Search found 54 matches

by Ray
Sat Aug 25, 2018 3:01 pm
Forum: Radio Studio Engineering
Topic: WVRC-8 Plus Site Control Setup Configuration Questions
Replies: 1
Views: 126

WVRC-8 Plus Site Control Setup Configuration Questions

1) Is it possible to change the relay state via the telephone dail-in with the relay output latch option (not pulse)? I can select either pulse or latch via the web interface but it seems that the telephone only has "pulse" support for the relay drive state? 2) Does the WVRC-8 plus version support S...
by Ray
Mon Jul 16, 2018 6:23 am
Forum: FM Radio
Topic: Remote Control Recommendcations
Replies: 13
Views: 547

Re: Remote Control Recommendcations

I was evaluating the same thing about 6 months ago. I was trying to decide between the Circuit Werks and WVRC-8. Found a used WVRC-8 on ebay that I sent back to Broadcast Tools to convert to the plus model. The on-site upgrade kit is $100 and they will upgrade it at the factory for $150. I've been v...
by Ray
Wed May 16, 2018 6:50 am
Forum: Ask the Engineers
Topic: C-band TI
Replies: 21
Views: 618

Re: C-band TI

The usual C-band radar band is 5.4-5.9 GHz. Many use up to 1.5 MW peak power. You might could do a quick site RF survey with a SA and a standard gain horn (with a LNA). If it is in-band, you may have to even install a diffraction fence. We had to do this last month for a new uplink station we own. I...
by Ray
Sun Apr 29, 2018 12:13 pm
Forum: Radio Studio Engineering
Topic: Software to control Broadcast Tools 8x2 Audio Switcher
Replies: 8
Views: 898

Re: Software to control Broadcast Tools 8x2 Audio Switcher

I've used a few of these with good results. Never had a failure. I didn't know about the software (thanks for the info) , but the RS232 interface is easy to program. They had a model 44.22 version that was discontinued recently. This version has four AES digital inputs and four analog inputs that yo...
by Ray
Fri Mar 23, 2018 6:45 am
Forum: TV Engineering
Topic: Transmitter Nitrogen Issue
Replies: 25
Views: 724

Re: Transmitter Nitrogen Issue

There is a product called Snoop that is similar to the Bubble soap that works well. I think Snoop is more sensitive than bubble soap. I've used both; I use the Snoop if I have it, otherwise it is a trip to the toy store for bubbles. We also have an electronic air leak detector that works OK (some fo...
by Ray
Wed Feb 21, 2018 7:20 am
Forum: Radio Automation Systems
Topic: Rivendell Radio Automaiton
Replies: 20
Views: 4528

Re: Rivendell Radio Automaiton

I spent lots of time looking at Automation software a couple of years ago. Many folks really like the Rivendell and think it is stable. The price is also really good (free). I'm not an IT expert and was worried about the setup and support however. If you have the time/experience, it might be a good ...
by Ray
Wed Feb 14, 2018 7:32 am
Forum: FM Radio
Topic: Singling out 2 stations on same frequency
Replies: 32
Views: 2381

Re: Singling out 2 stations on same frequency

I was wondering why predicted (50/50) interference contours do not correlate almost exactly with predicted signal strength predictions. For interference calculations, power seems to be more important than height. It seems to me that if the flux density for the 60 dB contour is the same with the FCC ...
by Ray
Sat Jan 27, 2018 5:53 pm
Forum: FM Radio
Topic: Connector suppliers....
Replies: 14
Views: 763

Re: Connector suppliers....

I needed some 7/8 diam and 1 1/4 diam Heliax type cables a couple of weeks ago. I was having trouble with Commscope having obsoleted several of the connectors we needed like 7/8 EIA and 7/16 DIN for the new AVA5 and AVA6. The folks at RF Parts recommended a Heliax type cable from a company called Eu...
by Ray
Tue Jan 16, 2018 12:12 pm
Forum: FCC Discussion
Topic: Revitalized AM Translators
Replies: 16
Views: 683

Re: Revitalized AM Translators

I've been listening to a new translator that just signed on. It appears that the licensee on the CP must have sold the CP to another local station. The translator is repeating another local AM station different than that on the CP. The owners of two stations are also different. It seems to me that a...
by Ray
Fri Dec 22, 2017 9:40 am
Forum: FM Radio
Topic: RF Spectrum Analyzer
Replies: 26
Views: 1788

Re: RF Spectrum Analyzer

I know one engineer that has not been so fortunate in marriage. He has been married about five times now. Being a real engineer , he says he is currently married to wife 3.2 (third wife, revision two). I suppose we got off-topic on this one. I hope everyone has a great Christmas and maybe Santa will...
by Ray
Tue Nov 07, 2017 4:38 pm
Forum: FM Radio
Topic: OMB GP-6
Replies: 11
Views: 880

Re: OMB GP-6

The phase kit is home-made. Several good articles about how to use a double balanced mixer with a 2-way power divider to provide a output voltage proportional to the relative phase between the two signals at the LO and RF ports of the mixer. I have several lengths of RF cable cut and calibrated on m...
by Ray
Fri Nov 03, 2017 8:35 am
Forum: FM Radio
Topic: OMB GP-6
Replies: 11
Views: 880

Re: OMB GP-6

Here are some random ideas. I know you have lots of experience with this type of problem. It looks like the Heliax is bent very close to the connectors in a couple of cases. I've seen the shield fracture many times when this happens causing intermittent VSWR problems. I've had to travel half-way aro...
by Ray
Sun Oct 01, 2017 4:52 pm
Forum: FM Radio
Topic: New member - LPFM transmitter recommendations
Replies: 33
Views: 4023

Re: New member - LPFM transmitter recommendations

Your right as usual. I heard they were using a Chinese transmitter (no FCC certification at all) and had a spur in the aviation band. Why anyone would try this for any period of time is beyond me. I have heard of folks using them in an emergency for less that 24 hours. Nothing gets action faster fro...
by Ray
Sun Oct 01, 2017 9:20 am
Forum: FM Radio
Topic: New member - LPFM transmitter recommendations
Replies: 33
Views: 4023

Re: New member - LPFM transmitter recommendations

The older Crowns have a reputation for being very robust. The Crown story is very interesting and they are very good folks. I assume that this unit is LPFM certified by the FCC? I don't see this specifically listed on the brochure. LPFM transmitters have to be sent into the FCC to be certified unlik...
by Ray
Fri Sep 15, 2017 6:36 am
Forum: FM Radio
Topic: New member - LPFM transmitter recommendations
Replies: 33
Views: 4023

Re: New member - LPFM transmitter recommendations

I've always thought Nautel really goes the extra mile for customer service. They were one of the few vendors that came down for our state broadcasting convention last month. Jeff has always answered my emails in a matter of hours (at most). They have webinars several times a year that are really hel...