Search found 107 matches

by Lee_Wheeler
Mon Aug 13, 2018 7:33 pm
Forum: Radio Studio Engineering
Topic: PC based multi-band processor
Replies: 6
Views: 96

Re: PC based multi-band processor

I tried running an Optimod PC1101 into an 8100 when I had a 8500 go bad. The 8100 was basically a final clipper but it was still pretty grim sounding and uncompetitive. If you crank the modulation up to about 125% it does OK but I figured the guys at the field office, 1/4 mile away from the tower, m...
by Lee_Wheeler
Mon Aug 13, 2018 7:17 pm
Forum: FM Radio
Topic: 500w translator
Replies: 9
Views: 345

Re: 500w translator

K227BW, Pullman Wa. is 500w I have no explanation for that one. The CP application actually specifies 500 Watts and it was granted as such. Clearly it is a violation of 47 CFR 74.1235(a). I guess I will need to request a kilowatt on the next application that I prepare and see of they grant it. ...Lee
by Lee_Wheeler
Wed Aug 01, 2018 5:18 pm
Forum: FM Radio
Topic: Two soggy Heliax lines!
Replies: 7
Views: 240

Re: Two soggy Heliax lines!

The line that has been pressurized shouldn't have any water in it even if there is an air leak. So long as there is any positive pressure that will hold on the line water cannot get into it. On that line I would look elsewhere for the problem. The foam line will likely never return to normal if it w...
by Lee_Wheeler
Mon Jul 23, 2018 6:10 pm
Forum: FM Radio
Topic: Blower Motor Replacement Harris HT-10
Replies: 6
Views: 220

Re: Blower Motor Replacement Harris HT-10

If it uses the Rotron blowers the bearings cross to a GM alternator and you can get replacements at an auto parts store. I had those blowers in an old Sparta Aux years ago that sounded pretty ill and I just swapped out the bearings - sounded like new again. You have to be a bit careful with the brus...
by Lee_Wheeler
Mon Jul 23, 2018 6:04 pm
Forum: FM Radio
Topic: Processing Pre or Post STL?
Replies: 15
Views: 304

Re: Processing Pre or Post STL?

If the Optimod has analog or AES outputs (I assume it is something newer than an 8100) you can move it in front of the link no problems. You indicated that you are getting a new transmitter and I don't think there has been an exciter shipped in the last 15 years that can't take an analog or an AES s...
by Lee_Wheeler
Fri Jul 13, 2018 5:04 pm
Forum: FCC Discussion
Topic: possible ownership cap rule changes
Replies: 2
Views: 92

Re: possible ownership cap rule changes

I haven't seen it in a NPRM yet but then again I have only been paying attention the technical stuff, the translator interference NPRM and the C4 NOI.

Given that we are in mid July I can't imagine that it could get through Rule Making this year.

...Lee
by Lee_Wheeler
Wed Jul 11, 2018 5:20 pm
Forum: FCC Discussion
Topic: FCC Rules concerning transmitter site contracts, use, ownership, etc...
Replies: 6
Views: 262

Re: FCC Rules concerning transmitter site contracts, use, ownership, etc...

The only thing similar I have seen lately was a dispute where American Tower tried to throw Pacifica off of a tower (Empire State?) where they hadn't paid rent on for a Long, Long, Time. The Judge wouldn't let them evict but I think it got dealt with as a civil matter. Finding a signed lease would b...
by Lee_Wheeler
Sun Jul 08, 2018 3:34 pm
Forum: FM Radio
Topic: Bric-link
Replies: 5
Views: 285

Re: Bric-link

If this is going into a PPM market you need to have the PPM encoder behind the link or run it in a linear mode if the encoder has to be at the studio end.

The compressed audio formats do a wonderful job of stripping away the watermarking since "you can't really hear it anyway".

...Lee
by Lee_Wheeler
Sun Jul 01, 2018 12:25 pm
Forum: FM Radio
Topic: Inside the ECO-4
Replies: 7
Views: 270

Re: Inside the ECO-4

The initial turn on might be interesting. I had a situation where I called in to revive a dark station and the previous owners / engineer set traps everywhere out of spite. One of many was to crank the tuning and loading as far in the wrong direction as possible.

...Lee
by Lee_Wheeler
Fri Jun 01, 2018 7:40 pm
Forum: FM Radio
Topic: BCST ELECT MVDS SYSTEM
Replies: 5
Views: 208

Re: BCST ELECT MVDS SYSTEM

I had a couple of 35s, an A and a B, that had the MVDS and a few others that didn't have it. It had some utility but I seemed to have more trouble with the controller power supply on the ones that had the MVDS. Most of the power supply problems were due to the muffin fan seizing up and popping the f...
by Lee_Wheeler
Sun May 06, 2018 11:36 am
Forum: Ask the Engineers
Topic: STL Frequencies
Replies: 12
Views: 319

Re: STL Frequencies

In the continental United States, no. 47 CFR 74.432 (e) In Alaska, Guam, Hawaii, Puerto Rico, and the Virgin Islands, base stations may provide program circuits between the studio and transmitter or to relay programs between broadcasting stations. A base station may be operated unattended in accorda...
by Lee_Wheeler
Mon Mar 19, 2018 1:48 pm
Forum: AM Radio
Topic: GatesAir suspends AM TX sales (Radio World)
Replies: 33
Views: 1325

Re: GatesAir suspends AM TX sales (Radio World)

Just curious, beyond a few FM's going with lower gain antenna's and higher power TX's to clear tower space, and an even fewer that builds full power aux sites rather than lower power for RF exposure rules, how does the TV repack affect FM transmitter sales substantially? There are not that many. I ...
by Lee_Wheeler
Fri Mar 16, 2018 7:13 pm
Forum: Everything else
Topic: RadioWorld Magazine
Replies: 18
Views: 567

Re: RadioWorld Magazine

I got an email from them last week with a link to the most poorly constructed survey that I have ever seen. They wanted to rank how often you use various forms of media when researching equipment - on a 1 to 30 scale - with no guidance on which is more or less. If I use say Google a lot does it get ...
by Lee_Wheeler
Thu Mar 15, 2018 8:44 am
Forum: FM Radio
Topic: band pass filter recommendations
Replies: 12
Views: 366

Re: band pass filter recommendations

My RF Specialties guy has been selling my clients Shively cavities for the translators where the translator antenna is very close to another FM. They seem to work fine. They can be bought in single, double, or triple cavity versions and that decision is made based on the channel spacing between the ...
by Lee_Wheeler
Sun Mar 11, 2018 11:37 pm
Forum: AM Radio
Topic: ground strap thickness
Replies: 10
Views: 599

Re: ground strap thickness

Depending on the way the electricians and, more importantly, the inspectors read code then most broadcast operations can be out of compliance. Code wants one, and only one, bond between ground and neutral and that bond is to be located in the main service entrance panel. Adding ground straps off of ...