50MHz transmitting Band-Pass filters

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Dual

24 Mar 2016 24 Mar '16

9:08 p.m.

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Dual

3 Apr 3 Apr

4:02 a.m.

New subject: 50-54MHz transmitting Band-Pass filters

Dual

19 Jun 19 Jun

4:25 a.m.

New subject: 144 - 148MHz Transmitting Band-Pass filters

Dual

26 Jun 26 Jun

7:41 p.m.

New subject: Band-Pass filters with preamplifiers PGA-103+ and SPF-5122Z

Dual

28 Jun 28 Jun

6:48 p.m.

New subject: 432 MHz Low loss band pass filter

Dual

7 Jul 7 Jul

6:14 p.m.

New subject: 432 MHz Low loss band pass filter RX - TX

Dual

11 Aug 11 Aug

5:10 p.m.

New subject: 144-148 MHz Low loss band pass filter for transceivers (LNA)

Dual

12 Sep 12 Sep

3:41 p.m.

New subject: New DualBand 144 and 432 EME antenna

Dual

7 Oct 7 Oct

5:09 p.m.

New subject: New 13cm antenna

Dual

28 Oct 28 Oct

7:45 p.m.

New subject: 70MHz band pass filter

Dual

22 Jan 22 Jan

3:14 p.m.

New subject: Couple of new dual band nice antennas 144 - 432

Dual

11 Feb 11 Feb

5:09 p.m.

New subject: New dual band antenna and Low band DX HF VHF wideband preamplifier

Joe Taylor

6:40 p.m.

New subject: New dual band antenna and Low band DX HF VHF wideband preamplifier

Hi Goran, On 2/11/2017 5:09 PM, Dual wrote:

...

Most beautiful 6m long antenna PA144-432-38-6 with common connector. http://www.antennas-amplifiers.com/2m-70cm-High-gain-Yagi/DualBand-2m-70cm-… Optimization took more than 30 days.

Interesting design. Why the 100/50 W power limit?? -- Joe, K1JT

Dual

12 Feb 12 Feb

4:12 a.m.

New subject: New dual band antenna and Low band DX HF VHF wideband preamplifier

F1TE

4:37 a.m.

New subject: New dual band antenna and Low band DX HF VHF wideband preamplifier

Hello Antenna indeed very interesting, but what dual-band solution for coupling 2 or 4 antennas with common connector ? 73, Lucien F1TE From: Dual Sent: Sunday, February 12, 2017 10:12 AM To: Joe Taylor ; moon-net(a)mailman.pe1itr.com Subject: Re: [Moon-Net] New dual band antenna and Low band DX HF VHF wideband preamplifier Hi Joe Antenna itself does not have power limit. No problem to put 1500 W. But balun have. It is hardly achievable wideband 500 Ohms common mode impedance. From 140 to 440 MHz. Although on this balun attainable. Goran YU1CF http://www.antennas-amplifiers.com http://www.dual.rs On 12.02.2017 00:40, Joe Taylor wrote: Hi Goran, On 2/11/2017 5:09 PM, Dual wrote: Most beautiful 6m long antenna PA144-432-38-6 with common connector. http://www.antennas-amplifiers.com/2m-70cm-High-gain-Yagi/DualBand-2m-70cm-… Optimization took more than 30 days. Interesting design. Why the 100/50 W power limit?? -- Joe, K1JT -------------------------------------------------------------------------------- _______________________________________________ Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html

John PA5MS

5:45 a.m.

New subject: New dual band antenna and Low band DX HF VHF wideband preamplifier

Lucien, A ¼ wave on 2m is ¾ wave on 70cm so any ¼ or ½ wave splitter on 2m will work on 70cm too.. Phasing lines will be long, so higher loss, and stacking distance will be huge on 70cm though.. 73! John PA5MS Van: moon-net-bounces(a)mailman.pe1itr.com [mailto:moon-net-bounces@mailman.pe1itr.com] Namens F1TE Verzonden: zondag 12 februari 2017 10:38 Aan: moon-net(a)mailman.pe1itr.com Onderwerp: Re: [Moon-Net] New dual band antenna and Low band DX HF VHF wideband preamplifier Hello Antenna indeed very interesting, but what dual-band solution for coupling 2 or 4 antennas with common connector ? 73, Lucien F1TE From: Dual Sent: Sunday, February 12, 2017 10:12 AM To: Joe Taylor ; moon-net(a)mailman.pe1itr.com Subject: Re: [Moon-Net] New dual band antenna and Low band DX HF VHF wideband preamplifier Hi Joe Antenna itself does not have power limit. No problem to put 1500 W. But balun have. It is hardly achievable wideband 500 Ohms common mode impedance. From 140 to 440 MHz. Although on this balun attainable. Goran YU1CF http://www.antennas-amplifiers.com http://www.dual.rs On 12.02.2017 00:40, Joe Taylor wrote: Hi Goran, On 2/11/2017 5:09 PM, Dual wrote: Most beautiful 6m long antenna PA144-432-38-6 with common connector. http://www.antennas-amplifiers.com/2m-70cm-High-gain-Yagi/DualBand-2m-70cm-A ntenna-PA144-432-38-6 Optimization took more than 30 days. Interesting design. Why the 100/50 W power limit?? -- Joe, K1JT _____ _______________________________________________ Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html

Leif Asbrink

10:08 p.m.

New subject: New dual band antenna and Low band DX HF VHF wideband preamplifier

Hi John and Lucien, Overstacking does not degrade gain, it just makes the main lobe narrower than necessary and also brings up strong sidelobes. The sidelobes will be close to the main lobe so they are harmless on EME most of the time. Sometimes they might be advantageous since the (deep) minimum between the main lobe and a side lobe can be used to suppress something unwanted. Conventional stacking on 144 MHz means stacking for a nice pattern with a gain typically 0.5 dB below maximum. For the same boom length on 432, maximum gain is at about 75% of this stacking distance. (maximum gain is with a sidelobe level of about -8 dB) so sidelobes will not be much below the main lobe. BUT there will not be any loss of gain or G/T!!! Just a requirement for more frecise moon tracking. For terrestrial work it might be a good idea to understack on 144 MHz to get a better pattern on 432, but one has to be very careful. Understacking will cause antennas to couple to eachother and make the frequency response different. The point of maximum gain would move downwards in frequency. All of this can be simulated with good accuracy today. I think wery good systems with dual band antennas are possible. Maybe, some day, also as X-pol systems:-) 73 Leif

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Dual

7:43 a.m.

New subject: New dual band antenna and Low band DX HF VHF wideband preamplifier

Dual

12 Mar 12 Mar

5 p.m.

New subject: 3 New dual band antennas

Dual

19 Mar 19 Mar

7:08 p.m.

New subject: EME3 2m High Selectivity, High Q, Low Loss Band-Pass Filter with PGA-103+ Low Noise Preamplifier 1500W T/R Relay

Dual

29 Apr 29 Apr

7:40 a.m.

New subject: EME3 6m High Q, Low Loss Band-Pass Filter with PGA-103+ 1500W T/R Relay

Dual

6 May 6 May

12:04 p.m.

New subject: 70cm Low pass filter 1500W

Dual

28 May 28 May

7:32 p.m.

New subject: New low priced 4m antennas

Dual

11 Jul 11 Jul

7:55 p.m.

New subject: New dual band 4m and 6m antenna and cheap 4m filter

Dual

20 Jul 20 Jul

2:03 p.m.

New subject: AIS Marine Automatic Identification System antenna - preamplifier

Dual

31 Oct 31 Oct

6:56 p.m.

New subject: High power 70cm BandPass filters

Dual

9 Nov 9 Nov

4:41 p.m.

New subject: 4kW 70cm Notch and Low Pass Filter

Dual

7 Mar 7 Mar

5:13 p.m.

New subject: Needed distances for Economical Stack of Four 23cm antennas and two dual band Yagis in regard of big rotator

Vladimir

8 Mar 8 Mar

2:40 p.m.

New subject: Needed distances for Economical Stack of Four 23cm antennas and two dual band Yagis in regard of big rotator

Hello Goran, Q: Does the Ant G/T term refer to a receive antenna or a transmit/receive antenna? Will your antenna be equally successful in receive mode and transmit mode? https://www.antennas-amplifiers.com/2m-world-best-gt-low-noise-yagi-antenna… Vladimir. --- Исходное сообщение --- От кого: "Dual via Moon-net" <moon-net(a)mailman.pe1itr.com> Дата: 8 марта 2020, 00:22:55 I have been asked to calculate needed distances to stack four 23cm antennas and two dual band antennas in regard of big G-5500 rotator and metal pipes. Story is here: https://www.antennas-amplifiers.com/23cm-yagi-stack-with-dualband-2m-70cm And new super low noise 2m Yagi antenna here: https://www.antennas-amplifiers.com/2m-world-best-gt-low-noise-yagi-antenna… Goran YU1CF https://www.antennas-amplifiers.com http://www.dual.rs https://www.facebook.com/AntennasAmplifiers/ On 25.03.2016 02:08, Dual wrote: Couple of colleagues asked for transmitting Band-pass filters. 4kW http://www.antennas-amplifiers.com/Band-Pass-Filter/6m-4kW-Bandpass-Filter-… 1.5kW http://www.antennas-amplifiers.com/Band-Pass-Filter/50MHz-1k5-Bandpass-Filt… 300W http://www.antennas-amplifiers.com/Band-Pass-Filter/6m-300W-Bandpass-Filter… 73 Goran YU1CF -- https://www.antennas-amplifiers.com http://www.dual.rs _______________________________________________ Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html

Dual

23 Mar 23 Mar

9:32 a.m.

New subject: Couple of new EME2 and EME3 BPFs with relays 1500W

Dual

8 Nov 8 Nov

3:14 p.m.

New subject: New nice 23cm antenna

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Dual
F1TE
Joe Taylor
John PA5MS
Leif Asbrink
Vladimir