[sdiy] columbia/princeton

[Mike Brown]

not sure, but it looks like they are klark technics... the two below them
look like krohn-hite 3202 LP/HP/BP filters, nice but no Q unless you make a
feedback loop amplifier.

the pyramid of signal generators is most impressive, though.

MB
  -----Original Message-----
  From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of SRRecords at aol.com
  Sent: Thursday, April 21, 2005 5:38 PM
  To: analogue at hyperreal.org
  Cc: synth-diy at dropmix.xs4all.nl
  Subject: [sdiy] columbia/princeton


  Hello

  Can ANYONE tell me the make/model of the filters seen in this photo:

  http://www.columbia.edu/acis/history/cpemc.html

  (third photo down)

  just diagonal to the UPPER LEFT of Virgil deCarvalho's head - two white
boxes with sliders, one on top of the other....?  I once knew, but now the
name escapes me.

  Thanks a bunch,

  J Mask
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