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Eeyore Eeyore is offline
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Default Design for a small tube/valve mixer



"Tynan AgviŠr" wrote:

Eeyore wrote
Ian Iveson wrote:

I have been dipping into the thread occasionally hoping to
find the bit where voicing is discussed. I wonder by what
process an agreement about desired quality of sound can be
reached remotely with a prospective end user who wants
"something special"


Indeed. I'd like to know if Tynan has a particular benchmark tubed mic
pre that he likes already.


snip


Yes, Graham. I like the pendulum MDP-1 mic pres, the VAC RAC(which I guess
a lot of folks have not heard of), the Ampex 300 recorder amps, and Pultec
tube preamps. (of course all the designs ive seen for the pUltec amps were
"one-offs", and never saw any model numbers, unlike the outboard processors
(eq/comp, etc)..which did have model #s)
If I could have the "300 sound" with a touch less noise, id be in heaven.
those sound perfect to these ears.


Oh !

The Ampex mic amps are widely considered to be somewhat mediocre. There never
was any intention for them to be anything special, just to 'do the job'.
That'll explain your noise comment for sure. It ought to be simple to 'upgrade'
an Ampex design to a lower noise level. The Pultecs I would expect to be
better. I've already found a schematic for one of those. It was astonishingly
'routine' however, just 2 triode stges with a cathode follower.


the VAC RACs are amazing too, but noone has heard of em.


I shall look into those.


schematics for some vintage things...

http://www.one-electron.com/FC_ProAudio.html

http://www.reevesaudio.com/studiothree.html


Thanks.

Graham