[Boatanchors] Ceramic "Dogbone" Capacitor Replacements

[Al Parker]

Hi Bill,
    I'll jump in, but I'm sure there'll be more opinions (all are worth
what you pay for them).
    Looking bk in history, Hammarlund recommended using disc ceramics
everywhere when replacing the BBOD's, and they did so in SP-600's after
somewhere in the 17,000's ser. no.s   About the same vintage as the
75A-2/3 R-388/51J-3's.
    I do a lot of SP-600 work, as well as some R-388's.  If it's for
somebody else, and they have a preference, I will use polypropelyne Orange
Drops for coupling caps.
    Sometimes I will use a new dipped silver mica, particularly in the AGC
of the R-388/etc. where there's one old mica that frequently goes leaky &
screws up the AGC.
YMMV
73,
Al, W8UT
New Bern, NC
BoatAnchors appreciated here
http://www.thecompendium.net/radio/
  soon to be at http://www.boatanchors.org
http://www.hammarlund.info

----- Original Message ----- 
From: "Bill Pancake" <bpancake at mindspring.com>
To: <boatanchors at mailman.qth.net>
Sent: Tuesday, February 07, 2006 2:22 PM
Subject: [Boatanchors] Ceramic "Dogbone" Capacitor Replacements


> Would appreciate some advice on what "type" of modern replacement
capacitor can be used in place of the ceramic (10,000 mmf, 350 vdc)
"dogbones" used throughout a Collins 75A-2/3 receiver as coupling caps,
etc... ceramic disk, mylar, tubular film, ??? Thanks in advance for any
recommendation, 73, Bill
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