[QuadList] VTR introduction anniversaries: 1965

[Don Norwood]

Apparently you don't need recapping at all Guy!  The record amps did have tubes in the VR-2000, 3 in each channel!

Don
  ----- Original Message ----- 
  From: Guy Spiller 
  To: Quad List 
  Sent: Thursday, February 10, 2011 8:47 AM
  Subject: Re: [QuadList] VTR introduction anniversaries: 1965


  I seem to remember the VR-2000B that I worked with back in the day, also had tubes in the four record amps....similar to the early TR-70s.  
  Seems like those big tube record amps were one of the major differences between a 1200 and a 2000.
  But, then again, my memory may need recapping.
  Guy

  On 2/10/2011 8:39 AM, Chill315 at aol.com wrote: 
    I got the brains working a little better.

    The tubes in the VR-2000 were in the Mark 10 head pre-amp.  These were the four Nuvistors.  Don't see those any more.  The manual that came with my 1200 talked about shorting bars in the head pre-amp to reduce the gain.  I have no idea how that worked.

    There TR-70 had a modification kit for the machine to replace a tube driver in the record amps.  It was something I remember the U of M Dental school operator showed me.  

    Those were the only tubes that I am aware of other than the scope and monitors in the units.  

    The audio was transistorized as stated in another reply.  There were several modification bulletins for this part of the machine.

    Chris Hill
    WA8IGN

    In a message dated 2/9/2011 11:12:09 P.M. Eastern Standard Time, park at videopark.com writes:
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