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It seems this scheme is highly dependent on what the modulation is.�
If you're transmitting Rock with very little dynamic range� you
probably save a lot.� If you're transmitting Classical, you're
running full carrier a greater percentage of the time.� Voice is
probably somewhere in between, probably depends on whether you use
compression or not. <br>
<br>
I'm guessing the programming at WBAP is different than that at KTCK?<br>
<br>
Anyway, this MDCL scheme is interesting.� Good info.� <br>
<br>
Chris<br>
�<br>
<div class="moz-cite-prefix">On 5/20/2018 11:48 AM, Bill Guyger via
Heath wrote:<br>
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cite="mid:1042134182.3260280.1526842105871@mail.yahoo.com"
type="cite">
<div style="font-family:Helvetica Neue, Helvetica, Arial,
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<div>It's kind of interesting to see this discussion. The latest
thing in AM broadcasting is MDCL Modulation Dependent Carrier
Level. At 0% modulation carrier level is at full power. At
100% modulation carrier is at 50% of full power. It's supposed
to save money for high power broadcasters, and does save about
$300.00 a month for our 50 KW station WBAP but I haven't
noticed all that much of a saving at our 25 KW station KTCK so
I guess the jury is still out. The process is supposed to be
transparent to the listener and it is basically if you live in
a strong signal area but it does become apparent in the out
laying areas.</div>
<div><br>
</div>
<div>The Nautel transmitter at WBAP just required a plug and
play external controller to be added. The Harris / GatesAir
transmitter at KTCK required replacing one board and adding a
second board in the control cabinet plus some rewiring of
remote control connections.</div>
<div><br>
</div>
<div>Bill AD5OL</div>
<div><br>
</div>
<div id="ydpb6a32916yahoo_quoted_6856376992"
class="ydpb6a32916yahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial,
sans-serif;font-size:13px;color:#26282a;">
<div> On Sunday, May 20, 2018, 8:04:05 AM CDT, Kenneth G.
Gordon <a class="moz-txt-link-rfc2396E" href="mailto:kgordon2006@frontier.com"><kgordon2006@frontier.com></a> wrote: </div>
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<div dir="ltr">On 19 May 2018 at 23:44, <a
moz-do-not-send="true" shape="rect"
href="mailto:jerrylofstead@bellsouth.net"
rel="nofollow" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:jerrylofstead@bellsouth.net">jerrylofstead@bellsouth.net</a></a>
wrote:<br clear="none">
<br clear="none">
> Oh yes! Controlled carrier the RF level varies at a
voice rate.� DSB SC(supresed carier) was <br
clear="none">
> produced by putting two tubes in push-push...�
usually push pull grids and paralell plates.<br
clear="none">
<br clear="none">
<br clear="none">
<br clear="none">
<br clear="none">
vy 73,<br clear="none">
<br clear="none">
Ken W7EKB<br clear="none">
<br clear="none">
---<br clear="none">
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