[AMRadio] WTAG 580 IBOC off for the 2nd day in a row

Wed Sep 15 14:53:08 EDT 2010

 It's a Harris 3DX-50 masquerading as a 25. I was campaining for a Nautel NX-25 
but apparently the company has an agreement with Harris. 

I did pitch a S... Fit because I have had my hands on two other 3DX-50's and 
they were maintenance nightmares and Harris is real proud of replacement parts. 
I also brought up the fact that distortion on switch mode transmitters goes way 
up at reduced power (we go to 2.3 K at night). Harris ran tests and initially 
found distortion shot up to 16% and were shocked. Geoff Mendenhall and Ky Lu 
went out into the factory and ginned up a 25 Kw rig with all the modules of a 50 
present but operating at half power to reduce the step size of the waveform and 
then wrote some new software which may become the standard release which reduces 
distortion to 0.4% at 2.3 Kw. I frankly have NEVER seen Harris get off their 
butts and do something like that. I'm kind of amazed......... We also made them 
extend the warranty period to 4 years so I guess we'll see how it works. I did 
get a full set of spares.

Bill

________________________________
From: Brian - KF5CCN <bzwiener at sbcglobal.net>
To: Discussion of AM Radio in the Amateur Service <amradio at mailman.qth.net>
Sent: Wed, September 15, 2010 1:04:51 PM
Subject: Re: [AMRadio] WTAG 580 IBOC off for the 2nd day in a row

What make an model transmitter is it?BrianKF5CCN

--- On Wed, 9/15/10, BILL GUYGER <bguyger at sbcglobal.net> wrote:

From: BILL GUYGER <bguyger at sbcglobal.net>
Subject: Re: [AMRadio] WTAG 580 IBOC off for the 2nd day in a row
To: "Discussion of AM Radio in the Amateur Service" <amradio at mailman.qth.net>
Date: Wednesday, September 15, 2010, 11:56 AM

No idea, but I have turned AM IBOC off on KLIF, and am going to resist turning 
it on period on KTCK when I get finished with all the details of a power upgrade 

from 9 Kw. to 25 Kw. unless I receive a direct order. 

I have no real problem with FM IBOC but the AM codec SUCKS! It sounds like a bad 

MP3 and commits "legal" willful and malicious to stations on either side locally 

and to on channel stations via sky wave at night which is why the FCC initally 
allowed it only during the day. In the North East where population density is 
high some stations were interfering with other stations owned by the same 
company in other towns. That's why a lot of owners have turned IBOC off.

Bill AD5OL

________________________________
From: Bob Young <youngbob53 at msn.com>
To: amradio at mailman.qth.net; am at nrcdxas.org
Sent: Tue, September 14, 2010 11:24:53 AM
Subject: [AMRadio] WTAG 580 IBOC off for the 2nd day in a row

This is a daytime IBOC only station, they have tried it at night and had some 
kind of problem, does anyone know just how long it's been off?

Bob Young
Analog, MA

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