Yes, that's a complicated matter. The name and the function can get very confused if you don't know what you are doing. Any transformer can change the voltage from the primary to the secondary and th
Tim The issue with the relay at the antenna is the time to close the contacts and avoid RF hot switch. I'm using a Jennings RJ1A-26S for years, just 4-6 milliseconds to close. Or you can use a sequen
Bob Here the missing part of my original post to motivate you to try a single twisted pair. See bellow Ilian's comments about the performance of the RX antenna. Illian was not detuning his TX antenna
That's just pure propagation, 160m duct is the most common mode for most DX. 3B9 was peaking 599 in Texas and 589 in KP2. The signal was just not getting down here in South Florida due Es clouds. The
Here is the K7AGE posts video of WLW's 1932 500,000 Watt AM transmitter http://forums.qrz.com/showthread.php?398944-K7AGE-posts-video-of-WLW-s-1932- 500-000-Watt-AM-transmitter Enjoy it Regards JC N4
Bruce I lost several resistors on my WF until I started to use NTE 3 W Metal on the vertical Waller Flag and on the Horizontal WF I am using an array of 9 parallel/series. http://www.nteinc.com/resis
Hi guys I'm in Ft Lauderdale EL96ub and the carrier on 3501.6 is s9+10 coming around 350 degree with some QSB. Regards JC N4IS Hi Guys, K5ESW reported the following : The 3501.5 carrier is audible in
I just checked 3501.6 and I have no copy or trace during daytime. I'm confirming the 350 degree direction from Ft Lauderdale JC 73's N4IS _________________ Topband Reflector
Tom, Mike is right, the issue with audio overload is complex for most of new radios, most of them have A/D just at the MIC input, if the A/D overloads the RF chain is compromised. These radios have n
Hi James There are several solutions for a separated receive port. However let me comment on some details, 1- Small Delta loop. To be a receiver antenna the antenna gain need to be less than 20 db, w
Hi Bjorn How much I can improve by moving the coil up. What improvement should I expect if center loading at about 7 meter? How about moving the coil all the way up to the top loading spokes? Is it w
Hi Carl and top-band lovers I would like to mention Chapter 7.6 as well, polarization matching, and also 7.7 Fading. I started developing my HWF early 2009 and I think there is no more to squeeze fro
Tom The way I see it is if the rate is not 0.546 uS or so, you do not have circular polarization.You have a slowly rotating wave, and the sense of the RX antenna would be meaningless unless you could
James You brought a good article about HF propagation, however the behavor on 160m is different from HF. If you check on the KL7A arcticle figure 1 what is happening between 1 and 2 MHz you can see t
Hi Jim The antenna geometry indicates that it should perform similar to a Waller Flag *under the same conditions*. << The perform under same conditions is expected, however the WF RDF is between 11.5
I'm sure it will play well in terms of keeping your transmitter happy but the relatively large bandwidth you are measuring is indicative of substantial loss in the system somewhere. This would be a
This antenna was evaluated before and published in QEX May June 2005 Just google >> Broadcast CFA antenna 73's N4IS --Original Message-- From: Topband [mailto:topband-bounces@contesting.com] On Behal
I owned a FT2100Z for several years and the power on 160m was the same as other bands. I don't expect any design flaw. The original tubes are not available anymore, the 572's tubes manufactures nowad
Hi Guys I would say vertical "IN" the salt water. George AA7JV is my mentor about antennas, and his 160m vertical is at the pear, just 2 m from the salt water, the ground plane is a flat sheet SS met
If it was really 10-20 dB, shore locations would stand out like a sore thumb compared to inland locations. Everyone from around New England is about the same. Heck, K3LR is on the Ohio/PA border and