On Jun 1, 8:49 am, junius wrote:
On May 26, 1:36 pm, Telamon





wrote:
In article . com,

RHF wrote:
On May 20, 7:23 pm, Telamon
wrote:
In article .com,

RedPenguin wrote:
On May 20, 7:13 pm, Telamon
wrote:
In article . com,

RedPenguin wrote:
I have a fairly large amount of insulated copper wire, that is solid.
MySonyICF-7600GR, has an externalantennajackthat is just
basically a headphonejackwith it's connector. Isn't it possibly just
to put this insulated wire on a 1/8jackand make fairly okantenna?

Yes but it needs to be a monojackwith two conductors tip and barrel.

Connect the wire to thejacktip for a single wireantenna.

I guess you can't just use any end, I used one from an old pair of
headphones that broke for the heck of it to test and it barely got
any signal in. Am I wrong about using copper wire like this?

If you want something better use two wires, one to the barrel and the
other to the tip. Stretch the wires in opposite directions and you have
a dipole. Make sure they don't short to each other inside thejack.

Can you just buy those ends anywhere? I never heard of a tip and
barrel, but I guess I can maybe find them at Radio Shack.

I have given you the wrong idea. The tip and barrel are descriptors of
the same plug. The stereo head phonejackyou used is a barrel contact,
a ring, then a tip. Examine the stereo headphonejackyou have and you
will see that there are three contacts (metal areas) separated by two
insulators. You only need two contacts, a tip and barrel. The plug you
need will be the same size but only have the two contacts missing the
small ring contact.

Theantennajackis meant to power a small externalantennathatSony
sells so you do not want to short the two contacts of thejack. Use
insulated wire.

--
Telamon
Ventura, California- Hide quoted text -

- Show quoted text -

Telamon,

FWIW - TheSonyAN-LP1 Active Shortwave LoopAntenna
requires it's own built-in {Set-of-Batteries} Battery Power to
Opperate. TheSonyICF-SW7600GR Radio simply supplies
a small 'sensing' Voltage to only "Switch" the AN-LP1
On-and-Off; and nothing more.

NOTE - This Switching {On-and-Off} Voltage from the Radio
does NOT Supply the needed Power to actually Power the
SonyAN-LP1 Active Shortwave LoopAntenna.

TheSonyICF-SW7600GR Radio has built-in 'protection'
for this small Switching Voltage : When a normal 1/8" Mono
Phone Plug is used with anAntennaWire and Ground Wire.
http://www.universal-radio.com/catal...able/0360.html

TheSonyICF-SW7600GR Radio can be run on (via) an
AC-to-DC Adapter {Wall Wart} while theSonyAN-LP1
Active Shortwave LoopAntennacan be Powered with
(via) Two (2) "AA" Batteries = 3 VDC.
http://www.universal-radio.com/catalog/sw_ant/3676.html

hope this helps - iane ~ RHF

What about this 2nd to last line in this link?
http://www.universal-radio.com/catalog/sw_ant/3676.html

"The AN-LP1 derives power from the radio when connected to models
ICF-SW1000T or ICF-SW7600G."

--
Telamon
Ventura, California- Hide quoted text -

- Show quoted text -

Shortly after I got my '7600GR, I hooked it up with the AN-LP1 antenna
to see if the '7600GR would power this antenna. It would not. When
hooked up to the '7600GR, the AN-LP1 required batteries and required
being placed in the "on" position. I'll go home this evening and test
out whether the '7600G actually can power up the AN-LP1... It would
seem rather surprising if the '7600G did, while the '7600GR did not.
Although I'd prefer that neither utilized the antenna jack for
powering an external active antenna. I just don't much care for that
arrrangement.

Junius- Hide quoted text -

- Show quoted text -

one error in my earlier post...an-lp1 did not require being placed in
the "on' position. "off" is a standby mode and antenna is activated
when radio is turned on while hooked up to antenna.

for more on the sw7600g (and in every likelihood applicable to the gr
version) external antenna jack, see the following (while i can't
attest to the accuracy of the info, indications suggest that this
individual did his homework):

from: http://groups.google.com/group/rec.r...3?dmode=source

1.- The ext. antenna socket is "hot", i.e. powered through a 470 ohm
resistence + 100 uH coil. This means that it will deliver approx. 10
mA
DC current to the external antenna circuit. The coil is to prevent
"polluting" the power circuit of the radio with radio frequency
signal.
Evidently, the purpose of this arrangement is to "inform" the
accessory
antenna when the radio is turned on. In case of the Sony AN-LP1 it
turns on the antenna without need to use the antenna power switch.
However, the 7600G will NOT power the antenna, the 10 mA are not
enough
to power the amplifier circuit. The power for the AN-LP1 comes from
its
own batteries. You can use this feature with any active antenna by
including a proper power-up circuit - a nice feature if your active
antenna is located far away from the radio and you want it to turn on
and off automatically when you use your radio.

2.- You can connect any other antenna (provided it is correctly
designed
and installed) to the EXT ANT socket without risking to damage the
radio. However, if the external antenna circuit has low DC
resistence,
it will drain some current from the radio. Therefore, you will
experiment slightly higher power consumption from your batteries (up
to
10% at normal listening volume). You can avoid this current drain by
including a small ceramic capacitor (1000 pF) in series with the
antenna
circuit, however I don't think it is really necessary.

3.- The 7600G has some basic protection build into the EXT ANT input
circuit. Any static buid-up will be drained off via the power circuit
mentioned in point 1. It also includes a diode pair (1SS123) to
protect
the input RF amplifier FET from damage due to too strong signals or an
accidental connection of the antenna to a low voltage AC source. IT
IS
NOT A SUBSTITUTE FOR A PROPER ANTENNA GROUNDING AND LIGHTNING
PROTECTION
IF YOU USE AN EXTERNAL ANTENNA - YOU STILL NEED TO PROPERLY GROUND
YOUR
EXTERNAL ANTENNA AND PROTECT YOUR RADIO, but it builds some margin of
safety to protect the front-end FET - a common problem with the Sony
2001D (2010).