Search found 614 matches

by TPT
Thu Jul 20, 2017 4:23 pm
Forum: Everything else
Topic: Mounting stuff to old concrete block wall?
Replies: 16
Views: 609

Re: Mounting stuff to old concrete block wall?

Twist-lock socket on a little 600 watt RF amplifier. Couldn't find the same brand plug--but I knew the current rating required. Picked different brand up--wouldn't fit--just slightly different. Ended up changing the socket.
by TPT
Thu Jul 20, 2017 8:24 am
Forum: Everything else
Topic: You need this
Replies: 22
Views: 727

Re: You need this

A floating, or always on UPS (which is probably what that "ac regenerator" is) does have its uses. Not at that price, though! Had a problem with sporadic pulses coming in the power line at one studio. Actually showed up in the FM band--listening on a car radio under the power lines...but not on AM (...
by TPT
Thu Jul 13, 2017 5:38 pm
Forum: Ask the Engineers
Topic: EAS Tones - Specification Source ?
Replies: 2
Views: 114

Re: EAS Tones - Specification Source ?

47 cfr Sections 11.31 through 11.35.

Go to ecfr.gov select Title 47 then select parts 0-19 then chapter 11 and you can find these sections.
by TPT
Thu Jul 13, 2017 6:11 am
Forum: Ask the Engineers
Topic: Offical AMC 8 Transition Thread (was Sat. AMC-8)
Replies: 148
Views: 7267

Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

We have a pair of stations run off STORQ systems (which update from either satellite or internet), as well as several conventional satellite receivers for various programs (Delilah, Alice Cooper). About 6 months ago the old LNB started to fail, was bugging our DAWNCO splitter/DA so we put in an old ...
by TPT
Mon Jul 10, 2017 5:59 am
Forum: Radio Studio Engineering
Topic: No sound onair after fading in Outside Broadcast feed
Replies: 5
Views: 227

Re: No sound onair after fading in Outside Broadcast feed

Yes--sounds like a phase reversal. Understand in stereo broadcasting the audio fed into the transmitter consists of a mono main channel signal ( the Left and Right channel added in phase) and a Left and inverted Right (-R) signal fed into the stereo subcarrier. So... Let's assume the remote broadcas...
by TPT
Tue Jul 04, 2017 8:24 pm
Forum: FM Radio
Topic: LTE cell sites
Replies: 1
Views: 261

LTE cell sites

Recently had to spend a day baby-sitting an A.T. & T crew and contractor at a combined FM/cell site. 220 ft. guyed tower, with 4 bay FM non-com & several cell services at the top of the tower. Carriers in the 700~1900~2100~2300 bands plus other equipment operating in 800 mhz. Seems the FM signal was...
by TPT
Fri Jun 30, 2017 6:41 am
Forum: Radio Studio Engineering
Topic: EAS Issue
Replies: 13
Views: 649

Re: EAS Issue

The PPM encoder runs a series of tones--somewhere in between 2~4 khz--which are embedded in dense audio (which explains why news/talk and smooth jazz stations don't do well in PPM markets). Speculating--it may be the masking algorithm which allows the hiding of the tones in dense music is mangling t...
by TPT
Sat Jun 24, 2017 8:59 am
Forum: Radio Studio Engineering
Topic: EAS Issue
Replies: 13
Views: 649

Re: EAS Issue

With two stations and one EAS box, we use the Broadcast Tools switchers for EAS alerts. The Sage, (in this case) sends out a closure that switches a pair of 2X1 BT switchers from the program lines to the audio output of the Sage. The EOM switches the program lines back on. Only problem I've had is w...
by TPT
Thu Jun 22, 2017 5:51 am
Forum: FM Radio
Topic: RBDS Phase
Replies: 7
Views: 519

Re: RBDS Phase

Why? The RDS subcarrier is at 57 khz (3X19)--but why should the relative phase of the pilot and RDS matter?

Have two Nautels with internally generated RDS, both fed from external composite sources (Omnia 3T locally for one, Omnia One through a 25 mile STL path for the other. Never saw a problem.
by TPT
Thu Jun 08, 2017 4:30 pm
Forum: AM Radio
Topic: Burk ARC-16 ESI Card
Replies: 7
Views: 358

Re: Burk ARC-16 ESI Card

Have two sites using a "home phone" cell unit and a Sine with success. These are Verizon cell phones with a telephone jack and external antenna. Interestingly, the A.T. & T version doesn't work--Sine won't answer.
by TPT
Thu Jun 08, 2017 6:54 am
Forum: Ask the Engineers
Topic: Offical AMC 8 Transition Thread (was Sat. AMC-8)
Replies: 148
Views: 7267

Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Factory. It's kind of a dense plastic, but after a number of years of sun, wind, ice, and more sun it got a bit brittle.
by TPT
Wed Jun 07, 2017 3:21 pm
Forum: FCC Discussion
Topic: translator window
Replies: 2
Views: 165

translator window

So you are in a small market with just a few stations...and you thought, why pay big $$$ to buy a translator when I can wait until next year and just apply for one? FCC got you. The next translator window is only a week--July 26th to the 2nd of August. It is first come/first served, but if you are M...
by TPT
Wed Jun 07, 2017 6:30 am
Forum: Everything else
Topic: RECYCLE OLD SAT DISHES
Replies: 4
Views: 252

Re: RECYCLE OLD SAT DISHES

I'll think I'll just flip mine on its back, seal it well, and let it fill up with water.

Bird bath for the buzzards.
by TPT
Tue Jun 06, 2017 5:46 pm
Forum: Ask the Engineers
Topic: Offical AMC 8 Transition Thread (was Sat. AMC-8)
Replies: 148
Views: 7267

Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

Why I replaced my Comtech--our LNB mount is also split where the set screw runs. We glued it, so it is stable at the moment, but no sense in fighting this on a 35 year old dish. I understand there is a replacement available--for $1K.