[Hallicrafters] antenna

[Joan S Richards]

Mike;

I cannot agree with everything you said. The power line caps and resistor
are there for a reason. The caps bypass RF coming in on the power line
and should be replaced with special AC line caps, designed to fail open
rather than shorted. The resistor drains static charge off the chassis /
cabinet if not properly grounded. The best thing to do is install a
3-wire cord and plug on every radio and also a good ground. No more
shocks.

Ed Richards K6UUZ

On Sun, 15 May 2005 10:08:23 -0700 (PDT) Mike Everette
<radiocompass at yahoo.com> writes:
> For general receiving I'd just put up a long wire, say
> from the eave of the house tocabinet if not properly grounded./ a
convenient tree.  You
> could put a rotary switch in the line to select which
> radio you wish to use, and just feed each of them with
> a single piece of wire.
> 
> Don't forget lightning protection.  The simplest is to
> put a knife switch in the line -- OUTSIDE the house --
> to disconnect the antenna from the radios and run it
> straight to ground.  Always leave the antenna grounded
> except when you are using the radios.
> 
> If you leave the antenna connected during a storm,
> current can be induced into the wire from nearby
> lightning -- enough to burn out an antenna coil.  It
> does not need to be a direct strike.
> 
> BE CAREFUL with that S-22R (or any other radio with an
> acey-deucey power supply)!!!
> 
> There are 3 capacitors in the S-22R, all 0.25uf,
> between the chassis itself and the "electrical"
> ground.  There is another, a 0.002 or 0.005 uf, from
> the hot side of the line to the chassis.  BE SURE you
> have changed all these and replaced all of them with
> something rated for AC.  If you don't you are
> GA-RON-TEED to get lit up (been there, done that, not
> fun -- happened before I recapped the radio), and you
> may not need a radio to listen to the celestial
> voices.
> 
> Also be sure you either replace or remove altogether,
> all the power line bypass caps in the
> transformer-operated radios, or you may get lit up (or
> at least tingle-ated) if you touch two of them at the
> same time.  These old caps LEAK!  And in the SX-110,
> get rid of that 470K resistor from one side of the
> power line to ground (who knows what the designer was
> thinking when that was specified!! Duh!).  If you
> replace the caps, use parts rated for at least 1000
> volts AC so they will withstand surges.  (In the
> S-22R, the aforementioned capacitors must be in the
> circuit).
> 
> Bond all the radios together for common ground -- but
> BE SURE, before you connect the S-22R to the ground
> system, that the radio is plugged in such that the
> chassis is not hot!  Best way to avoid this is to use
> a 3 wire cord.  Connect the black lead to the supply
> side of the circuit (so it goes to the rectifier), the
> white lead to the chassis, and the green lead to the
> ground terminal on the antenna strip.
> 
> 73
> 
> Mike
> WA4DLF
> 
> 
> 
> 
>                 
> __________________________________ 
> Yahoo! Mail Mobile 
> Take Yahoo! Mail with you! Check email on your mobile phone. 
> http://mobile.yahoo.com/learn/mail 
> ______________________________________________________________
> Hallicrafters mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hallicrafters
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:Hallicrafters at mailman.qth.net
> ----
> List Administrator: Duane Fischer, W8DBF **for assistance**
> dfischer at usol.com
> ----
> Hallicrafters Collectors International: http://www.w9wze.org
> 
>