Search found 589 matches

by RFWarrior
Mon Mar 26, 2018 9:48 am
Forum: Everything else
Topic: FUNCTION GENERATOR
Replies: 3
Views: 441

Re: FUNCTION GENERATOR

Trying not to make a sales pitch, but if you're working on any of our current transmitters (NX series AM and GV, NVLT or VS series FM), there is a signal generator built in as well. You can choose type (sine wave, band limited noise or sine sweep), as well as level (as a mod percentage, 0-100), freq...
by RFWarrior
Wed Mar 14, 2018 7:01 am
Forum: FM Radio
Topic: Nautel V15 GE power supply failure
Replies: 4
Views: 350

Re: Nautel V15 GE power supply failure

They had a very high failure rate and were replacing them under warranty. Have you called? Some rumors never die... We had a high failure rate with earlier TECTROL/CUI supplies used in the NV series. The failure rate with the GE/Lineage supplies used in the GV and NVLT series has historically been ...
by RFWarrior
Wed Mar 14, 2018 6:48 am
Forum: AM Radio
Topic: ground strap thickness
Replies: 10
Views: 498

Re: ground strap thickness

I had an electrical inspector recently require us to cut loose the connection between the transmitter reference ground and the service entrance panel ground. He said the service entrance can only be attached to a designated ground rod and nothing else. Your inspector was wrong. NEC 250.4 was revise...
by RFWarrior
Mon Feb 12, 2018 6:31 am
Forum: AM Radio
Topic: Audio Bandwidth of an AM Broadcast Station
Replies: 19
Views: 1176

Re: Audio Bandwidth of an AM Broadcast Station

ClearChannel / iHeartRadio stations seem to have been directed to go to 5 kHz bandwidth many years ago, and my annual Equipment Performance Measurement spectrums show that quite nicely. Pretty much any station running AM IBOC will be limiting analog audio to 5kHz - after several complaints of self-...
by RFWarrior
Wed Dec 20, 2017 8:38 am
Forum: FM Radio
Topic: RF Spectrum Analyzer
Replies: 26
Views: 1311

Re: RF Spectrum Analyzer

It is a regulatory agency within Canada, they are responsible for "Spectrum Management"; because of proximity to an airport, they are asking for more detailed scans. I'm thinking that the "2nd harmony" is referring to the second harmonic. I'd question this - Industry Canada has vans very well equip...
by RFWarrior
Fri Nov 24, 2017 9:19 am
Forum: FM Radio
Topic: Nautel NV20 repair/restoration
Replies: 19
Views: 2229

Re: Nautel NV20 repair/restoration

I am putting this thread in my reference file. For anybody with an interest, with Dave's permission, I copied his entire series of posts into my last Tips N Tricks article in our Waves newsletter - this was one of the most informative discussions on repair and restoration that I've seen in a long t...
by RFWarrior
Thu Nov 02, 2017 10:22 am
Forum: FM Radio
Topic: Nautel NV20 repair/restoration
Replies: 19
Views: 2229

Re: Nautel NV20 repair/restoration

Wouldn't it be nice if a B-I-G company like Nautel could acquire the schematic for these power supplies, so they COULD be repaired in the field. Probably would have made the repair job a whole lot easier and faster. Bob M. It really would be nice - more than you could imagine. Unfortunately, we've ...
by RFWarrior
Thu Oct 19, 2017 8:45 pm
Forum: FM Radio
Topic: New member - LPFM transmitter recommendations
Replies: 33
Views: 3402

Re: New member - LPFM transmitter recommendations

Obviously I'm late to this party - I need more hours in every day. :) I don't suspect you'll have any issue with the Ecreso, they're not bad from the very little I know about them. As mentioned, definitely for any Nautel questions, anybody can feel free to contact me - but the absolute best way is b...
by RFWarrior
Thu Oct 19, 2017 8:34 pm
Forum: FM Radio
Topic: Nautel NV20 repair/restoration
Replies: 19
Views: 2229

Re: Nautel NV20 repair/restoration

That's about the best description of Tectrol PS supply in the field that I've encountered... okay, not about the best, definitely the best! Mind if I borrow it for reference? Since we don't shop repair these, anything that I can find for helping folks fix them after the warranty is up is a very good...
by RFWarrior
Mon Aug 14, 2017 5:16 am
Forum: FM Radio
Topic: 6 KW Transmitter Ballpark price
Replies: 17
Views: 1998

Re: 6 KW Transmitter Ballpark price

A couple of additional comments on this: 1. Although Anabolic requested a 6kW transmitter, the specific TPO wasn't provided - that and any future HD radio compatibility could make a difference, one way or the other... 2. Also not provided was geographic location - this group has members from all ove...
by RFWarrior
Sun Jul 23, 2017 9:50 pm
Forum: Everything else
Topic: You need this
Replies: 22
Views: 2348

Re: You need this

He did something similar in Madison at the WBA Engineering Conference a half dozen or so years ago... it turned out, to the complete subjective, non-blind listening audience, barbed wire was a better audio cable than Monster anything. :D
by RFWarrior
Tue Jul 18, 2017 5:55 am
Forum: FM Radio
Topic: Static Dissipators?
Replies: 13
Views: 1637

Re: Static Dissipators?

I don't think they do a lot to prevent lightning strikes... there's a lot more physics involved there than a wire brush can solve. Where I do think they are very useful is to bleed off charge as the tower ionizes, minimizing the arcing across guy wire insulators and spark balls - intentional corona....
by RFWarrior
Tue Jul 18, 2017 5:48 am
Forum: FM Radio
Topic: Nautel NV10LT
Replies: 21
Views: 3483

Re: Nautel NV10LT

I just installed a new NV LT 7.5 rig,...I am trying to get control of the presets with a remote control unit. By taking the Preset 1 or 2 to ground via the JA plug on the back of the controller the transmitter does not change power levels. Am I missing something here? Thanks. Rich, give me a holler...
by RFWarrior
Fri May 19, 2017 10:16 am
Forum: FM Radio
Topic: Nautel NV10LT
Replies: 21
Views: 3483

Re: Nautel NV10LT

.. is there any service information available for the old Tectrol power supplies used in the NV series? From us, no - it was part of the agreement with the former Tectrol that service information wasn't part of the deal. I assume they didn't want us to start building them ourselves! However, CUI (c...
by RFWarrior
Tue Mar 14, 2017 12:50 pm
Forum: AM Radio
Topic: INTERNATIONAL CRYSTAL MFG
Replies: 14
Views: 1848

Re: INTERNATIONAL CRYSTAL MFG

Where will you go to get crystals now? Is Northern still around? We'd used them in the past here and there when International couldn't deliver in time. It's been well over 10 years since I've been sitting in that part of the facility, though, so no idea if they still exist or not. If not, it'll be ...