Phono RIAA amplifiers

qsxm3

Started by yiancar

Pages1 2 3 4

Replies: 55
Views: 33,082

November 02, 2013, 07:41:46 PM
by peranders

QSXM2 problem

Started by zayance

Pages1 2 3

Replies: 39
Views: 23,199

January 30, 2021, 11:15:40 AM
by peranders

Serious imbalance with SSM Version

Started by Cel

Pages1 2

Replies: 25
Views: 18,153

December 31, 2014, 09:07:17 AM
by peranders

QSX03 A new RIAA amp with passive RIAA correction

Started by peranders

Pages1 2

Replies: 23
Views: 35,645

March 04, 2023, 09:05:31 AM
by goldkenn

QSXM3 hum problems

Started by peranders

Pages1 2

Replies: 18
Views: 17,632

April 11, 2006, 11:58:37 AM
by peranders

input bias servo with OP177FPZ

Started by fantast

Pages1 2

Replies: 16
Views: 15,902

December 31, 2011, 07:21:52 PM
by peranders

QSXM2 troubleshooting!!

Started by W1DAN

Pages1 2

Replies: 16
Views: 11,244

February 13, 2021, 01:57:44 AM
by W1DAN

newbie in QSXM2 , just received PCB

Started by Edmund Chan

Pages1 2

Replies: 15
Views: 15,991

June 22, 2010, 02:29:02 PM
by Edmund Chan

QSXM2 - various debugging

Started by tk-don

Replies: 13
Views: 12,466

June 08, 2015, 09:36:21 PM
by tk-don

QSXM3 Noise Floor Or Hum

Started by goldkenn

Replies: 9
Views: 10,679

August 18, 2010, 12:55:04 PM
by goldkenn

QSXM2 - BOM questions, etc.

Started by tk-don

Replies: 8
Views: 10,316

March 02, 2014, 08:40:54 AM
by peranders

Transistor select for QSXM2

Started by horvlas

Replies: 6
Views: 10,761

August 09, 2012, 06:36:17 PM
by peranders

How To Change Gain For QSXM2 and QSXM3

Started by goldkenn

Replies: 6
Views: 9,868

March 07, 2011, 06:22:26 AM
by peranders

Ribbon microphone

Started by roberto.missoli

Replies: 6
Views: 9,280

November 14, 2011, 09:59:26 PM
by peranders

QSXM2 doubt

Started by gianluca

Replies: 6
Views: 9,090

October 28, 2009, 11:28:10 AM
by peranders

QSXM3 with LTC1050 servo?

Started by Brambus

Replies: 6
Views: 13,125

January 21, 2018, 12:03:46 PM
by Nugman

QSXM2: Start preparing!

Started by goldkenn

Replies: 6
Views: 7,916

October 25, 2009, 04:31:13 PM
by goldkenn

Replacement, Operational Amplifier DIL-8, MAX420EPA+

Started by zz1969

Replies: 5
Views: 9,844

February 05, 2014, 10:39:03 PM
by peranders

QSXM2: Greetings from Germany / Bulgaria!

Started by sinigersky

Replies: 5
Views: 8,286

April 16, 2007, 06:55:52 AM
by peranders

QSXM2 balance output

Started by gianluca

Replies: 5
Views: 8,308

September 03, 2007, 07:07:32 PM
by peranders

Critical transistors in QSXM2

Started by fantast

Replies: 5
Views: 8,871

January 08, 2012, 08:52:25 PM
by fantast

SYMMETRICAL CARTRIDGE-CONNECTION

Started by roberto.missoli

Replies: 5
Views: 8,541

December 13, 2008, 08:59:06 PM
by peranders

QSXM3 build check

Started by goldkenn

Replies: 4
Views: 6,517

October 19, 2009, 07:51:43 PM
by goldkenn

Cool QSXM3

Started by VesaK

Replies: 3
Views: 8,406

March 16, 2015, 04:26:43 PM
by peranders

EMI filter MuRATA 10nF/100V Max 6A

Started by gipione

Replies: 3
Views: 8,079

March 16, 2013, 07:42:14 AM
by peranders

Question about QSXM2, regarding our email conversation

Started by goldkenn

Replies: 3
Views: 7,417

February 19, 2010, 01:22:34 PM
by peranders

QSXM2, separate PSU ?

Started by Goofy

Replies: 3
Views: 7,052

November 05, 2017, 05:39:35 PM
by peranders

Obsolete MAX420

Started by wopo

Replies: 2
Views: 6,587

October 18, 2009, 03:12:56 PM
by goldkenn

QSXM2 questions.

Started by zz1969

Replies: 2
Views: 7,424

October 08, 2013, 08:30:13 PM
by fantast

QSXM2 - The Swiss Cheese

Started by DFM

Replies: 2
Views: 7,602

February 17, 2007, 05:40:37 PM
by DFM