[AMPS] ?: 2C39A's & 7289's

[Radio WC6W]

A couple (of easy) questions on these parts.

  1. Is the warmup time the same for a 7289, as a 2C39 -- 1 second?

  2. Does a low frequency test (curve tracer) provide any useful
information about the condition of these parts... or is it possible for
them to display OK at LF but, be "flat" at a GHz?

  3. I also ran some other tubes that fit the outline and they check
basically the same -- Is there any significant difference between 7289's
and:  the 7698, Y2177, Y602, the EE-144 and the 2C41?

Thanks in advance & 73,
  Marv  WC6W







*

________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today!  For your FREE software, visit:
http://dl.www.juno.com/get/tagj.

--
FAQ on WWW:               http://www.contesting.com/FAQ/amps
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com