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ArthurDent

Annual MAC DIY on show

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Annual MAC DIY on show

8pm Wednesday 14th December, visitors welcome.

Willis Room, City of Whitehorse Offices
Maroondah Highway (Whitehorse Road), Nunawading
Melway Map 48 Ref G9
Contact: 9437 1249

 

It's that time of year again when the DIY group get to show off their Hi Fi projects at the December General Meeting. It looks like another busy year for the group as they have managed to put together three systems for the night.

 

Our first presenter will be doing a short Master Class, his topic: Repairing Quad ESL63s. The talk will basically be about the pitfalls involved in repairing ESL63s, as well as a practical demonstration with some faulty panels, then finishing off with a music presentation with a pair of DIY Q405 amplifiers.

 

The other two systems will be showcasing the opposite ends of amplifier design. One will be a classic valve amplifier that uses KT150 tubes with a 60w/channel output, the other, a solid state Class D design that puts out 75W into 8ohms. Both have been designed from the ground up, with a no compromise approach when it came to parts and circuit design.

 

The program for the night will run the same as last year. All three systems will be demonstrated before the coffee break. With each system having an allotted time of no more than 30 minutes. Each presenter will get to explain their gear and play some music. This should see us finish the program well before 10:00pm, allowing all the members on the night to hear the three systems.

 

The earlier ending to the night's program will give us a chance to ask the talented DIY presenters about their projects. We all know how passionate our members can be when it comes to building their own equipment. See you on the night.

 

Nick Karayanis

Program Co-ordinator

 

Ken Tripp
Wise and Wonderful Webmaster
Melbourne Audio Club, Inc.

http://www.melbourneaudioclub.org.au

Edited by KenTripp

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Live repairs of Quads! Get the fire extinguishers ready!

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The Class-D amp being demonstrated on the night is my TPA3251 design, as described in the DIY forum here.

It will be partnered with my own solid-state preamp, based on LM4562 opamps. Nothing flash, but a lot of care was taken on the PCB layout to make sure it's 'opamps done right'.

 

The speakers are my bamboo bookshelf 2-ways, with SEAS drivers. They may find the large Willis room a little challenging but should put on a decent show.

 

Source is an Oppo BD-105 playing a mix of CDs and streaming off a USB drive.

 

Cheers,

 

Alistair..

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Have you ever wanted to know how to fix an ESL. Come along tonight and find out.

 

moggy1.jpg

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Not my pics
2016diy1.jpg
2016diy2.jpg
2016diy3.jpg
2016diy4.jpg
2016diy5.jpg

Thanks for the pics mate. If anyone has any more, I for one, would like to see them.

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