[opendtv] Re: Learned somthing new today
- From: "John Willkie" <JohnWillkie@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 6 Apr 2005 20:30:11 -0700
Geez, I thought I almost learned something, Bob, but I was mistaken.
What's the difference between an analog and a digital transmitter? (The
digital transmitter has better linearity, basically, in the power amplifier
stages, and each has a modulator appropriate to it's encoding system.)
That's it. PERIOD.
Anything an analog transmitter can do, a digital one can do, and -- quite
often -- the opposite is true.
What you found out is that there is an active market in used transmitter
parts, particularly among cheaper broadcasters. This is no new. Just an
example: when the U.S. stopped making transmission tubes in the late 1980's
(except for IOTs), broadcasters freaked about replacement tubes -- which
mainly now come from Russia.
Not a peep in the regular press. Who the hell else -- aside from the FAA --
even uses transmission tubes? (Find a cavity and fill it.)
John Willkie
----- Original Message -----
From: "Bob Miller" <bob@xxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Monday, April 04, 2005 7:23 PM
Subject: [opendtv] Learned somthing new today
> Being new to broadcasting and never having actually broadcast anything
> yet except as a demo I find it is easy to learn new things.
>
> For example I learned today that a rape of broadcasters is going on for
> parts. Parts for transmitters specifically transmitters being used for
> analog broadcasting. It seems as the digital transition drags on
> transmitter manufacturers find they have sold most of the transmitters
> they are going to sell for awhile since the digital ones that they are
> going to sell have mostly already been sold and will last for 20 years.
>
> So there is not going to be a need for analog transmitters much anymore
> so the cost of parts like tubes is going up radically and the tube
> liability of broadcasters is getting pretty serious. It is a case of
> make hay while the sun shines I guess.
>
> It is probably a legitimate rape but it is an indication of another
> factor besides eclectic bills that will increasingly see broadcasters in
> favor of a hard date for analog cutoff.
>
> It also seems that the broadcasters bean counters may be in for a
> significant shock as many go full power on UHF stations by July. Many of
> their electric bills will jump ten fold month to month. That will be
> another incentive to get off those UHF stations that they must vacate
> anyway above channel 51.
>
> Lots of things are starting to build for a real analog shutdown.
>
> Bob Miller
>
>
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