Search found 3147 matches

by Deep Thought
Thu Aug 17, 2017 10:16 am
Forum: AM Radio
Topic: AM project
Replies: 3
Views: 183

Re: AM project

Dale H. Cook wrote:
Thu Aug 17, 2017 8:56 am
petertohen wrote:
Wed Aug 16, 2017 11:14 pm
... but here are a few links to MW Loops antenna projects of interest
Only the first link is working for me.
All of those links are a mess.
by Deep Thought
Sun Aug 06, 2017 7:26 pm
Forum: AM Radio
Topic: Dead Harris - X1000B Suggestion
Replies: 7
Views: 313

Re: Armstrong 500 watt AM output network board

Difficult as in you can't repair them. I strongly suggest you look elsewhere.
by Deep Thought
Thu Aug 03, 2017 8:38 pm
Forum: FM Radio
Topic: 6 KW Transmitter Ballpark price
Replies: 16
Views: 853

Re: 6 KW Transmitter Ballpark price

It basically comes down to a choice between toilet paper roll transmitters and ones you can fix and keep running instead of throwing them away and tearing off a new one when the old one dies. In the long run you'll spend more on the throwaway option. Gates Air was running a ridiculous sale earlier, ...
by Deep Thought
Wed Aug 02, 2017 8:23 am
Forum: FM Radio
Topic: EAS Antenna Issue
Replies: 13
Views: 701

Re: EAS Antenna Issue

First...yes you can complain about the translator, but why start a fight? You "start a fight" because the translator licensee is responsible for clearing this up. That means they are on the hook for the expenses necessary to return the affected station to its pre-translator scenario. Having said th...
by Deep Thought
Tue Aug 01, 2017 3:16 pm
Forum: FM Radio
Topic: EAS Antenna Issue
Replies: 13
Views: 701

Re: EAS Antenna Issue

Call the originating station and/or translator licensee and file a complaint that the translator is blocking reception of the "regularly received signal" of the class-A station. No I am not kidding. This is their problem, not yours.
by Deep Thought
Sat Jul 29, 2017 1:01 pm
Forum: AM Radio
Topic: AM Major Modifications window..
Replies: 3
Views: 329

Re: AM Major Modifications window..

Basically only two things are major mods anymore: Frequency change more than 3 channels and site move to where the old and new facilities are not mutually exclusive. That move to 1180 would have been a major mod requiring an auction filing window but as an existing class-D it could have retained tha...
by Deep Thought
Sat Jul 29, 2017 10:14 am
Forum: AM Radio
Topic: AM Major Modifications window..
Replies: 3
Views: 329

Re: AM Major Modifications window..

There really haven't been that many go dark, and since you'd have to 100% meet the current allocation rules they don't provide much of an opportunity for new stations anyway (which is basically what a "moved" station is). The FCC still hasn't finished processing all of the applications filed during ...
by Deep Thought
Fri Jul 28, 2017 10:55 am
Forum: DXing
Topic: E-skip 7/27
Replies: 9
Views: 473

Re: E-skip 7/27

Had a client checking out a potential translator channel yesterday who reported back that there was strong, unacceptable interference on it even though the channel is "wide open" at that location. Turned out to be a station from >250 KM distant. Fun times.
by Deep Thought
Mon Jul 24, 2017 9:18 am
Forum: Everything else
Topic: You need this
Replies: 22
Views: 916

Re: You need this

Shane wrote:
Mon Jul 24, 2017 12:03 am
IIRC, the freq response improved!
You probably RC. One of those on each end converting from 600 ohms to 150 and back was an "old" trick to get better freq. response out of a dry pair. 8)
by Deep Thought
Tue Jul 18, 2017 9:44 pm
Forum: Everything else
Topic: You need this
Replies: 22
Views: 916

Re: You need this

Bill DeFelice wrote:
Tue Jul 18, 2017 7:08 pm
Just like the guys who use the monster thick speaker cable who forget just how small the pc traces are between the amplifier's output and the speaker terminals.
There is some legitimate physics behind the large gauge speaker cable...if you have 500 foot runs. :lol:
by Deep Thought
Wed Jul 12, 2017 11:56 am
Forum: FM Radio
Topic: Any opinion on MACHLETT transmitter tubes.
Replies: 6
Views: 326

Re: Any opinion on MACHLETT transmitter tubes.

Pretty sure Varian bought them around 1990.
by Deep Thought
Mon Jul 10, 2017 10:58 pm
Forum: Everything else
Topic: Harris MSP 100
Replies: 2
Views: 159

Re: Harris MSP 100

It was Harris' attempt at the then-state of the audio multiband processing art and they charged accordingly, around $5,600 back when you could still buy a new car for that. I know of a couple AM stations that ran them and they sounded OK, but never were able to compete with Optimods. It is a bit of ...
by Deep Thought
Mon Jul 10, 2017 10:23 pm
Forum: AM Radio
Topic: Daytime Impedance high?
Replies: 26
Views: 1565

Re: Daytime Impedance high?

That is a very non-critical part of the circuit, forming a power divider based on roller position on the coil and the ratio between the "top" and "bottom" parts. You may notice a small difference in phase (<5°) due to the slightly different coil value and it'll probably shift the common point tuning...
by Deep Thought
Thu Jul 06, 2017 1:57 pm
Forum: FM Radio
Topic: Static Dissipators?
Replies: 13
Views: 738

Re: Static Dissipators?

In my Southern Illinois youth we observed a lightning bolt ignoring at least a half dozen 30-foot TV antenna towers, three different power lines, a couple dozen tall-ish (30-40 foot) trees within about 250 feet of the gas line under a ditch full of water it had some sort of vendetta against. Up from...