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MARTIN - G8JNJ - Active antennas



Current status: normal - monitoring
Number of users monitoring this page: 0
Most recent sizable change (text, html) : 2017-09-24 16:51
Most recent change (text, html) : 2017-09-24 16:51
Last checked for changes: 2017-12-17 16:51
ChangeDetection started monitoring: 2014-06-20 16:51
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summary of most recent changes

Showing 1 - 5 of 22 1 2 3 4 [next]

View changes:  2017-09-24 16:51    70 new words, 32 deleted words, 1% change   
... The reason Mini-Circuits doesn?t specify an operating ... now 10KHz. By omitting the ferrite beads and adding an additional HF ... GHz. In the original circuit (shown above) I used BAT81 ... response too dramatically. However when used in this configuration they can seriously degrade ... series connected, reverse biased diodes is shown below. By omitting the ferrite beads and adding an additional HF ... The reason Mini-Circuits doesn?t specify an operating ... now 10KHz. By omitting the ferrite beads and adding an additional HF ... GHz. In the original circuit (shown above) I used BAT81 ... response too dramatically. However when used in this configuration they can seriously degrade ... series connected, reverse biased diodes is shown below. Here's a screen grab The reason Mini-Circuits doesnt specify an operating ... response too dramatically. By omitting the ferrite beads and adding an additional HF ... can also be raised to somewhere around 1GHz. Here's a screen grab    more...

View changes:  2017-08-19 16:51    129 new words, 5 deleted words, 2% change   
... to be done. Owen Note that it's not a good idea to add ... 3 to be = +28.8dBm O wen Duffy has performed a ... MHz. The measured IPIMD performance was OIP2 = +59.1dBm and OIP3 seems to be = +43.8dBm which is about 1012dB better than PA ... slightly larger whip antenna , which will provide improved S/N performance without introducing significant a significantly higher level of intermodulation products. Here ... to be done. Note that it's not a good idea to add ... 3 to be = +28.8dBm O wen Duffy has performed a ... MHz. The measured IMD performance was OIP2 = +59.1dBm and OIP3 ... to be = +43.8dBm which is about 12dB better than PA ... slightly larger whip antenna , which will provide improved S/N performance without introducing a significantly higher level of intermodulation products. Here to be done. Owen Duffy has performed a ... MHz. The measured IP3 seems to be ... about 10dB better than PA ... without introducing significant intermodulation products. Here    more...

View changes:  2017-07-23 16:51    337 new words, 0 deleted words, 5% change   
... and Parts list. Broadband Amplifiers Two of the best designs I've found are shown below. Norton Amplifiers use a transformer to provide lossless negative feedback which linearises the amplifier and improves the intermodulation ... than the previous Norton amplifier, and I found that it was a lot easier to construct. This is my current preferred design for use as a distribution amplifier. All content is made ... and Parts list. Broadband Amplifiers Two of the best designs I've found are shown below. Norton Amplifiers use a transformer to provide lossless negative feedback which linearises the amplifier and improves the intermodulation ... than the previous Norton amplifier, and I found that it was a lot easier to construct. This is my current preferred design for use as a distribution amplifier. All content is made ... and Parts list. ... All content is made    more...

View changes:  2017-06-26 16:51    51 new words, 0 deleted words, <1% change   
... measure this properly. W0QE Active Monopole Preamplifier W0QE has a lot of interesting information on his website, including an amplifier that is suited for use as an active monopole. http://www.w0qe.com/Projects/active_monopole_amplifier.html Nordholt Antenna A p measure this properly. W0QE Active Monopole Preamplifier W0QE has a lot of interesting information on his website, including an amplifier that is suited for use as an active monopole. http://www.w0qe.com/Projects/active_monopole_amplifier.html Nordholt Antenna A p measure this properly. ... Nordholt Antenna A p   

View changes:  2017-06-01 02:31    156 new words, 0 deleted words, 2% change   
... active-antenna.eu/ Here's my crossed loop array using the LZ1AQ kit. The loops are 1m in diameter and made from LDF4-50 semi rigid coax. The basic loop amplifier circuit ... build, here's my first version built on a ... ratio output transformers. And this is the current version I'm using. I omitted the Input filter, 10 ... diameter and is 0.3m wide. It has an inductance of approxiamtely 1.6uH. ... active-antenna.eu/ Here's my crossed loop array using the LZ1AQ kit. The loops are 1m in diameter and made from LDF4-50 semi rigid coax. The basic loop amplifier circuit ... build, here's my first version built on a ... ratio output transformers. And this is the current version I'm using. I omitted the Input filter, 10 ... diameter and is 0.3m wide. It has an inductance of approxiamtely 1.6uH. There is a wealth ... active-antenna.eu/ ... There is a wealth    more...


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