Search found 148 matches

by Jim Sofonia
Sun Jul 26, 2020 3:59 pm
Forum: AM Radio
Topic: New engineer - questions
Replies: 18
Views: 737

Re: New engineer - questions

NECRAT wrote: Sun Jul 26, 2020 7:45 am Fits in an area of 1/3 acre and has a signal that covers at least twice that!
Reminds me of fiberglass rod somebody in Canada was selling that wouldn't broadcast much past it's own shadow, oh but it too was FCC approved.
by Jim Sofonia
Mon Jun 22, 2020 3:03 pm
Forum: FM Radio
Topic: Exciter shopping
Replies: 15
Views: 1710

Re: Exciter shopping

We put in a few "BEXT" exciters to replace some troubeled exciters. They were a nice price and have worked well for several years now. The STL transmitters are good too, but the receivers won't pass digital. But overall good equiptment, made in Italy I think.
by Jim Sofonia
Mon Jun 01, 2020 3:17 pm
Forum: FM Radio
Topic: Harris FM 20 K pro and con views
Replies: 21
Views: 1467

Re: Harris FM 20 K pro and con views

The transmitter is fine, probably last a long time. The cavity design has been proven to work and was carried over into the HT line of transmitters. Trouble is if you do have a problem Gates Air has limited support for the older transmitters. You might get help on a good day if they are not to busy....
by Jim Sofonia
Tue May 19, 2020 8:51 am
Forum: FM Radio
Topic: Parting out Harris 3.5K
Replies: 13
Views: 1078

Re: Parting out Harris 3.5K

kcbooboo wrote: Sun May 17, 2020 4:05 am When you touch the panel, the transparent aluminum becomes clear and you can see the screen inside it.
Bob M.
Transparent aluminum! "Admiral, there be whales here!
by Jim Sofonia
Thu Apr 23, 2020 6:34 am
Forum: FM Radio
Topic: Harris THE-1 stereo Pilot issue
Replies: 8
Views: 498

Re: Harris THE-1 stereo Pilot issue

Ummn.. What is a "David" ?
by Jim Sofonia
Mon Apr 06, 2020 5:09 pm
Forum: Everything else
Topic: Replace Car Radio Antenna?
Replies: 4
Views: 734

Replace Car Radio Antenna?

I just bought a 2008 Dodge Nitro, great car and looks.I like it a lot. It came with a Am/Fm/DVD radio and has satellite radio too. The antenna is a puny rubber duck mounted on the rear of the roof. Seems to work ok but could it be better if I install a 30" whip on the fender? I don't use the satelli...
by Jim Sofonia
Thu Feb 20, 2020 9:35 am
Forum: Everything else
Topic: Looking for video of the 9-11 attack engineers P.O.V.
Replies: 0
Views: 574

Looking for video of the 9-11 attack engineers P.O.V.

I was at the NAB convention the following year. They presented a video from the broadcast engineers point of view that was quite good. Does anyone know how to see that video again? I've searched but not finding it as there are so many 9-11 clips out there.
by Jim Sofonia
Sun Dec 29, 2019 3:28 pm
Forum: AM Radio
Topic: AM Digital NPRM
Replies: 54
Views: 3270

Re: AM Digital NPRM

I think this is going to follow the same path as the old AM Stereo stuff. Grumpy old Fossil True, I agree. Even the cars that do have AM are a chore to find the "AM band" switch. I've worked a lot with AM directionals and I reluctantly say today they are not worth all the work it takes to keep them...
by Jim Sofonia
Sat Dec 28, 2019 2:07 pm
Forum: AM Radio
Topic: AM Digital NPRM
Replies: 54
Views: 3270

Re: AM Digital NPRM

What happened to the FCC ruling a while back that all radios had to have AM capabilities simular to TVs had to get UHF?
by Jim Sofonia
Wed Dec 04, 2019 6:28 am
Forum: TV Engineering
Topic: UHF Batwing recieve antenna
Replies: 4
Views: 438

Re: UHF Batwing recieve antenna

COMMENG wrote: Tue Dec 03, 2019 8:39 pm You might try this:

COMMENG
It looks like what I had in mind. Do you have a link to additional info and the freq. it covers?
by Jim Sofonia
Tue Dec 03, 2019 3:45 pm
Forum: TV Engineering
Topic: UHF Batwing recieve antenna
Replies: 4
Views: 438

UHF Batwing recieve antenna

I have UHF stations to the East, and others (mostly repeater stations) to the West. I'm thinking about building a batwing antenna that would be optimized for 470-608. Any ideas on this project? I would think the bi-directional would serve my location well. Where could I get plans for this?
by Jim Sofonia
Fri Nov 02, 2018 1:48 pm
Forum: AM Radio
Topic: RF Ammeter resistance
Replies: 15
Views: 1094

Re: RF Ammeter resistance

I would recommend using a Delta TCT transformer and meter. No loss to your rf chain and more accurate.
by Jim Sofonia
Thu Aug 23, 2018 11:18 am
Forum: AM Radio
Topic: RCA BTA 250 M
Replies: 2
Views: 538

Re: RCA BTA 250 M

Check with Ed Trombley, Engineer - Ext 105 ET@Munn-Reese.com 517.278.7339 He has a lot of that stuff in his garage.
by Jim Sofonia
Mon Aug 13, 2018 3:57 pm
Forum: Everything else
Topic: WWV WWVH
Replies: 16
Views: 1503

Re: WWV WWVH

Antiquated technology now very obsolete. I used to use the service 60 years ago as a short wave listener but that is long gone. The signal is lousy in many parts of the country. The last try at using the service was the WWV "atomic" clocks that Brookstone used to sell 20 years ago, and they never wo...
by Jim Sofonia
Wed Jul 25, 2018 11:27 am
Forum: Everything else
Topic: WKRP
Replies: 16
Views: 1275

Re: WKRP

Thanks Mark, you're a good man. Is the tower still there?