Search found 3361 matches

by Deep Thought
Thu Oct 18, 2018 8:49 am
Forum: AM Radio
Topic: Gates 5 rebuild
Replies: 6
Views: 204

Re: Gates 5 rebuild

Otherwise, the basics apply to this rig... keep it clean, keep it cool, visit it once in a while. They also really *really* don't like open delta power feeds. One client was replacing fuses and FETs on a monthly basis until they installed a delta-to-wye transformer and haven't had a major problem s...
by Deep Thought
Wed Oct 10, 2018 9:16 am
Forum: FCC Discussion
Topic: Does the FCC keep track somewhere of subchannels?
Replies: 3
Views: 114

Re: Does the FCC keep track somewhere of subchannels?

The FCC only tracks stations running in a digital mode (assuming you're talking about FM) and not how many or what is on the subchannels.

Digital TV is licensed as such, but the FCC does not track the 'dot' channels deployment.
by Deep Thought
Sat Oct 06, 2018 12:07 am
Forum: Everything else
Topic: RING MY BELL
Replies: 21
Views: 401

Re: RING MY BELL

It was the ones used for the phones, I believe, so although it was very close to the two-tone EAS alert it wasn’t the actual thing. So I wasn’t sure if that was a violation, but affiliates sure did. Heard of one that pulled all newscasts for the rest of the day until they got assurances. Anything t...
by Deep Thought
Tue Oct 02, 2018 11:57 am
Forum: Ask the Engineers
Topic: Dead Relio Revived
Replies: 13
Views: 424

Re: Dead Relio Revived

Sometimes it helps to pre-heat the PCB (if possible) before attempting to desolder these components. I have used my heat gun to warm up the bottom side of the PC board to just hot enough to hurt a bit when touched with a bare finger and then attacked the pad with a desoldering iron. It makes things...
by Deep Thought
Wed Sep 19, 2018 9:37 am
Forum: AM Radio
Topic: Retune Harris DX10
Replies: 7
Views: 370

Re: Retune Harris DX10

Data point: As of about two months ago Nautel was selling their current-production NX-10 for about $42,000 "street price". This box includes MDCL as a standard feature which can meaningfully reduce your electric bill. While that is probably considerably more than you have invested in the DX-10 it ma...
by Deep Thought
Tue Sep 18, 2018 5:56 pm
Forum: AM Radio
Topic: Retune Harris DX10
Replies: 7
Views: 370

Re: Retune Harris DX10

What frequency is it on and what frequency do you need it tuned to?

It is possible to do it but you'll need the proper test equipment and possibly some replacement parts.
by Deep Thought
Tue Sep 18, 2018 11:30 am
Forum: AM Radio
Topic: Crystal alternative
Replies: 17
Views: 933

Re: Crystal alternative

That said, if you're using something like what I'm reading the ProgRock to be, might be easier just to run it at your carrier frequency, use it as the source for a differential amplifier with a 15V rail and jumper the transmitter to use the external RF drive source. Easy enough to do and removes an...
by Deep Thought
Fri Sep 14, 2018 12:52 pm
Forum: AM Radio
Topic: Crystal alternative
Replies: 17
Views: 933

Re: Crystal alternative

Micheal Paton from Baton Rouge, La. had a device for some of the Harris AM transmitters. I think he said it could be set via dip switch to output a frequency of .5 to 5Mhz. I saw the board he had at the Alabama Broadcasters Association convention and it looked professionally made and the price wasn...
by Deep Thought
Thu Sep 13, 2018 10:52 am
Forum: AM Radio
Topic: Crystal alternative
Replies: 17
Views: 933

Re: Crystal alternative

kcbooboo wrote:
Thu Sep 13, 2018 5:26 am
There's a very inexpensive synthesizer / oscillator called the ProgRock,
That's the one I'm using with some outboard interface electronics. It can be GPS-disciplined and once the parameters are stored in NVRAM it is very stable.
by Deep Thought
Fri Sep 07, 2018 10:31 pm
Forum: AM Radio
Topic: Crystal alternative
Replies: 17
Views: 933

Re: Crystal alternative

The device I am using has very low phase noise, which is what makes it usable for this.
by Deep Thought
Wed Sep 05, 2018 9:51 pm
Forum: FM Radio
Topic: Synchronizing FM over IP?
Replies: 11
Views: 525

Re: Synchronizing FM over IP?

DaveSt wrote:
Wed Sep 05, 2018 9:00 pm
The best advice for a SFN is that you should only ever do it if there are no other options.
Indeed. I think I would opt for moving the LPs instead, or if the coverage does indeed overlap, just turn in the licenses.
by Deep Thought
Wed Sep 05, 2018 8:38 pm
Forum: FM Radio
Topic: Synchronizing FM over IP?
Replies: 11
Views: 525

Re: Synchronizing FM over IP?

About the only viable way to do this is to sync the RF via GPS and deliver the audio via satellite or private ethernet/fiber so each path is essentially identical and consistent. You will never be able to keep the audio stable over the Internet. A few tens of milliseconds shift in the path delay wil...
by Deep Thought
Tue Sep 04, 2018 10:24 pm
Forum: STL Engineering
Topic: TFT 9107 STL receiver PLL switch info
Replies: 1
Views: 341

Re: TFT 9107 STL receiver PLL switch info

Here ya go...
by Deep Thought
Tue Sep 04, 2018 10:21 pm
Forum: AM Radio
Topic: Crystal alternative
Replies: 17
Views: 933

Re: Crystal alternative

I'm working on a synthesized, GPS-disciplined replacement that would attach to the transmitter via its AM stereo exciter input jack, but due to real life getting in the way it is several months from market.
by Deep Thought
Fri Aug 31, 2018 7:24 pm
Forum: Ask the Engineers
Topic: Cablewave Part No. - N Female for FLC78-50
Replies: 9
Views: 212

Re: Cablewave Part No. - N Female for FLC78-50

I may be wrong but I think that the solid center connector may work on the hollow center but obviously not vice-versa... Do they supply the little brass slug to put into the center conductor so the spring fingers on the solid conductor connector fit? I know the clamped terminations used for AM ATUs...