From: Monty@vnet.ibm.com (Bryan Montgomery)
Date: Wed, 26 Aug 92 15:34:37 BST
Newsgroups: alt.radio.scanner
Subject: Scrambling ?? / Yupiteru MVT-7000
Reply-To: Monty@vnet.ibm.com
Organization: IBM Havant UK
Disclaimer: This posting represents the poster's views, not those of IBM
News-Software: Usenet 3.0

Hello,

I was wondering if anyone had come across a similar situation; Once upon
a time, not so long ago, there was a channel that one could listen to
quite happily without  causing anyone any trouble. However, this
suddenly changed one night.

Now, when you try listening to this channel, all you get is gobbeldy
gook! It almost sounds like a BFO signal but it is FM modulated. What is
it? Is there a simple cure? I have heard of channels being frequency
inverted to 'scramble' them. Is this what has happened? Is there a
simple method one can use to convert it back to plain speech? I believ
that the radios in question are still very similar to what they used to
be, suggesting a simple change?

Anyway, someone (from Holland?) mentioned the Yupiter MVT-7000. I have
just received one of these sets and am (on the whole) very impressed. I
was considering the IC-1 () and the AOR 1000/1500 (very
toyish/plasticy feel). I al,ost bought the Alinco handheld but in the
end I was talked into the MVT.

For those interested, it covers 100KHz to 1300MHz ( no gaps, although
0.1 to 8 MHZ is quoted as less sensitive), sensitivity of 0.5uV for 12dB
SINAD NFM (not that that means too much to me!), has 200 channels, 10
banks, 11 programmable banks, 10 programmable search bands, 16
channels/sec, AM, NFM & WFM and an attenuator switch. Incidentally, it
is shipped from Japan with a 110V adaptor! This is as well as a
telescopic aerial, NiCads and a car power lead.

It works very well as a SW receiver, so much so that when I recently
strung up a 50' wire there were so many signals coming in I had trouble
deciphering one, although with the attenuator button selected the main
station comes in fine. The unit will start in a direct frequency mode or
a channel from memory when switched on, depending on what was happening
when it was turned off. However, my one real gripe, is that it I can't
get it to scan when first turned on. SSB would have been a nice
additional feature. Also one thing that would be useful would be to have
a DUPLEX feature, such that 2 channels are paired so that when one is
detected and the carrier disapears it scans the pair a couple of times
before continuing the others. I guess I really need a scanner with RS232
sockets!

Enough of my ramblings anyway, I'd be interested to hear from any fellow
MVT owners,

P.S. Have you heard about 'Diana-gate'? Recordings of a cellular
conservation supposedly between Princess Diana and a 'friend'. Interesting
as that is illegal and the police have stated that they expect to take no
action!


       From
               Bryan Montgomery  ( Production Engineer )


 Tel : +44 (705) / (0705) 486363 Extn 8593          Mail Point 32/21
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