[BC] Noisy transmitters - was VP-50 vapor Phase and stuff.

[PeterH5322@aol.com]

In a message dated 1/3/06 3:07:57 PM, DG19075 at aol.com writes:


> I had Rotrons in 2 of the stations I've worked at.
> 

My former employer, one of the IBM-compatible mainframe computer 
manufacturers ... in fact, the FIRST IBM-compatible mainframe manufacturer ... used 
ROTRON? Tarzan? fans in a push-pull configuration, in laminar flow mode, to achieve 
air cooling of a mainframe which consumed 70 KVA in its standard configuration 
and 140 KVA in its maximum configuration.

Each of numerous vertical columns of multichip carrier assemblies were 
provided with a pusher and a puller Tarzan. In a standard configuration, there were 
46 such assemblies.

Laminar flow, as contrasted with turbulent flow, contributed to low 
acoustical noise generation and to very efficient heat transfer. This, while our main 
competitor had been using water cooling for decades.

Our next generation also utilized laminar flow, but at about four times the 
gate density, and at about four times the power density, although this was a 
planar design, not a columnar design.

It helped to have a good mechanical engineering department in-house, and a 
former physicist who ran the company and who was the "idea man" behind the 
cooling system design.

(He also designed this architecture, which IBM has been using for the last 
forty-two years).

Sadly, he got shunted aside, left with only about three percent of the shares 
of the company he founded, the venture capitalist geeks and crooks taking 
most of the shares, ultimately selling out to an Asian company eager to gain a 
foothold into the seemingly insatiable US marketplace.

The company is now a ghost, and the original trademark has been retired, 
being replaced with a name and a logo more reminiscent of a birth-control product 
than a world-class mainframe computer product.

My, my, my, my, my ... to quote Ray Taliaferro, KGO AM 810's 1 am to 5 am 
host.