Search found 3102 matches

by Deep Thought
Tue Apr 25, 2017 8:36 am
Forum: FM Radio
Topic: New Sound Board
Replies: 5
Views: 97

Re: New Sound Board

Adding to the excellent advice already given...how "live" is your live station? There is a huge difference in use and abuse with a station running truly live 24/7 with one which runs live a couple hours per day. In that regard, you truly get what you pay for as the more pricey boards are the product...
by Deep Thought
Tue Apr 25, 2017 8:27 am
Forum: FM Radio
Topic: Vertical or Circular polarization FM Broadcast
Replies: 4
Views: 62

Re: Vertical or Circular polarization FM Broadcast

I recently helped a 250 watt translator diagnose and fix a problem they were having. The station had installed a vertical-polarized log periodic antenna for transmit and was suffering from close-in co-channel interference on some car radios from a class-A station located more than 40 miles away. Lon...
by Deep Thought
Tue Apr 11, 2017 6:35 pm
Forum: FM Radio
Topic: RBDS Phase
Replies: 4
Views: 180

Re: RBDS Phase

The only external ones I've dealt with wanted a pilot sample to work from, and generated it from that. They loop through after the stereo generator, no adjustment necessary.
by Deep Thought
Tue Apr 11, 2017 7:58 am
Forum: AM Radio
Topic: MW10B-A little help?
Replies: 16
Views: 641

Re: MW10B-A little help?

I know this isn't really on topic, but maybe it will help you or someone else later... A client replaced a MW-10 with a Nautel XR-12 awhile ago thinking that it would pay for itself in about 5-6 years with savings on the electric bill. Between the electrical savings, the elimination of tube replacem...
by Deep Thought
Mon Apr 03, 2017 4:31 pm
Forum: FM Radio
Topic: ERI .78 spacing
Replies: 9
Views: 319

Re: ERI .78 spacing

Without knowing the whys of people's opinions it is almost impossible to even comment here. What are the applications? Why did they decide to use a 1/2-wave spaced antenna (or a full wave spaced, or a 0.78 wave spaced)? Like everything else inter-bay spacing is a design parameter which is influenced...
by Deep Thought
Mon Apr 03, 2017 9:19 am
Forum: Everything else
Topic: Cumulus buys Gates Air Transmitters
Replies: 9
Views: 432

Re: Cumulus buys Gates Air Transmitters

Think of it as electrons and 'holes'. Both are necessary for current flow. :)

The problem occurs when there are too many holes and not enough electrons to fill them.
by Deep Thought
Sat Apr 01, 2017 1:39 pm
Forum: FM Radio
Topic: Tower Move Question
Replies: 1
Views: 135

Re: Tower Move Question

If you are talking about a domestic (US) station, PM the information to me and I'll check it for you.
by Deep Thought
Mon Mar 20, 2017 1:18 pm
Forum: Ask the Engineers
Topic: TFT 3320 CAP converter
Replies: 5
Views: 209

Re: TFT 3320 CAP converter

Considering that TFT is TFTs up and there is no support for any of their stuff anymore, your advice to get something else is probably the wisest path.
by Deep Thought
Tue Mar 14, 2017 10:22 pm
Forum: STL Engineering
Topic: Harris CD Link
Replies: 12
Views: 493

Re: Harris CD Link

And they wonder why no one wants to buy their stuff anymore. That ship sailed awhile ago. About 10 years back a client took a lightning strike and called Harris for parts to repair their Gates 1. They were only 60 miles from Quincy and wanted to drive over to pick them up. Harris tech support said ...
by Deep Thought
Thu Mar 09, 2017 5:48 pm
Forum: FM Radio
Topic: STL dropouts....back today
Replies: 23
Views: 1046

Re: STL dropouts....back today

I'm pretty sure that was suggested last time we discussed it.
by Deep Thought
Thu Mar 02, 2017 1:11 pm
Forum: FM Radio
Topic: High Pitched Tone in FM Audio?
Replies: 23
Views: 1016

Re: High Pitched Tone in FM Audio?

Given Gates Air's less-than-competent web presence, I would just call 'em.

(217) 222-8200
by Deep Thought
Thu Mar 02, 2017 11:55 am
Forum: FM Radio
Topic: High Pitched Tone in FM Audio?
Replies: 23
Views: 1016

Re: High Pitched Tone in FM Audio?

Does it go away when you switch the stereo generator to mono? Are you running any SCAs? RBDS? Older Optimods were notorious for the power supplies having high frequency oscillations which would show up as birdies in stereo, but you say you changed out the processor already. This should be showing up...
by Deep Thought
Mon Feb 27, 2017 7:29 pm
Forum: FCC Discussion
Topic: FCC AM Database
Replies: 8
Views: 422

Re: FCC AM Database

Using the ant_sys_id #1 (WYCL, Niles, OH) as an example...the data in each record is pipe delimited, making it easy to import into just about anything. DAD|1|153|9||A||||||D|41|N|7|56.000000|80|W|45|40.000000||Y|0.500000|221.600000||204.390000|3|C|131.132000|260.761000|BDF52AC0009B3518|L|||Y||||02/1...
by Deep Thought
Mon Feb 27, 2017 7:15 pm
Forum: FCC Discussion
Topic: FCC AM Database
Replies: 8
Views: 422

Re: FCC AM Database

Since this was originally designed to be an engineering database ant_sys_id is the primary key field (index) in the am_ant_sys table and for any record which contains technical data and each one is unique. A DA-2 station would have two am_ant_sys entries, one day and one night. Usually they are sequ...
by Deep Thought
Mon Feb 27, 2017 10:27 am
Forum: FCC Discussion
Topic: FCC AM Database
Replies: 8
Views: 422

Re: FCC AM Database

I wrote mine when they were still on the old VAX system and then updated it in 2000 when CDBS replaced that. One of these days I should re-do it in something that doesn't require DOSBOX to run it. :mrgreen: The tables and data are text files, and the index associations are published. It's non-trivia...