Fantastic stuff, Will. I've no doubt that the final build will indeed be rather special. All power to you, my friend. You're a credit to AoS and today's electrical engineers. Hope you recover fully, and as soon as possible, from your illness.
Have a lovely Christmas
Marco.
Main System
Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & reg mods]. Funk Firm APM Achromat/Nagaoka GL-601 Crystal Record Weight/Isonoe feet & boots/Ortofon RS-212D/Denon DL-103GL in Denon PCL-300 headshell with Funk Firm Houdini/Kondo SL-115 pure-silver cartridge leads.
Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp/Denon AU-310 SUT.
Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.
CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.
Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new, by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.
Preamps: Heavily-modified Croft Charisma-X. LDR Stereo Coffee. Power Amps: Tube Distinctions Copper Amp fitted with Tungsol KT-150s. Quad 306.
Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.
Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.
Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.
Protect your HUMAN RIGHTS and REFUSE ANY *MANDATORY* VACCINE FOR COVID-19!
Also **SAY NO** to unjust 'vaccine passports' or certificates, which are totally incompatible with a FREE society!!!
Radford Revival
www.radfordrevival.co.uk
Work is ongoing - many design refinements have been made - especially to the drive circuitry. Each output valve is now driven by a 1Mhz bandwidth ultra-low distortion class A driver circuit - the wide bandwidth for technical reasons, not bragging rights.
The bias servo has also benefited from some refinements and simplifications, and the chassis design is also finally taking shape.
Radford Revival
www.radfordrevival.co.uk
Very much looking forward to seeing some pictures of the MA100 Will. Sounds like you are making steady and important progress with this project.
Chat soon. Please say "Hi" to your Dad. Hope you both keeping well.
Edward
Current: [P20] Roon/Tidal > Custom PC> Chevron Paradox NDF16 > Phast Pre > Neuro. 686 > Tannoy Berkley (RFC tweaks)
Getting much closer now, tentatively stating that this amp will be epic!
Radford Revival
www.radfordrevival.co.uk
More progress made, prototype mains transformers have arrived and PCBs nearing completion
Radford Revival
www.radfordrevival.co.uk
PCBs of the new version of the amp coming soon! The project is in fact coming together finally. Took a while but I have officially broken the back of it now. Watch this space.
Radford Revival
www.radfordrevival.co.uk