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Old June 3rd 07, 03:07 AM posted to rec.radio.shortwave
Joe Analssandrini Joe Analssandrini is offline
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First recorded activity by RadioBanter: Jun 2006
Posts: 200
Default Sony 7600GR External Antenna Jack, Needs to be settled, Can it be shorted out to the point that it destroys the radio.

On Jun 2, 9:22 am, junius wrote:
On Jun 1, 9:58 am, junius wrote:



On Jun 1, 1:45 am, "Adam" wrote:


If you use a random wire in the Sony 7600GR radio and accidently short it,
can it destory the radio and/or cause damage or is it protected?


In the manual it says it has DC power but on at least two websites, it
supposely only has a "sense power" to turn antennas off and on.


I called sony customer support and they claim the jack doesn't have any DC
power in it, that it is only reception. This was said by two different
agents, but when I emailed them, they keep talking about the headphone jack
for some reason.


Will someone please settle this for me, it's like some are saying it can
short and at the same time, some are saying it can't at all. I just want to
have this darn thing settled.


Thanks in advanced.


I guess this touches to the issue of Sony putting a DC voltage to the
antenna jacks to power the AN-LP series of antennas.


The antenna jack on the ICF-SW07 does incorporate a DC voltage to
power the supplied AN-LP2 antenna. The instruction manual accordingly
warns:


"Do not connect any other antennas other than the recommended active
antennas to the AM EXT ANT jack of the unit, as the jack supplies DC
voltage to power the recommended active antennas."


Neither the instruction manual to the ICF-SW7600G nor that for the ICF-
SW7600GR has any similar such disclaimer.


In hooking up the AN-LP1 antenna to the ICF-SW7600GR, I have found
that the radio does not power the antenna. The antenna requires its
own batteries (unlike the AN-LP2 which can be powered directly by the
'SW07).- Hide quoted text -


- Show quoted text -


Heckfire, I should post messages while at work... A mistake here...
The manual for the SW7600GR does have one of these disclaimers, now
doesn't it? Worded as such: "Do not connect external antennas other
than those recommended to the AM EXT ANT jack. This jack outputs DC
voltage for antenna power supply."

Interestingly, the '7600G manual, dated 1994, has no such warning, and
in fact has instructions for the use of the '7600G with the old AN-1
amplified antenna, among others.

In any case, both radios behave in entirely the same manner when in
use with the AN-LP1.


Dear Junius,

You are quite correct about the warning in the '7600GR's manual. I do
not have at hand my '7600G's manual but I know you are correct there
too, especially considering the fact that the AN-LP1 had not yet been
introduced when the '7600G's manual was written (and to my knowledge
it was never revised)

The warning is plain silly however. It is almost akin to what we read
back in the old days "for best results use Columbia needles" or "for
best results use RCA tubes" but the warning in the manual is much more
explicit, wrongheaded though it is.

It has been my personal (though limited) experience that ANY
reasonable antenna, to which one can attach a 3.5mm plug, can, in
fact, be used with excellent results with the ICF-SW7600G/GR. In my
opinion, the best overall match is the AN-LP1 but others have much
more experience than I do with using other antennas with these radios.

By the way, my name is actually spelled "Analssandrini" not
"Alessandrini." I will say that this spelling error is quite common.
You ought to see some of my junk mail. There are even more "creative"
misspellings of my name!

Best,

Joe