[Icom] IC-756 or an Original Pro

Thu, 19 Dec 2002 09:46:26 -0600

It is interesting  how things that seem new have been around for so long. In
1955 I was teaching at the Air Force school at Scott Field. At that time I
taught the Western Electric LDT-2 using a technology that was first
developed in the mid thirties. It used double sideband with two voice
transmissions on one sideband and four RTTY signals on the other. The
signals were multiplexed. There was a coil that brought the two sidebands
together while eliminating the carrier but I cannot  for the life of me
think of the name of that coil. The rig used two 4-400 tubes in the final
and was a fun rig to teach and operate.

73 de Jim, K5ROV...

James (Jim) Parsons, K5ROV, CMSgt (E-9), USAF, Ret., San Angelo, TX
Ham for over 60 yrs. 90% CW
[email protected],     QCWA, ARCI, Fists, ARRL, ARMS.
EX: W1RLA, K5FBB, K4FEO, SV0WN (CRETE), SV0WN (RHODES),
DL4NC, DL4JP, KA2FC (JAPAN), KA2JP (JAPAN).
JOHN 3:16

----- Original Message -----
From: "Ekki Plicht" <[email protected]>
To: <[email protected]>
Sent: Thursday, December 19, 2002 5:35 AM
Subject: Re: [Icom] IC-756 or an Original Pro

>  >independent-sideband (ISB) transmission: Double-sideband transmission in
>  >which the information carried by each sideband is different.
>
> OK.  Sounds like this would not apply to hams.

Stereo transmissions?
No, seriously, although this is not directly useful it might lead to some
experimentation, and that's what ham radio is about, isn't it? ISB in
commercial radios is used for scrambling voice transmissions. The scrambled
voice is on one channel, the scramble information is transmitted on the
other.
Or maybe this might give new meaning to the Single OP, two radio class in
contests?

>  >10/100BaseT (RJ-45) LAN connectivity: To allow control of the
transceiver
>  >via an Ethernet LAN connection.
>
> Again, the software to do this would probably not be ham-oriented (or even
> available)

I wouldn't think so. There is a lot of software for radio control (any
brand)
and doing it over ethernet isn't more difficult than doing it over serial
ports. In some cases it might even be simpler. And I know that many hams
already have a small ethernet network at home. At least an M/M contest
station has it (for logging).

Further, I could imagine that the ethernet connection provides much more
than
just remote control. Why not data transmission directly (tcp/ip or other).
If
the rig has a TNC built in, you can look at it as a complex modem  Or even
compressed, slow "voice over IP" on HF?

>  >Tempest: USDOD/NATO military EMC certification.
>
> If I were to need this, I think I would be a lot busier doing other
things.

Might come handy in a large M/M contest setup, hi. The radiation level there
is sometimes equal to tactical military situations...

>  >In all seriousness, though, the new radio which replaces the IC-781 and
>  >IC-785 will be aimed at commercial and governmental as well as ham
>  > markets, as the IC-781 was. The potential for sales in those areas is
>  > far greater than that in the amateur marketplace.
>
> I understand.  The thought of a radio a quantum jump ahead of the current
> 756-PRO family, though, is quite intriguing.

Rhode & Schwarz does have a commercial rig which is intended to sell to
mil/com market only. Nevertheless there is a rumor that at least 50 hams
bought it for hobby use, at a price tag of about US$10k, without options.
There is a high end ham market.

73 and best seasons greeting to all,
Ekki, DF4OR

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