When I first listened to DACs, I concluded quite quickly that ‘multi-bit’ DACs sounded more like music to me, than ‘bitstream’ DACs – more dynamic & ‘alive’.
The TDA1541 was originally developed by Philips (in 1985) as a high performance stereo DAC. The ‘A’ version was manufactured between 1989-1995. It was (is still?) regarded as one of the best sounding DACs ever made. This chip was used in almost 100 different CD players
This is our finalised DIY cleaner ‘kitset’ design.
It is a 3-piece ‘kitset’ designed for easy self-assembly, with only 4 screws.
An additional 3 screws attach a slow-rotating BBQ ‘rotisserie’ motor and the whole assembly fits neatly onto the top of a 6 Litre Ultrasonic Cleaner tank.
We all know that the small things matter in hi-fi. Especially at the front end of the audio system – eg. the pickup cartridge and tonearm.
Trans-Fi Terminator tonearm is constructed with a 6mm aluminium ‘L’ Mounting Plate. It’s machined shape and necessary slotted holes, no doubt reduce its structural and torsional rigidity.
Would there be energy loss?
I have to say that I’m a little bit excited about this right now…..
Over the past week, I have been testing vinyl records in an Ultrasonic cleaning machine and the results have been all positive.
In the past, I have used a Nitty Gritty record cleaning machine (RCM) and in recent years have acquired an old but well-respected Keith Monks RCM (below).
Pt I, next, the Amplifier boards are removed for modifications:
Reduce input gain by 50-60%, to suit higher output from modern digital sources (Roe MK2 and Takman REY metal film resistors, change values to increase feedback, output stage).
Replace electrolytic capacitors (Elna Silmic II).
Renew transistors (3 per channel, BC550).
The Quad 33 preamplifier is 50 years old, now.
It was introduced by Quad Electroacoustics in 1967 (to partner the 303 power amp) and 120,000 units were reportedly manufactured over 15 years.
The Quad 33/303 was Quad’s first Solid State consumer preamp/power-amp set.
My Quad 33 is serial no.6184, which means probably late 60s-early 70s manufacture.
In 1990, Stereophile’s Dick Olsher declared that the
AURA turntable offered:
…..borderline Class A performance….. I’m not letting the Aura out of my grasp. It’s one hell of a ‘table and one that I’d be perfectly happy with until the end of time.
In 2008, Dave Whittaker made his last AURA. Incorporating many improvements over 20+ years, his later AURAs