Wednesday, April 28, 2010

Revision of a Quad 520f

›
The Quad 510 and 520 were the first professional current dumping amplifiers. Produced from 1984 until 1995. Production numbers: Qua...
4 comments:
Sunday, March 21, 2010

A fully restored 33 set

›
A beautiful 33 set, consisting of a 33, FM2, FM3, AM3, 303 and two 50 E amplifiers. Take a look at the Thorens SME combination and the B...
1 comment:
Monday, March 08, 2010

Fixing Worn or Cracking Potentiometers, Switches and Connectors

›
Kontakt Chemie explains on their Website how to repair old and worn out Potentiometers, Trimmers, Switches, Contacts or Connectors. As Vint...
3 comments:
Sunday, February 21, 2010

Revised Quad FM3 Service Notes, nov 2010

›
Quad produced some 50,000 FM3 tuners between 1971 and 1982. So there are plenty of units out there, so it is well worth while developing a s...
7 comments:
Wednesday, February 10, 2010

Quad 33 with s/n 1067

›
Andreas from Vienna has one of the very first 33's on his working-table for a revision with the Dada Electronics 33-kit. The first 33...
1 comment:
Sunday, January 10, 2010

Revox Manuals can be downloaded now

›
A collection of the "Most Wanted" Revox User Manuals and Service Instructions are available in pdf-format in the Download section ...
Friday, January 08, 2010

Extra repair/mod information concerning the Quad 44

›
Correction for the 7815 pin layout!!! In the first series of the 44 (before serial 12.000) the output mute relay was fitted on the tone cont...
15 comments:
Monday, December 28, 2009

Dual Mono PSU & Velleman K4700 in a Quad 405

›
Joost built a Velleman K4700 Loudspeaker-protection kit in a Quad 405 with a Dada Electronics Dual Mono Power-supply . As there is no...
2 comments:
Thursday, December 03, 2009

Quad 306 - 606 Monoblock & Virtual Earth

›
Corected version 20-02-2010 A Quad 303 or 405 power-amplifier can be easily converted to a parallel monoblock that will deliver more power ...
5 comments:
Friday, November 27, 2009

The secret project

›
Some pictures of my own project, a stereo Bi- Amping amplifier based on the DaDa JPE modules. You see four 405 modules, two double power sup...
3 comments:
Wednesday, September 30, 2009

Changing the Online - Shop

›
Dada Electronics has replaced the Ebay-shop by their own Webshop . The Quad Dada Electronics Upgrade-kits and High-end boards will still be...
Saturday, September 26, 2009

Thierry Martin's Vintage collection

›
One of the nicest collections of Vintage Hifi in mint condition I have ever seen belongs to Thierry Martin in France. This is a must see! Cl...
Friday, June 26, 2009

Impedance of Quad ESL's and Monoblocks

›
The original ESL was a notorious hard to drive loudspeaker. See the graph from Sheldon Stokes. A low impedance at around 10 Khz and of highl...
2 comments:
Wednesday, May 27, 2009

Dada Electronics & Elektor

›
Elektor is the leading international editor for the professional electronics engineer and the hobby-electronician. Dada Electronics is now ...
Thursday, April 16, 2009

4 pole capacitors

›
The idea came from a request from a customer to mount Jensen 4 pole capacitors on our 405 dual mono power-supply board. This was not possibl...
1 comment:
Saturday, March 14, 2009

Quad 606 Transformer Swap

›
François' (Besancon, France) Quad 606-1 started making a rumbling sound.... Some QUAD 606 MK1's start to make a rumbling sound after...
4 comments:
Wednesday, March 04, 2009

Hum

›
Most of the hum problems are related to “earth” loops in external cabling systems. Input "hum" can arise from small ground potenti...
11 comments:
Monday, February 23, 2009

New release of the 34 - 306 - 606 Upgrade manuals

›
After several hundreds of upgrade-projects by our customers who used the Dada kits we released the next step, based on the feedback and the ...
2 comments:
Thursday, January 01, 2009

Dada Loudspeaker Protection & Delay pre-announcement

›
The Loudspeaker protection / Delay is available in the Dada Electronics Webshop here . Dada Electronics and JP Engineering are proud to pre ...
5 comments:
Thursday, December 25, 2008

High-end Audio-grade Opamps available again...

›
Dada Electronics has the hard-to-find High-end Audio-grade Opamps in stock again. Click on the links for pricing - quantity - datasheet fro...
2 comments:
Sunday, December 07, 2008

Quad Power-supply design generations: pro & contra.

›
Second edited version 3 june 2010 , thanks Peter! Some thoughts about the design of the power supply in the 606 till 909 series. Quad introd...
1 comment:
Thursday, September 25, 2008

405 in the air

›
Justin Wood (UK) used the Dada 44 and 405 kits to upgrade his Quads. He wrote: Thought you might like the photo below... Perhaps the first t...

Trying out the 1-day Quad revision...

›
The eternal problem with a Quad-revision is the transport. A 405 has a weight of around 10 kg, a 606 even more... So it is expensive to send...
1 comment:
Wednesday, September 24, 2008

OPA134 pin 8 in Quad revisions / upgrades

›
When using a Burr Brown OPA134 opamp for revising / upgrading Quad amplifiers like the 34 and the 306 make sure Pin 8 is connected to nothin...
1 comment:
Saturday, September 20, 2008

Marcos Di Paolo uses a 303 with Dada's High-end boards

›
Marcos is one more professional musician who has chosen Dada's High-end boards in his studio for their excellent transparency and natur...
Friday, September 19, 2008

Current Limiter in the Quad 405 and other limiters.

›
We decided to implement the 405-II current-limiters on request only. We have built the limiters with normal components. If you insist on hav...
Wednesday, September 17, 2008

Dada's 405 High-end boards

›
We had our new High-end boards photographed by Photology.net . Click on the pictures to enlarge. Stefaan
1 comment:
Wednesday, August 27, 2008

Dada Electronics wants to buy your old Quad boards.

›
When you buy one of the new Dada 405 High-end boards with OPA604 or with OPA627 -chips we will buy your old 405 PCB-board, even if it's ...
1 comment:
Friday, August 22, 2008

Elias from Cyprus upgraded his 303 with the Dada kit.

›
Elias writes: " Some time ago I realised that I had to, at least replace, all the electrolytic capacitors in my Quad 303 power amplifi...