OT: Tube Audio - test-drb@ccmp.vtda.org

20 Oct 2005

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Subject: Re: OT: Tube Audio
   From: Scott Stevens <chenmel at earthlink.net>
   Date: Thu, 20 Oct 2005 07:40:01 -0500
     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>

On Thu, 20 Oct 2005 07:57:58 -0400
Allison <ajp166 at bellatlantic.net> wrote:

Subject: Re: OT: Tube Audio
   From: "Chuck Guzis" <cclist at sydex.com>
   Date: Wed, 19 Oct 2005 23:08:47 -0700
     To: cctalk at classiccmp.org

On 10/19/2005 at 10:19 PM Zane H. Healy wrote:

 OK, since there seem to be a fair amount of people
into Tube audio, 
or at least with a knowledge of it.  Would someone care to explain 
the following to someone that is used to an all in one unit such as a 
Sony Receiver.  What is the purpose of separate Amp and Pre-Amps.  I 
think I understand the whole phono pre-stage, but I've yet to find a 
decent explanation of the rest, and I'm looking to switch to tubes 
for playback of records (primarily Vinyl, but I'm also interested in 
78's). 
Purely from memory, but I believe one generally used a separate pre-amp
mostly due to hum issues.  The power supply for the preamp could make use
of lower plate voltages, better regulation and DC heater supplies.

Or so I think I recall.

Cheers,
Chuck

 No.  Gads, creating answers revisionistically. Rare back then was a preamp 
 with DC heaters.  Besides without the oxygen free stabilized cables how 
 could you appreciate it. ;)
  My Dynaco preamp is from the early 60's and has a filtered DC power supply
section for the heater filaments.

I didn't say nonexistant, only rare.  Dynaco was amoung the best then.
The alternate was a filiment that was balanced to ground to minimize
the amplitude of AC heater to cathode coupling, also only seen on 
quality gear.

Allison