Jeg trakk fram emulatorer slik at Retep kunne få en opplevelse av hvordan rørlyd kan låte. Skrev aldri at det låt identisk med en fysisk rørforsterker.
Men når det er sagt, så har Bob Carver for lenge bevisst at det er mulig å etterligne lyden i en rørforsterker med en transistor. Han kopierte en meget kostbar Conrad Johnson rørforsterker med en relativt rimelig transistor, slik at ingen klarte å skille de en blindtest.
The Carver Challenge | Stereophile.com
Er det noen som leste denne fra Stereophile?
Den burde kanskje vært ledsaget av varseltrekant: "Fare! Dreper livsløgner".
Jaja. Vi som har fylgt med
sprella til Bob Carver vart ikkje så veldig uroa no.....
Det er mer penger i dyrere utstyr.
Sikkert sant.
Elles fortel Bob ymse. Henta frå nettet (
Carver 350 Watt Stereo Monoblock Tube Amp Amplifier | eBay
"Tim de Paravicini and me
It was many summers ago that Tim de Paravicini and I met in a small town (Sebastopol) in California. We spent three fascinating days discussing vacuum tube power amps and the magic of our mechanical vinyl recording system that somehow, against all odds, is able to deliver music with life and romance that no other system can.
We talked about output stages, phase inverters, front end amplifiers, output transformers, and especially the dynamic characteristics of tube amplifiers playing music.
I will never forget those fascinating three days as long as I live.
We mused that there have been only four basic designs that have been widely used since the very beginning; the Williamson circuit, the Mullard 520 circuit, the Dynaco pentode-cathodyne circuit and the Stewart Hegeman all pentode circuit. As the mornings turned into nights and we used up all the napkins on our table drawing amplifier diagrams, a remarkable circuit emerged as Tim held the pen and drew a balanced current-sourced front end, followed by double balanced drivers using a frame grid triode ultimately direct coupled to the grids of the output tubes.
The man with big muscles holding the amplifier is me, Bob Carver.
Successful collaborative effort:
Tim designed the all important current sourced front-end. Together we designed the output stage, power supply, bias supply, and I designed the driver stage using the frame grid triode. It’s simple, magically balanced with no offsets, and as it turned out, sonic performance that cannot easily be believed.
But I'm getting ahead of myself.
I've been collecting vintage amplifier parts for a lifetime, always with the notion of making a small museum someday. But after spending three fascinating days with Tim, I had a change of heart and decided a much better use for them would be to build an amplifier. This amplifier is an updated version of that first vintage one."
Begge desse gutane lagar ting med både transistorar og røyr.