Turntable advice / opinion on setup / sound.

@richardbrand 

"As for knowing Roy did not have access to computer modelling from his get go, the date was around 1968.  Rega was not NASA.  I was working with state-if-the-art computing in the UK and it was very early days.  Arguably the world's first PC, the Olivetti Programma 101, had a memory capacity of 64 words.

My understanding was that Terry Bateman concentrated on electronics at Rega"

Hm, did I say from the get-go? When I hit the ground in the early eighties, I performed a quality control function that supported a staff of MIT educated engineers and a manufacturing floor that produced 80 mega bit (which was extremely fast at the time) local area network cards for the likes of Cray, Sun Microsystems, Data General, Digital Equipment Corp the US Government etc.. These extremely complex boards might have a hundred chips of various types in addition to passive components and were modeled on the PCs of the day using "computer modelling and finite element analysis" to design their extremely critical circuits. Nothing like the 2-bit variety you were using but still not the most sophisticated standalone platforms of the time and you think Terry Bateman wouldn't have had access to them to design his circuits? Seems a bit short sighted for an engineer. Did you work for British Leyland or something? Killed by a lack of forward thinking and among other things.

@faustuss 

Hm, did I say from the get-go?

No, I did

They (Wilson Benesch) have an advantage over Rega - they could use computer modelling and finite element analysis from the get-go

Unfortunately (for me) you started in the '80s a couple of decades after me.  The "2-bit variety" I cut my teeth on actually had 6-bit addressing - hence 64 memory locations.

Finite element analysis has nothing to do with electronics or circuit design. It is mainly used in structural analysis, for example to predict the crash performance of a car body, or the propagation of vibrations in a tonearm.  To do this, the overall mechanical structure is modelled as a mesh, and forces for each link in the mesh are modelled as differential equations which very powerful computers can solve.  The finer the mesh, the more accurate the results, but the more compute power you need.

When Australia had a car industry, the boffins at Holden used finite element analysis to design and crash test a ground-up design, the Commodore, and go to full production, without creating any physical prototypes.

In my opinion, the memory address restrictions in computers were suddenly blown away by the release in 1978 of the 32-bit Virtual Address eXtension (VAX) by Digital Equipment Corporation. It could directly address 4-gigabytes of virtual memory.  Back then real memory was still extremely expensive - I agonised whether the two VAX-11/780s I needed should have one megabyte of real memory, or one and a quarter.  Each computer needed several full-size cabinets.  Most Australian universities at that time could afford to acquire one VAX typically supporting 100 time-sharing users.

By 1985 almost the same performance and exactly the same architecture could be had from the MicroVAX II, with a single-chip cpu, a cabinet you could carry and a price tag smallish companies could afford.  You could hook dozens of them up with your Ethernet cards and make a passable supercomputer.  But this was well after Rega was founded.

Did you work for British Leyland or something? Killed by a lack of forward thinking and among other things

I don't think British Leyland was killed by lack of forward-thinking engineers.  You only have to think of the Mini, which set the design parameters for almost every small car produced today - front-wheel drive, east-west engine, wheels at the corners. Then its bigger brothers, with Citroen-like suspension but without the expensive pumps, the 1100 and 1800.

In my opinion, it was killed by the difficulty of successfully managing mergers and acquisitions.  The heads of Morris and Austin had been fierce rivals, then were supposed to cooperate.  Add rivals Triumph and innovative Rover to the mix.  And try to make it work in a class-riddled country plagued with industrial disputes.

@richardbrand 

"Finite element analysis has nothing to do with electronics or circuit design. It is mainly used in structural analysis, for example to predict the crash performance of a car body, or the propagation of vibrations in a tonearm."

Oh please! It's just CAD with some proprietary modules tweaked for your particular application. The Commodor, is that the one that was crash tested into a fixed barrier at 35 MPH and the whole structure collapsed from stem to stern?

"In my opinion, the memory address restrictions in computers were suddenly blown away by the release in 1978 of the 32-bit Virtual Address eXtension (VAX) by Digital Equipment Corporation. It could directly address 4-gigabytes of virtual memory.  Back then real memory was still extremely expensive - I agonised whether the two VAX-11/780s I needed should have one megabyte of real memory, or one and a quarter.  Each computer needed several full-size cabinets.  Most Australian universities at that time could afford to acquire one VAX typically supporting 100 time-sharing users."

Yes, the 11/780 was the first main frame we chose to run ASK/MANMAN which was a material requirements planning software and that was all it could do for us. I was very influential during the implementation which gave me a broad view of a manufacturing environment from concept, engineering documentation, inventory control, WIP through finished goods, procurement, accounts receivable and general ledger.

The cards we produced were based on a unique at the time star shaped token ring topology and our engineering staff relied on the technology to integrate all of their standalone workstations and servers which also acted as a beta site for what they were developing. They could also interface with our MRP software to create indented bills of materials it required, engineering change orders and other necessary documentation to get a product through WIP to finished goods. As for the numerous available ports the VAX was still extremely slow. I would run my usual utilities and immediately swamp it's CPU bringing all other administrative functions to a complete halt throughout the company.

Regarding memory ROM and RAM (we were also implementing VLSI in one our products at time) was becoming more efficient but if we weren't relying on 3 or 5 inch floppies or cassettes it was large tape drives or multi-tiered disc drives. Wasn't long though we outgrew the 11/780 and acquired the capital to lease one of DEC's larger, faster and more reliable models, I think 7800 series or something. Still had the same problems with utilities though.

Interestingly, the technology we were developing in very short time supplanted main frames all together and a lot of the companies that thrived in our area, Wang, Digital, Data General, Prime and others went out of business and startups in the main frame arena like Sequoya never had a chance. 

"I don't think British Leyland was killed by lack of forward-thinking engineers."

It was also government ownership (or maybe Margret spun it off by then) and a joint venture with Honda to build the Sterling which all BL had to do was stamp and unit weld the body panels together and assemble all the parts and ancillaries Honda provided them and they still couldn't pull it off, hence the car was a complete disaster. Don't know how they saved Rover though, they were also certainly building crap at the time.

@faustuss 

Re your comment that Finite Element Analysis is

just CAD with some proprietary modules

That’s like saying word processing and spreadsheets are the same because Word and Excel are part of Office, or the differences between the Qu’ran and the Bible don’t matter because they are both books!

The Commodor(e), is that the one that was crash tested into a fixed barrier at 35 MPH and the whole structure collapsed from stem to stern?

I’ve not heard that story! The Holden Commodore VE and VF series, which were the Australian ones designed and built using CAD/CAM, were the biggest selling vehicle in Australia, and in their performance versions one of the world’s fastest 4-door cars.  They were exported to the USA as police pursuit vehicles.

star shaped token ring topology

Token Ring was touted by IBM as an alternative to Ethernet.  All audiophiles know the outcome of that little struggle. The idea is that you can only transmit if you have the magic token, which is passed from one device to the next in a ’ring’. Problem is that the token stops if a device drops out. Solution: have a central controller and make the ring star-shaped with the controller in the middle. But what happens if the controller fails? A contemporary quote went along the line "if Bell made the telephone network like an IBM network, everybody would have to hang up before you could add a subscriber".

Interestingly, the technology we were developing in very short time supplanted main frames all together and a lot of the companies that thrived in our area, Wang, Digital, Data General, Prime and others went out of business and startups in the main frame arena like Sequoya never had a chance. 

Really!  You are dreaming. Before the VAX (a minicomputer), computing was dominated by mainframes from IBM and the BUNCH - Burroughs, Univac, NCR, Control Data Corporation and Honeywell.  The VAX success grew Digital into the second biggest computer company in the world. I had to wait 18 months to get mine.  The boss of Data General is on record saying he was happy for his company to survive on the orders Digital could not fill!

The VAX architecture remained in production for an astonishing 23 years until supplanted by the 64-bit Alpha design. Digital found it easy to make slower versions of the original 11/780 but very hard to make one much faster.  If they added boards, it slowed communication between the boards.  The 11/780 was their main game for six years, an astounding time in computing. They did eventually produce the mainframe-class 6000 and 9000 models, but the real breakthrough in performance was the single-chip MicroVAX models.  Some they speeded up simply by reducing the photolithography used to print the circuits on the chips, so the electrons had less distance to travel.

Meanwhile, the BUNCH was dying. I remember a full-page advert in the Australian newspaper urging VAX users to trade in against Control Data Corporation’s new Cyber series.  I thought it was such a joke that I hung the ad in my office.  But it turned out it was not a joke.  I later met the guy behind the campaign, which he claimed was highly successful.  They got two genuine enquiries wanting to buy traded-in VAXes. Control Data had realised the game was up, and were moving to hardware maintenance for VAX computers and needed spare parts!

By the way, the dreadful corporate history of British Leyland never involved nationalisation, although the government did briefly become the major shareholder with a controlling interest.

I was working in the steel industry and genuinely did get nationalised. 25% instant pay rise, too.  Did not compete with becoming a ten pound pom though.

@richardbrand 

"That’s like saying word processing and spreadsheets are the same because Word and Excel are part of Office, or the differences between the Qu’ran and the Bible don’t matter because they are both books!"

The point is that such tools have been accessible and at low cost for a very long time.

"I’ve not heard that story! The Holden Commodore VE and VF series, which were the Australian ones designed and built using CAD/CAM, were the biggest selling vehicle in Australia, and in their performance versions one of the world’s fastest 4-door cars.  They were exported to the USA as police pursuit vehicles."

Here ya go.

https://youtu.be/CgjtSilW8yM?si=5vGTfNF-nXmiG4Ml

"Some they speeded up simply by reducing the photolithography used to print the circuits on the chips, so the electrons had less distance to travel."

Around that time, they also learned how to use copper instead of aluminum as a base material. Said to have improved performance quantifiably.

"The VAX architecture remained in production for an astonishing 23 years until supplanted by the 64-bit Alpha design."

The hardware was only in production eleven years though support for the platform probably continued do to the fact that the lease's were still obligated to their initial investment.

The "Alpha" design had a short reign as shortly after Digital's manufacturing was acquired by Compaq and it's intellectual property by Intel where the "Alpha" was incorporated and marketed as Pentium. Subsequently, Compaq succumbed due to poor management and internal squabbling and was acquired by Hewlitt Packard.

"Token Ring was touted by IBM as an alternative to Ethernet.  All audiophiles know the outcome of that little struggle. The idea is that you can only transmit if you have the magic token, which is passed from one device to the next in a ’ring’. Problem is that the token stops if a device drops out. Solution: have a central controller and make the ring star-shaped with the controller in the middle. But what happens if the controller fails? A contemporary quote went along the line "if Bell made the telephone network like an IBM network, everybody would have to hang up before you could add a subscriber"."

Ethernet certainly usurped Token Ring but Local area Networks have become the rule instead of the exception.

"Before the VAX (a minicomputer), computing was dominated by mainframes from IBM and the BUNCH - Burroughs, Univac, NCR, Control Data Corporation and Honeywell."

The olden days.

"Before the VAX (a minicomputer)"

It was still a sizable chunk of hardware and required constant internal and outside support to keep it functioning properly and the users happy.