Try http://amfone.net. Lots of good, knowledgeable people there, and some
are on 160.
___
UR RST IS ... ... ..9 QSB QSB - hw? BK
In thinking about the measurement of EIRP for the new band it occurred to me
that this might be the time for a few folks to think about how we could
fabricate a commonly calibrated field strength meter. Such a device might
well be used on both 160m and the 600 kHz band. By commonly calibrated
You can get an absolute calibration by the reciprocity
method, using two identical antennas. An extension of
this technique is the 3 antenna method which gets rid
of the assumption that the antennas are identical, by
doing 3 pairs of measurements.
In the reciprocity method, you transmit on one
On Mon, 2012-02-20 at 19:04 -0700, Tod - ID wrote:
In thinking about the measurement of EIRP for the new band it occurred to me
that this might be the time for a few folks to think about how we could
fabricate a commonly calibrated field strength meter. Such a device might
well be used on
On 2/21/2012 8:26 AM, Joe Subich, W4TV wrote:
On Mon, 2012-02-20 at 19:04 -0700, Tod - ID wrote:
The important thing is to have a way to assure that when someone
measured the same field at the same point with the same type of
measurement device they would get the same
The link provided below shows how to calculate EIRP. I think each
administration will spell out the requirements of how to legally
calculate EIRP. To me it is fairly straight forward. 60M in the US is an
example. While there is an EIRP limitation, the FCC simplified the
determination by
The Potomac Analog FIM is no longer available, nor are the parts to
repair them and calibration service is no longer available. The new
meters are expensive digital units. But in broadcast we do not use them
to determine power but rather coverage usually when directional systems
are tuned.
On
Joe, et. al
I am quite certain that there will need to be different sense antennas for
160m and 630m. I would not be surprised if we did not also need bandpass
filters for each of the bands as well.
As I recall there were several circuits in QST using a single analog
Devices unit to measure RF
As I posted earlier field measurement is not an accurate method of
determining power. I seriously doubt an administration permit such a
technique unless it was very dumbed down and produced very 'safe'
results or in other words less power than could otherwise be achieved.
On 2/21/12 2:54 PM, Tod
If you can find a used FIM 22 it goes from 200 KHz to 550 KHz. That said
I can not see determining EIRP by field measurement. There are just two
many variables and a degree of engineering skill not posessed by the
average amateur. The various national authorities must have a means of
If it is true that the skywave is stronger than the ground wave, then
the power would need to be backed off,
Fortunately, it is not true with short ground mounted monopole
antennas. In order for the skywave to exceed the groundwave, the
monopole needs to be longer than half wave (somewhere in
On Tue, Feb 21, 2012 at 7:58 PM, ZR z...@jeremy.mv.com wrote:
I recently talked to Ken Gordon, W7EKB, who owns 600...@w7ekb.com, the
600M experimental group forum about opening it up to hams
Do you have a link to the forum, Carl? It doesn't appear to be on w7ekb.com.
73, Mike
www.w0btu.com
Here is a chance to see, if not hear, signals on 600 meters.
http://w5jgv.com/Spectrum/index.htm
There are a lot of guys who participated in the experimental effort -
check out
http://www.500kc.com/USA_600_M_Station_ID.htm
- - - probably some of those guys we have worked on TopBand.
Guess
Thanks. That must be it. http://www.500kc.com/Maillists.htm
On Tue, Feb 21, 2012 at 9:59 PM, Tod Olson t...@k0to.us wrote:
http://www.500kc.com/
___
UR RST IS ... ... ..9 QSB QSB - hw? BK
14 matches
Mail list logo
