I had a problem that sounds like yours and turned out to be the clock in the
computer I was sending from being totally out of whack. Slow, stopping when
it wanted to for however long it felt like, etc and the time settings for
internet setting it weren't fixing the problem. And yes I changed the
battery and no help. Sold it. That was then end of that problem.
73, Jim
-----Original Message-----
From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of WD8ARZ
Sent: Wednesday, September 24, 2014 3:57 AM
To: jim@audiosystemsgroup.com; rfi@contesting.com
Subject: [RFI] Takes too long for my postings to clear the admin - 73 and
Good Bye from Bill - WD8ARZ
It takes way way too long for my proper emails to be posted to this RFI
list. Yet I see others being posted in the mean time. Thus I must be
moderated. Based on my track record with many other sites and this one, that
restriction doesnt make any sense .....
Soooo ........... I give up ..... and pulling the plug on this user forum
and this will be my last email effort.
73 from Bill - WD8ARZ
For Example:
-------- Forwarded Message --------
Subject: Mod Fix For Tecsun PL-660 Squelch Glitch
Date: Tue, 23 Sep 2014 07:36:50 -0400
From: WD8ARZ <wd8arz@ix.netcom.com>
To: rfi@contesting.com
The PL660 has an annoying issue. When the signal is less than two or three
signal strength bars, the audio drops to a low level and goes bassy. When
the signal is in that trip area of signal strength trip point, and is fading
and strengthening going below and above that trip level, the audio switches
in and out of this designed in mode and is very annoying. There is some
audio distortion from that 'feature' too.
Only thing I can think of as the reason for that feature, is to fool the
listener into thinking this is a quieter radio when there is no signal or a
weak signal. Instead it destroys the intelligibility of weak signals that
would other wise be listenable.
The attached PDF file details how to do the 'Dynamic Squelch'
modification. I did use the switching arrangement, but because I always
leave the mod switched in, I would recommend that using the switching is not
needed once you become convinced the mod is working and very worth while.
A Russian group with high interest in this radio has evolved several mod's,
with this one in my mind the most significant. A video of the results for
this mod is at:
http://www.youtube.com/watch?v=u5W9cDiBoP0 and is named Tecsun PL-660
modified : Dynamic squelch (muting) disabled
That group is located at, and translated by Google:
http://www.radioscanner.ru/forum/topic42851-89.html
Run through the Google Translator at
http://translate.google.com/ by putting the url above in the left
box, and clicking on the google url in the right box, you get a translation.
You can now arrow forward and backwards, and jump to other pages. In there
you will find tons of information, photo's, schematic's, and block diagrams
about the PL-660.
Taking the radio apart and putting it back together takes more time than
doing the mod.
It is very worth while getting the mod done.
73 from Bill - WD8ARZ
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