Search found 209 matches
- Sat Dec 09, 2017 5:47 pm
- Forum: From the Trenches
- Topic: The high leg
- Replies: 14
- Views: 3223
Re: The high leg
Thanks for reminding me about the tapped delta "stinger" configuration.... that certainly will get ya...if you aren't careful...
- Fri Dec 08, 2017 11:15 am
- Forum: From the Trenches
- Topic: The high leg
- Replies: 14
- Views: 3223
Re: The high leg
Three-Phase Delta, with a High Leg, is called Open Delta and it is always troublesome. It may cost you several thousand to convert it to Closed Delta *(with all three phases operating at the same voltage) but it is well worth it if you want to keep your transmitter happy. If you have an older rig......
- Mon Aug 14, 2017 11:43 am
- Forum: AM Radio
- Topic: DX-10 Controller Probs
- Replies: 9
- Views: 1168
DX-10 Controller Probs
Hi All... I've got an old DX-10 transmitter from the later 1980's that has been sitting around collecting dust and rodent excrement. The unit has been cleaned up and was working for a while. However, now it isn't....The unit has a 2 step-start but at the moment it's only doing a 1 step. It tries to ...
- Sun Jul 16, 2017 12:35 pm
- Forum: AM Radio
- Topic: Antennas for Field Measurement
- Replies: 7
- Views: 1259
Re: Antennas for Field Measurement
Frank, AM signal Measurements are done with a Field Strength Meter designed for that type of measurement. Potomac Instruments makes that type of meter, and it is considered the standard test equipment for that use. AM signal measurements are rarely made from a car with an antenna stuck on it.... The...
- Fri Apr 07, 2017 4:13 pm
- Forum: AM Radio
- Topic: MW10B-A little help?
- Replies: 16
- Views: 2145
Re: MW10B-A little help?
I've worked on MW-5 in the past and ran across similar symptoms when a some resistors in the DC supply opened up. IIRC these were power resistors that were located near the front of the rig and were inside on the swing open door. It's been many years since, so I may be imagining things :roll: Good L...
- Wed Mar 01, 2017 8:21 am
- Forum: FCC Discussion
- Topic: FCC AM Database
- Replies: 8
- Views: 1361
Re: FCC AM Database
Hi Deep,
Thanks for the insight....and examples. You certainly are a Deep Wealth of knowledge.
Wish me Luck !
Dybas
Thanks for the insight....and examples. You certainly are a Deep Wealth of knowledge.
Wish me Luck !
Dybas
- Mon Feb 27, 2017 6:29 pm
- Forum: FCC Discussion
- Topic: FCC AM Database
- Replies: 8
- Views: 1361
Re: FCC AM Database
Hi Deep Thought, I'm no IT wizard...but I do know a few things. One thing I can't figure out is... how does each of the data files determine what row of data it links to in another file ? For example : The am_ant_sys file contains about about 82,000 records of data but there are no Call Letters in t...
- Mon Feb 27, 2017 8:37 am
- Forum: FCC Discussion
- Topic: FCC AM Database
- Replies: 8
- Views: 1361
FCC AM Database
Has anyone created an "offline" database from the FCC CDBS records ? I'm looking for a way to create my own. My objective is to be able to search for AM stations within the 3Km distance from a specific bearing. The FCC database has been off line every now and then and it's caused me a bit of a probl...
- Thu Oct 27, 2016 3:34 pm
- Forum: AM Radio
- Topic: Combining two AMs at one site
- Replies: 24
- Views: 2774
Re: Combining two AMs at one site
What you want to do is called "Diplexing" and it's done regularly. The first thing to consider is the frequencies of the two stations involved. If they are closer than 100 Khz apart in frequency, there could be problems keep one stations signal out of the others transmitter. But if you have enough s...
- Tue Oct 18, 2016 8:17 pm
- Forum: AM Radio
- Topic: FREQ CHANGE BE AM-1A IN THE FIELD
- Replies: 13
- Views: 1790
Re: FREQ CHANGE BE AM-1A IN THE FIELD
Deep Thought is correct when he states that the Class E RF stage requires factory tuning. Class E doesn't tune like an old tube or other solid state stage. You can destroy the RF FET's real quickly when the RF stage isn't properly tuned. Send it to the factory and be done with it....
- Sat Aug 13, 2016 4:49 pm
- Forum: TV Engineering
- Topic: Harris Platinum -Scrapping
- Replies: 3
- Views: 1171
Harris Platinum -Scrapping
Anyone need parts from a Harris Platinum on TV CH-52 ? lots of output modules available.
- Mon Jul 04, 2016 5:27 pm
- Forum: AM Radio
- Topic: Harris MW10B RF driver module
- Replies: 3
- Views: 1017
Re: Harris MW10B RF driver module
The IRF 350 is available in Plastic & TO-5 ....ya just gotta do a little hunting.
- Mon Mar 28, 2016 8:08 am
- Forum: From the Trenches
- Topic: OK here's one for ya...
- Replies: 22
- Views: 2479
Re: OK here's one for ya...
Glad to see someone is taking care of WCGO... The 3 phase in that local does get goofy every once and a while. But usually all you need to do is power down the Nautel for 3 minutes and she comes right back up... There is a Power Clamp surge protector out there ...maybe it's time to replace it ?
- Mon Feb 08, 2016 12:45 pm
- Forum: FM Radio
- Topic: Translator Filings
- Replies: 4
- Views: 913
Translator Filings
Is there a simple and easy way to get a list of the FM Translator filings ? Is there a separate FCC database for these ?
Any thoughts ?
Any thoughts ?
- Fri Dec 11, 2015 9:36 am
- Forum: AM Radio
- Topic: Power limits
- Replies: 7
- Views: 1411
Re: Power limits
The difference between 5.4Kw and 5.9Kw isn't discernible to the average person, especially with the existing noise levels. I'd play it safe and operate at 5.4Kw and not worry that an FCC inspection would result in the station being fined and lose more money than it would ever gain. Those who try to ...