Search found 301 matches

by grich
Mon Aug 14, 2017 2:48 pm
Forum: AM Radio
Topic: DX-10 Controller Probs
Replies: 9
Views: 482

Re: DX-10 Controller Probs

I know nothing of the DX series but I had step-start issues (as I suspect many did...there was a bulletin about it) with their SX boxes when the aux contacts on the contactors got cruddy and would not report closure to the controller.
by grich
Mon Aug 14, 2017 2:44 pm
Forum: AM Radio
Topic: DX-10 Controller Probs
Replies: 9
Views: 482

Re: DX-10 Controller Probs

I didn't think it was that old either....but there's this: https://www.desmoinesbroadcasting.com/kioa/harris-dx10.html Says the prototype went on air in September 1987, or very nearly 30 years ago. Back to the topic, I assume you have checked all PS voltages and shaken the big blue caps to see if t...
by grich
Tue Aug 01, 2017 11:35 am
Forum: FM Radio
Topic: EAS Antenna Issue
Replies: 13
Views: 749

Re: EAS Antenna Issue

Wow. I don't know if you'll find one. With Samco's five-element yagi, at 45 degrees the gain is only 1.5 dB below the level at the peak of the main lobe.

Might need a tight filter.
by grich
Thu Jul 13, 2017 12:51 pm
Forum: Ask the Engineers
Topic: Offical AMC 8 Transition Thread (was Sat. AMC-8)
Replies: 149
Views: 7951

Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

...Then WW1 started pressuring affiliates to get back on a satellite feed because their servers couldn't handle all the stations running off internet feeds... I was figuring that would happen. :roll: I guess if I were a jerk at WW1, I would compile a list of receivers that were a-never tuned to AMC...
by grich
Wed Jun 28, 2017 3:01 pm
Forum: AM Radio
Topic: Daytime Impedance high?
Replies: 26
Views: 1641

Re: Daytime Impedance high?

Hopefully the original problem doesn't become moot as a tornadic thunderstorm threatens the KMA tower site here in the next few minutes...
by grich
Mon Jun 19, 2017 10:34 am
Forum: AM Radio
Topic: RFI-Resistant USB Audio Interface
Replies: 6
Views: 443

Re: RFI-Resistant USB Audio Interface

Good place for a 111C repeat coil. Ground the electrostatic shield terminal. Lots of terminal space to solder in the MOV's.
by grich
Fri Jun 02, 2017 4:21 pm
Forum: Ask the Engineers
Topic: Offical AMC 8 Transition Thread (was Sat. AMC-8)
Replies: 149
Views: 7951

Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

KPJL FM wrote:
Fri Jun 02, 2017 7:27 am
Replace the 31 yo with an older guy...
Indeed...at 55, I was the youngest of the foursome that lifted our ring onto the pipe. :D
by grich
Fri Jun 02, 2017 4:19 pm
Forum: Ask the Engineers
Topic: Offical AMC 8 Transition Thread (was Sat. AMC-8)
Replies: 149
Views: 7951

Re: Offical AMC 8 Transition Thread (was Sat. AMC-8)

We have a 1984 vintage Comtech, so decided to buy a new dish. Got a 12' DH dish in March, been sitting in the garage while we got around to building the pole. Wednesday four of us tried to haul the mounting ring (not the dish--which is made of four aluminum petals--but just the iron mounting ring)....
by grich
Wed May 24, 2017 4:28 pm
Forum: FM Radio
Topic: Satellite Metrics
Replies: 4
Views: 336

Re: Satellite Metrics

We are pulling from Galaxy 4. NPR... You mean what's now G16 at 99 west? It's busy too, and you have busy C-band satellites on either side of you. Could be some intermittent splatter. Anyway, if EbNo is staying above 10, I wouldn't be too concerned, assuming you've checked your feedhorn for any dev...
by grich
Wed May 24, 2017 9:29 am
Forum: FM Radio
Topic: Satellite Metrics
Replies: 4
Views: 336

Re: Satellite Metrics

If you are moved to AMC18, that's something you'll expect to see, due to all the additional traffic on AMC18 and the adjacent birds compared to the nearly dead environment around AMC8.
by grich
Mon Mar 27, 2017 12:36 pm
Forum: Ask the Engineers
Topic: TFT 3320 CAP converter
Replies: 5
Views: 385

Re: TFT 3320 CAP converter

Call or email Darryl Parker (408) 219-5579 darryleparker(AT)comcast.net. He's still attempting to support TFT stuff in a limited capacity. Thanks, Chuck...Darryl sent me the basics of setup, which I forwarded to the guy at the station. Turns out he had the geocodes (US, state, local area) in the ev...
by grich
Mon Mar 20, 2017 9:55 am
Forum: Ask the Engineers
Topic: TFT 3320 CAP converter
Replies: 5
Views: 385

TFT 3320 CAP converter

I know someone with a 3320 CAP converter. He says the unit appears to be polling the FEMA site just fine, but the processed alert log shows it hasn't actually processed a message since 2015! I didn't ask him how he passed the last National EAS test. :shock: Of course, he's not getting any CAP tests....
by grich
Thu Mar 09, 2017 5:19 pm
Forum: FM Radio
Topic: STL dropouts....back today
Replies: 23
Views: 1485

Re: STL dropouts....back today

Happens with our TV STL a few times a year, and at about the same times you list. The only thing you could do is get a second antenna in the spot the ducting forces the signal to. The telco folks have designed space-diversity into many of their MW systems for years...a second dish is mounted a speci...
by grich
Tue Mar 07, 2017 1:58 pm
Forum: FM Radio
Topic: High Pitched Tone in FM Audio?
Replies: 23
Views: 1503

Re: High Pitched Tone in FM Audio?

I have also ran into the rotten jumper issue on the HT10. In my case, the IPA was erratic. The outer jacket of the RG213 had cracked off and the exposed braid was shorting to the IPA regulator heatsink. The only thing handy was a short piece of RG8 with N connectors left over from a Marti antenna in...
by grich
Thu Mar 02, 2017 3:40 pm
Forum: FM Radio
Topic: High Pitched Tone in FM Audio?
Replies: 23
Views: 1503

Re: High Pitched Tone in FM Audio?

davek wrote:
Thu Mar 02, 2017 3:38 pm
Here you go :)

FM-535-WCF.pdf
FM-580-WCF.pdf
You beat me to it! :D