Question for Rich
About 12 years ago I helped install a Harris 2.5KW (I think) AM transmitter for use on 1350. I remember PWM. Can you recall what Class of operation it was/is? The output was solid state.Regards,...
View ArticleClik here to view.
60 dbuv from a 1 watt transmitter and unity gain antenna 3 meters above earth
AttachmentSize60db.jpg187.52 KBForums: Transmitter Talk
View ArticleRoll Your Own
By far the friendliest and most generous Part 15 Rule is this one§ 15.23 Home-built devices. (a) Equipment authorization is not required for devices that are not marketed, are not constructed from a...
View ArticleIAM Outdoor transmitter hum help?
Hey everyoneI recently bought the I AM Outdoor unit. The new one with the white box and the junction box. It came with 75 feet of cat 5 cable. When I got it home I turned it on inside just to make...
View ArticleWX issues
I'd like some experienced opinions on protecting e.g. a newly constructed AMT 5000 and it's connections, mounted outdoors at the bottom of a custom antenna system, from storms and condensation. What...
View ArticleQRPp Wattmeter Can Measure as low as 5 milliwatts
I know it's normalized for 50 ohms but.....Also 300 KHZ to 54 MHZhttp://www.ohr.com/wattmeter.htmForums: Transmitter Talk
View ArticleTesting Transmitters Today
Today - I am going to test my Procaster, Hamilton AM1000, and Talking House. My goal is to compare apples to apples to apples. I want to hear the best signal I can from these fcc certified...
View ArticleDefine Ground Lead
I'm somewhat intriqued by the topic of "long ground leads" and I know it's been tossed about here like crazy. But from a legal FCC standpoint, what exacgtly defines a "ground lead".Clearly, in an...
View ArticleA Little Range Measuring
So, now that IRC has been on the air for 10 months, and I pretty well know where it reaches, using my car radio, a small portable transistor set, and a boom box, and I've taken actual calibrated field...
View ArticleClik here to view.
Tim's Coverage Area
AttachmentSizeBovey.jpg285.23 KBBased on Tim in Bovey's 7100 feet, this is what I came up with. Very impressive, especially being able to cover an entire town. Not knowing his actual location I threw...
View ArticleModulation Monitor
I again find myself being temped by this unit:http://www.radioassociates.com/Although I have access to a Belar mod monitor, it's not exactly frequency agile and I'd need the matching RF amp, etc to...
View ArticleNew here, so figured I say hey!
Howdy, been a low power bradcaster for going on 2 years on july 3rd. I run "free radio for the free thinker" 92.9 in Haddon Heights, NJ. Awesome to find a forum dedicated to this form of radio. Can't...
View ArticleLPB RC-6A Carrrier Current Vacuum Tube Transmitter Problems
I'm putting this post up, but I mightnot get back to a computer for a few days.This transmitter has quite a history - it wasworking great a few months ago. I love carriercurrent - it is so...
View ArticleGround in C. Crane FM Transmitter-2
Is the RF ground in the C. Crane FM Transmitter-2 separate/filtered from the power or audio grounds?I have a C. Crane FM Transmitter-2. I want to put it in a weather proof box up high outside. It would...
View ArticleModulation Monitor Ordered for Testing
OK troops, I'm about to embark on my own product test. I have ordered the AMM-SD1 Series AM Modulation Monitor from http://www.radioassociates.com/ . I will be prepared to test it compared to a...
View ArticleBeyond the Fringe
During the night something got knocked to the floor in the dark by a clumsy radio announcer, but I was too sleepy to find out what had fallen until this morning.Oh no! The precious TECSUN PL-310 had...
View ArticleIs carrier current possible under part 15?
Is carrier current AM possible under part 15?I've seen posts about using hardware to do it, but never any mention of enforcement.Forums: Transmitter Talk
View ArticlePart 15.219 AM Stereo Transmitters
AspiSys sells their ASMAX series which I may have to buy if someone else doesn't offer an alternative. I currently use Radio Systems' I.AM.Radio transmitter and ATU. I like both of them and will...
View ArticleHUM eating me up
Radio Scientists:I have a question that some of you may have some experience with. I have a short horizontal antenna in my attic which I have loaded with a variable loading coil.This antenna is feed by...
View Article