Search found 548 matches

by Kelly
Mon Jun 22, 2020 8:04 am
Forum: FM Radio
Topic: Exciter shopping
Replies: 15
Views: 1149

Re: Exciter shopping

I know budgets are tight, finding myself cringing recalling some of those haunting exciter model numbers. In my view, the Harris THE1 was one of the worst exciters ever built. Terrible audio specifications and prone to having the oscillator unlocking of you pass too low of frequency audio. The audio...
by Kelly
Tue Jun 09, 2020 12:24 pm
Forum: FM Radio
Topic: Harris FM 20 K pro and con views
Replies: 16
Views: 864

Re: Harris FM 20 K pro and con views

According to Bob Brown its a miner change most of it done with use of a ruler inside the PA cavity . That may be, but ChuckG, the one who said it was quite difficult, isn't some amateur. He's a very well experienced and known engineer in the trade. He doesn't speak from just guessing. So take his w...
by Kelly
Thu Jun 04, 2020 2:24 pm
Forum: FM Radio
Topic: Harris FM 20 K pro and con views
Replies: 16
Views: 864

Re: Harris FM 20 K pro and con views

I going to re tune our QEI 10,000 its been running ok at another station . So I'll give it new life at this station with lower power see how long it last. How far (frequency wise) are you moving it? "Wait, I have to do something to change frequencies??" This guy was on a different discussion board ...
by Kelly
Mon Apr 27, 2020 3:25 pm
Forum: AM Radio
Topic: WNPV Lansdale PA
Replies: 4
Views: 628

Re: WNPV Lansdale PA

Wow, a two pattern three tower Class B at 1440 with 500W at night? Ugh, I can see where that wouldn't be very appealing to a prospective new owner. Especially true these days.

So, what's the story on it's demise? TX site property value more than the station is worth?
by Kelly
Thu Apr 23, 2020 7:54 am
Forum: FM Radio
Topic: Harris THE-1 stereo Pilot issue
Replies: 8
Views: 366

Re: Harris THE-1 stereo Pilot issue

Jim Sofonia wrote:
Thu Apr 23, 2020 6:34 am
Ummn.. What is a "David" ?
Two different vintages:
https://www.inovonicsbroadcast.com/product/716

https://www.bswusa.com/Broadcast-On-Air ... gL8TvD_BwE
by Kelly
Mon Mar 30, 2020 12:41 pm
Forum: STL Engineering
Topic: Harris CD Link
Replies: 3
Views: 887

Re: Harris CD Link

Have you connected it to a known good 50 ohm load? High VSWR is an unusual internal thing to go wrong.
by Kelly
Thu Mar 12, 2020 7:43 am
Forum: FM Radio
Topic: QEI 690 Mod Monitor issue
Replies: 3
Views: 538

Re: QEI 690 Mod Monitor issue

The electrolytic capacitors in the IF board have probably dried out. May have to just shotgun all the caps.
QEI always used the cheapest components with all their products. The fact that monitor has run this long is unusual.
by Kelly
Sat Feb 15, 2020 4:32 pm
Forum: Digital Television
Topic: Cisco DCM D9900/D9901/D9902 (EOL)
Replies: 1
Views: 338

Re: Cisco DCM D9900/D9901/D9902 (EOL)

Even though EOL, some Cisco resellers will still have access to the O.S. library.
May have to shop around to resellers to find one that won't just try to sell you replacement hardware.
by Kelly
Sat Feb 15, 2020 4:29 pm
Forum: TV Engineering
Topic: TV Transmitter question
Replies: 1
Views: 470

Re: TV Transmitter question

Here's a link to what's left of their website: https://www.electronicconnectors.net/e-l-marsden-wireless-inc/ I believe Marsden imported and re-branded these transmitters from Chile. Remember seeing one at a site probably six years ago. Pretty sure it was used as a backup for an LPTV at the same sit...
by Kelly
Fri Jan 24, 2020 9:26 am
Forum: FM Radio
Topic: HD Portable Radio with split audio capability
Replies: 5
Views: 602

Re: HD Portable Radio with split audio capability

None that I've ever seen. Usually I'll take two portable radios to the TX site, one analog and one HD-capable. Fire them both up and see how far things are off.
by Kelly
Thu Jan 16, 2020 9:55 am
Forum: FM Radio
Topic: optimod 2300 boots to blank screen
Replies: 9
Views: 753

Re: optimod 2300 boots to blank screen

That sounds like it's not even booting-up. Like anything else, many of the failures like this are power supply-related. Might be a dead +5V supply.
by Kelly
Thu Jan 02, 2020 4:29 am
Forum: AM Radio
Topic: Gates 5--no audio
Replies: 28
Views: 1601

Re: Gates 5--no audio

Before I attempt surgery on the PDM geni board, could the audio be vanishing beyond this point? Another question--if I haul my old and very heavy scope up the hill and look at the output of the PDM geni baord, would I be able to see audio at this point, or just the 60 KHZ? If your PWM stopped, then...
by Kelly
Thu Dec 26, 2019 7:53 am
Forum: AM Radio
Topic: AM Digital NPRM
Replies: 54
Views: 2973

Re: AM Digital NPRM

The Large Corporate Groups may have a few "throw away" medium wave stations that they could afford to play with Digital Modulation on. But I don't see them abandoning a revenue producing AM modulated station just to experiment, the profit margins on radio are a bit too thin for that. Hubbard did th...
by Kelly
Tue Dec 24, 2019 11:29 am
Forum: AM Radio
Topic: AM Digital NPRM
Replies: 54
Views: 2973

Re: AM Digital NPRM

I thought we were going to keep this technical and not inject politics. Not sure where you see politics in my comment. Right Wing talk? Since Air America isn't on the radio, let alone any AM stations anymore, there is no Left Wing Talk that I'm aware of to balance out labeling the format. The label...
by Kelly
Sun Dec 22, 2019 3:47 pm
Forum: AM Radio
Topic: AM Digital NPRM
Replies: 54
Views: 2973

Re: AM Digital NPRM

I don't know about the rest of you but I'm an Old Fart with reduced hearing. My belief is that most AM listeners are somewhat that same category. So having a "wide" audio response in this proposed AM Digital Mode isn't a necessity. Anything above 7.5K is wasted. I suspect that most self-described "...