[R-390] Ballast Tube Thread

[Brian Sherwood]

personally, i look forward to a little humor scattered amongst the several
thousand other pieces of email i chew through every day.

73 de ka9egw

-----Original Message-----
From: r-390-bounces at mailman.qth.net
[mailto:r-390-bounces at mailman.qth.net]On Behalf Of Clay Curtiss W7CE
Sent: Tuesday, July 06, 2004 11:07 AM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] Ballast Tube Thread


More than enough.  This thread is now worse than my daily spam.  I'm
unsubscribing from the list as soon as I hit send.

----- Original Message -----
From: "Patrick" <brookbank at triad.rr.com>
To: "Bob Camp" <ham at cq.nu>; "Lee Bahr" <pulsarxp at earthlink.net>
Cc: <r-390 at mailman.qth.net>
Sent: Tuesday, July 06, 2004 7:12 AM
Subject: Re: [R-390] Ballast Tube Thread


> Enough is enough, please stop this nonsense
> ----- Original Message -----
> From: "Bob Camp" <ham at cq.nu>
> To: "Lee Bahr" <pulsarxp at earthlink.net>
> Cc: <r-390 at mailman.qth.net>
> Sent: Tuesday, July 06, 2004 10:03 AM
> Subject: Re: [R-390] Ballast Tube Thread
>
>
> > Hi
> >
> > Well we had  been heading for the record in the "longest most inane
> > ballast tube thread not mentioning solid state solutions". Now I think
> > we will have to go for the longest most inane ballast tube thread -
> > unlimited category.
> >
> > I would suggest at least two PIC processors with some nice long high
> > speed leads. We could put one part in the ballast tube socket and run
> > the wires through the IF chassis and in to the RF chassis. If we get
> > enough stuff running back and forth an R-390 can work just like a rice
> > box.
> >
> > The standard solid state solution for years was to put in a full wave
> > bridge rectifier and with a low voltage linear regulator set up as a
> > constant current source on the inside.  The normal problem is that the
> > current moves through in in pulses rather than as continuos AC. The
> > pulses generate RFI. Since you are in the middle of the radio that's
> > not a good idea.
> >
> > A more interesting approach might be to use a couple of mosfet's and
> > rig them so they do pass AC. It would be a lot more circuitry though.
> >
> > The final problem you run into is that you have to get rid of 5 watts
> > from a solid state device. You don't need a monster heat sink but you
> > won't get away with out some kind of heat sink.
> >
> > Now, with a fairly small tank of liquid nitrogen we could get around
> > the cooling problem. There would be some minor plumbing issues but it
> > should work. The Air Products truck could drop by from time to time to
> > keep you topped up.
> >
> > Take Care
> >
> > Bob Camp
> > KB8TQ
> >
> >
> >
> > On Jul 5, 2004, at 11:34 PM, Lee Bahr wrote:
> >
> > > What about a "lively" discussion on building "adapter" sockets for
> > > lesser
> > > used 29 cent Ballast Tubes?  We could include blinking LEDs around the
> > > perimeter of the adapter socket for enhanced desirability.
> > >
> > > What do you guys think?  Should the LEDs be white, blue, red, yellow
or
> > > orange?  Super Brite or what?
> > >
> > > Or, we could include a transducer to emit eerie R-390A sounds as the
> > > ballast
> > > did it's thing!
> > >
> > > Or, we could include a micro memory keyer to constantly send the
> > > R-390A's
> > > serial number if it were ever stolen.
> > >
> > > Or, it could give a beeping sound with greater intensity when line
> > > voltage
> > > was dropping or rising to an dangerous level!
> > >
> > > What do you guys think?
> > >
> > > Lee, w0vt
> > >
> > > PS:  (Side note) What type of solder should we all be using?  And, can
> > > I
> > > reuse black beauties if I epoxy the cracked cases shut?
> > >
> > >
> > > _______________________________________________
> > > R-390 mailing list
> > > R-390 at mailman.qth.net
> > > http://mailman.qth.net/mailman/listinfo/r-390
> > >
> >
> > _______________________________________________
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