[R-390] The saga cont pt 6 pleasant surprise

Sun Sep 12 08:43:21 EDT 2010

Hey, waitaminnit...parts of my home still have knob-and-tube...I look
forward to redoing that with almost as much enthusiasm as I look forward to
recapping my IF deck.

Fortunately, excepting C553 [currently an AVX yellow unit and quite compact
in it's dimensions], it looks like all the BBOD's are on mounts out towards
the edges of the deck where they can be gotten at...if all these BBOD's were
buried atop the tube sockets I'd likely put the radio on the auction place
and wash my hands of it...but everything so buried seems to be silver mica's
or ceramic discs, both of which I'm perfectly willing to leave alone...

So whazza story on the kielbasa?
  -----Original Message-----
  From: Les Locklear [mailto:leslocklear at cableone.net]
  Sent: Sunday, September 12, 2010 6:53 AM
  To: ka9egw at britewerkz.com
  Subject: Re: [R-390] The saga cont pt 6 pleasant surprise

  So many different modifications, so many different opinions regarding the
3TF7 replacement, but they "ALL" work. Be careful of the naysayer's that
tell you the frequency will shift when turning on a light switch or that you
will never again hear that heterodyne from Pitcairn Island. Most of them are
witches and still have tube and knob wiring in their
homes....................... One of the best modifications ever involved a
Keilbasa Sausage, thus the Keilballast Legend was born!

  Les Locklear

  "As you wander through this world you see lots of funny men.
  Some will rob you with a six-gun, some with a fountain pen."

  --Pretty Boy Floyd

    ----- Original Message -----
    From: ka9egw at britewerkz.com
    To: Les Locklear
    Sent: Saturday, September 11, 2010 5:43 PM
    Subject: RE: [R-390] The saga cont pt 6 pleasant surprise

    You mean the 3TF7?  I've been debating replacing it with a diode, a cap,
and
    an LM117 configured as a current limiter...or just jumper it and run 12V
    versions of hte tubes it feeds...or jumper the socket to allow sticking
a
    12BH7 in there...or...?

    Since I have a spare 3TF7 on hand it's not what I'd call a panic-mode
job.

    But replacing all those caps on the IF deck...rats.

    -----Original Message-----
    From: r-390-bounces at mailman.qth.net
    [mailto:r-390-bounces at mailman.qth.net]On Behalf Of Les Locklear
    Sent: Saturday, September 11, 2010 5:26 PM
    To: rbethman; r-390 at mailman.qth.net
    Subject: Re: [R-390] The saga cont pt 6 pleasant surprise

    Brown, Black or Gray, what Bob said!

    Also, make sure the Keilballast tube isn't replaced unless you first
discuss
    it right here!

    Les Locklear
      ----- Original Message -----
      From: rbethman
      To: r-390 at mailman.qth.net
      Sent: Saturday, September 11, 2010 4:52 PM
      Subject: Re: [R-390] The saga cont pt 6 pleasant surprise

        The Brown Tubulars are the same thing as the BBODs!

      The must be replaced!

      Bob - N0DGN

      On 9/11/2010 5:27 PM, ka9egw at britewerkz.com wrote:
      > To be quite honest, I'm not sure if therer are any "Black Beauties
Of
    Death"
      > in this radio; all the caps under the IF deck, for example are
either
    yellow
      > AVX film caps or light green silver micas with the value stamped in
    plain
      > text [not the old dot code SM's], or brown tubulars.  I'm guessing
it's
    a
      > very late IF deck being as it looks like the filter trimmer access
holes
    on
      > the side were punched at time of manufacture and the markings by
them
    are
      > silk screened.  There are some brown tubulars under the IF deck,
bypass
    caps
      > mostly, but not a black one to be seen.
      >
      > Mygawd, I hope I don't have to replace every one of those brown
tubular
      > jobs...that would be a hell of a job.  I figured if the filter
killer
    C553
      > and the 8uF 'rotter' on the audio board were replaced, that got the
      > immediate 'wolf off the door'.
      >
      > Although come to think of it there are 2 other caps in the
audio/limiter
      > circuit Chuck Rippel recommends shotgunning, aren't there?
      >
      > And I DO have a couple virgin octal plugs to build new filter caps
on,
      > although the old ones aren't leaking and there's no hum to speak
of...
      >
      > Has anyone put together a comprehensive list of all the caps in the
    radio
      > that should be replaced if one is going to go over-the-top?  If it's
    every
      > non-silver-mica/non-ceramic-disc in the radio, frankly, I dread
getting
    into
      > it to THAT extent...but if that's what has to be done...at that
point it
      > ain't fun anymore...
      >
      > 73 de KA9EGW

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