Gary hit the nail on the head. Ultralights are very sensitive to RFI
from nearby external sources. Have you guys ever DX'ed with an
ultralight and someone in the household uses a TV remote control? The
noise emitted from that can be deafening! Even from another room. :)
I found an SRF-M70 at a Goodwill over the weekend. Put batteries in it,
FM was okay but AM was completely dead, just a constant wooshing sound.
It's going back, along with a vintage JC Penney AM only superhet set.
Loud hum on AC and completely inoperable on batteries. Big, old set but
unbelievably only uses 2 AA batts.
73,
Dave in Indy
----------------------------------------------------------------------
Message: 1
Date: Sat, 15 Mar 2008 14:06:53 EDT
From: [EMAIL PROTECTED]
Subject: Re: [IRCA] Ultralight DXpeditions...Freedom and Fun Without a
Ton .
To: [email protected]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="US-ASCII"
Hi Brett,
I had the same problem here with my Sony MD recorder and Edirol
R09 mp3
recorder, which both emit way too much RF hash to record weak TP's.
After
much experimentation, I settled on the Sony ICD-SX57 audio recorder,
which is
a very high quality digital recorder that is completely free of RF hash
during recording (as long as you separate it from the radio by at least
12
inches). This ICD-SX57 can record in near-CD quality stereo if
desired, and retails
for just over $100 at Amazon.
After recording the TP's on the Ultralights, I re-record the clips
onto
the Edirol R09 (or any other mp3 recorder), for downloading onto the
computer. The system worked great during the DXpedition, and a couple
of mp3 clips
are posted on the "Ultralighthotrodding" group site at yahoo.com.
RF hash is the enemy of the ultra-sensitive hot-rodded
Ultralights, so
I purposely avoided any computer-generated recording program. In fact,
Ultralight DXpeditioners would do well do avoid any computers and the
RF hash they
generate, since the stock antennas (or mega-transplants) do not have
the
shielded inputs common in table receivers. This motivates serious
Ultralight
DXpeditioners to find an RF-hash free recoding zone, if possible.
73, Gary
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