mohamed Salah

             Alexis Mac Allister, Wataru Endo, Harvey Elliott

Andrew Robertson, Virgil van Dijk, Jarell Quansah, Trent Alexander-Arnold

                                 Alisson

Bench: Caoimhin Kelleher, Ibrahima Konaté, Conor Bradley, Joe Gomez, Dominik Szoboszlai, Curtis Jones, Ryan Gravenberch, Stefan Bajčetić, Darwin Núñez

Recent Form

Liverpool

W 🟢 [3-1] vs Sheffield Utd
D 🟡 [2-2] at Manchester United
L 🔴 [0-3] vs Atalanta
L 🔴 [0-1] vs Crystal Palace
W 🟢 [1-0] at Atalanta
W 🟢 [3-1] at Fulham
L 🔴 [0-2] at Everton
D 🟡 [2-2] at West Ham

Tottenham

W 🟢 [4-0] at Aston Villa
L 🔴 [0-3] at Fulham
W 🟢 [2-1] vs Luton
D 🟡 [1-1] at West Ham
W 🟢 [3-1] vs Nottingham Forest
L 🔴 [0-4] at Newcastle
L 🔴 [2-3] vs Arsenal
L 🔴 [0-2] at Chelsea

~posted~ ~by~ ~lfcbot~

What's on your mind?

~posted~ ~by~ ~lfcbot~

Match Info

Round: Premier League Regular Season - 35

Ground: London Stadium, London

Date: Apr 27, 2024

Kickoff time: 11:30 UTC

Lineups

                  Luis Díaz, Cody Gakpo, Harvey Elliott

            Ryan Gravenberch, Wataru Endo, Alexis Mac Allister

Andrew Robertson, Virgil van Dijk, Jarell Quansah, Trent Alexander-Arnold

                                 Alisson

Bench: Caoimhin Kelleher, Joe Gomez, Konstantinos Tsimikas, Ibrahima Konaté, Curtis Jones, Dominik Szoboszlai, Stefan Bajčetić, Mohamed Salah, Darwin Núñez

Recent Form

West Ham

D 🟡 [1-1] vs Aston Villa
L 🔴 [3-4] at Newcastle
D 🟡 [1-1] vs Tottenham
W 🟢 [2-1] at Wolves
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Liverpool

W 🟢 [2-1] vs Brighton
W 🟢 [3-1] vs Sheffield Utd
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L 🔴 [0-3] vs Atalanta
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~posted~ ~by~ ~lfcbot~

Match Info

Round: Premier League Regular Season - 29

Referee: A. Madley

Ground: Goodison Park, Liverpool

Date: Apr 24, 2024

Kickoff time: 19:00 UTC

Lineups

                  Luis Díaz, Darwin Núñez, Mohamed Salah

          Alexis Mac Allister, Dominik Szoboszlai, Curtis Jones

Andrew Robertson, Virgil van Dijk, Ibrahima Konaté, Trent Alexander-Arnold

                                 Alisson

Bench: Caoimhin Kelleher, Joe Gomez, Konstantinos Tsimikas, Jarell Quansah, Ryan Gravenberch, Bobby Clark, Jayden Danns, Wataru Endo, Harvey Elliott

Recent Form

Everton

D 🟡 [1-1] at Brighton
L 🔴 [1-3] vs West Ham
L 🔴 [0-2] at Manchester United
L 🔴 [1-2] at Bournemouth
D 🟡 [1-1] at Newcastle
W 🟢 [1-0] vs Burnley
L 🔴 [0-6] at Chelsea
W 🟢 [2-0] vs Nottingham Forest

Liverpool

W 🟢 [2-1] vs Brighton
W 🟢 [3-1] vs Sheffield Utd
D 🟡 [2-2] at Manchester United
L 🔴 [0-3] vs Atalanta
L 🔴 [0-1] vs Crystal Palace
W 🟢 [1-0] at Atalanta
W 🟢 [3-1] at Fulham

~posted~ ~by~ ~lfcbot~

What's on your mind?

~posted~ ~by~ ~lfcbot~

Match Info

Round: Premier League Regular Season - 34

Referee: C. Pawson

Ground: Craven Cottage, London

Date: Apr 21, 2024

Kickoff time: 15:30 UTC

Lineups

                    Luis Díaz, Diogo Jota, Cody Gakpo

              Ryan Gravenberch, Wataru Endo, Harvey Elliott

Andrew Robertson, Virgil van Dijk, Jarell Quansah, Trent Alexander-Arnold

                                 Alisson

Bench: Caoimhin Kelleher, Ibrahima Konaté, Joe Gomez, Konstantinos Tsimikas, Alexis Mac Allister, Dominik Szoboszlai, Curtis Jones, Mohamed Salah, Darwin Núñez

Recent Form

Fulham

W 🟢 [2-1] at Manchester United
W 🟢 [3-0] vs Brighton
L 🔴 [1-2] at Wolves
W 🟢 [3-0] vs Tottenham
D 🟡 [3-3] at Sheffield Utd
L 🔴 [1-3] at Nottingham Forest
L 🔴 [0-1] vs Newcastle
W 🟢 [2-0] at West Ham

Liverpool

W 🟢 [6-1] vs Sparta Praha
W 🟢 [2-1] vs Brighton
W 🟢 [3-1] vs Sheffield Utd
D 🟡 [2-2] at Manchester United
L 🔴 [0-3] vs Atalanta
L 🔴 [0-1] vs Crystal Palace
W 🟢 [1-0] at Atalanta

~posted~ ~by~ ~lfcbot~

Match Info

Round: UEFA Europa League Quarter-finals

Ground: Gewiss Stadium, Bergamo

Date: Apr 18, 2024

Kickoff time: 19:00 UTC

Lineups

Check back 15m before kickoff

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Atalanta

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Liverpool

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W 🟢 [6-1] vs Sparta Praha
W 🟢 [2-1] vs Brighton
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D 🟡 [2-2] at Manchester United
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L 🔴 [0-1] vs Crystal Palace

~posted~ ~by~ ~lfcbot~