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 on: Yesterday at 07:53:59 PM 
Started by W5TWP - Last post by KE4XJ
I have an 80 meter horizontal loop with the closest approach to the power line less than 100 feet. The noise doesn't "sound" like powerline noise. I have already tracked down a broken insulator near me and the power company fixed it with a dramatic decrease in the noise. That noise was characteristic and the present noise noise not sound like that, but I could be wrong in not blaming the powerline for my background noise. Serendipitously, the loop is fed about 1/4 wavelength from the nearest point of approach to the powerline. I use the loop on all bands 80 through 10 meters and the noise is pretty constant from band to band. I am in the process of two antenna projects: installation of a Pixel receiving loop and a Heights tilt over crank up tower for, initially, a Hexbeam antenna. I will know more by December or January. I would be very interested in someone else's experience. The background noise level now is much greater than it was in 1980, 36 years ago!


 on: Yesterday at 07:31:20 PM 
Started by ONAIR - Last post by ONAIR
They are really going at it tonight on 3840!!

 on: Yesterday at 07:20:10 PM 
Started by VA2FSQ - Last post by VA2FSQ
4 days and no answers to my emails.

Sure I could phone one store, but which one? Isn't the whole idea of an online store to order online? I order everything on line....electronics "computer hardware radio equipment.  I thought I'd give them a chance....
They have 1800 numbers that do not work from Canada. 
As to shipping  I ended up ordering from dxengineerung. FedEx ground $18 which includes Canadian taxes for a TR switch
Don't get ripped off on us shipping. It's a scan. I can get many things very cheap. You just have to press the issue with the online companies. They are just lazy.
See, us Canadians do know a thing or to...we have have 4 strikes against us but we get a good laugh at the biggest strike against the I have to tell you who?

 on: Yesterday at 07:04:57 PM 
Started by W3LDR - Last post by W1XWX
Right now the best deal in SDR radios IMO-- is the Flex 3000 or 5000 bought used directly from Flex radio. These have been checked and calibrated by Flex and come with 90 day warranty. Run the revised software by KE9NS-- and you have a REALLY fantastic SDR for about $1000. See the Flex radio site for these certified radios.

 on: Yesterday at 06:58:25 PM 
Started by KE7EOZ - Last post by KE7EOZ
DX Engineering Maxi-CoreĀ® High-Power Transmission Line Transformers and Baluns DXE-BAL050-H05-A Is this the model you are talking about?

 on: Yesterday at 06:25:27 PM 
Started by N0PQK - Last post by KE2N
Reply to an old posting. 

We just got our DR-1X and found some de-sensing issues at the higher power levels.  After some testing I found (on 440) that there was -68 dBm of transmit carrier coming OUT of the receiver port.  This increased to -64 dBm at high power.  Apparently, somewhere around this power level is where the receiver will start to de-sense (close the squelch on weak signals as soon as the transmitter keys up).  The problem can be aggravated by poor isolation at the duplexer but most of it is due to bad isolation INSIDE the DR-1X.

In digital mode there is no squelch, of course, but weak signals get all squirrely when the transmitter keys up.

We have been investigating adding some UHF ferrite cores internally and it looks like a 10 dB improvement is possible.

Ken KE2N

 on: Yesterday at 06:19:32 PM 
Started by W4BOW - Last post by KI4DSC
The bottom line is this. You have to do the best with what you have to work with. In a perfect world you would elevate the whole mess and have a great antenna system, but like me, you have to conform to the rules of your HOA.

This is the real deal.  You need to put in as many radials as you can, and make them as long as you can. My Hustler trapped vertical works great with 10 radials of 60 feet each on the east side of the antenna. I then have 12 radials that are about 40 feet each on the north side of the antenna and on the west side I have another 10 that range from 30 feet to as short as 10 feet. I have no radials on the south side because of a lake.

I ran each radial until I got to the property line or ran into an obstacle like the house or the patio. I bent several radials 30 to 45 degrees to fit more radials in the space.

Is it perfect? I'm sure it is not, but it works well and it out performs having no antenna at all!!!

 on: Yesterday at 06:19:10 PM 
Started by ONAIR - Last post by PLANKEYE
Taking a written test based upon some technical knowledge or the ability to memorize morse code does not make someone in to a decent human being.

No matter the level of training, what test you passed.. or didn't or dit's and dah's is not what makes you a good amateur radio operator.

Demonstrating some maturity and discretion, knowing when it is better to not associate with lowlifes or to get dragged in to their nonsense. Hopefully you were raised as a decent human being with some respect for others, for yourself. Someone who believes that their personal honor and character mean something.

On 3840, on eHam and in ten thousand other representative slices of society, there are plenty of examples of people to admire and those to despise.

Choose with whom you associate very carefully, they are also a reflection of your own judgement and character.

This is just a hobby relax. 

Taking a written test based upon technical knowledge and the ability to memorize things can be important.

It starts with small tasks when we are very young in school.

Maturity and discretion come in time from experience and lots of schooling.

We are not Medical Doctors.

This is just a hobby relax.   



 on: Yesterday at 06:07:44 PM 
Started by KI4DSC - Last post by WB6BYU
Depends - how far are you trying to work on 40m and 80m?

The dipole will probably be better for local nets, while the vertical likely will
have an edge for DX (depending on your local ground conductivity.)

The best case would be to have both and to switch between them to see
which works best for each contact.  (Sometimes it might change of the
space of a few minutes.)

 on: Yesterday at 06:05:28 PM 
Started by KF7DS - Last post by WB6BYU
The original "Army Loop" used sectional aluminum pieces to make it more portable.  (I think
5' each, for a total perimeter of 40'.)  They had to use gold plated joints to keep the
contact resistance down.

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