qrp-projects.blogspot.com

Amateur Radio QRP Projects

Amateur Radio QRP Projects. Thursday, 10 July 2014. Build a RF Dummy Load. A RF dummy load is quite useful when working on transmitters. It allows you to test and adjust the transmitter without an antenna, eliminating interference to other radios on your test frequency. It also presents your transmitter with a proper 50 Ω load so as to not cause any damage to its final RF amplifier stage. Next holes are drilled and tapped for the flanged termination unit. The flanged termination unit also gets a thin...

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Amateur Radio QRP Projects. Thursday, 10 July 2014. Build a RF Dummy Load. A RF dummy load is quite useful when working on transmitters. It allows you to test and adjust the transmitter without an antenna, eliminating interference to other radios on your test frequency. It also presents your transmitter with a proper 50 Ω load so as to not cause any damage to its final RF amplifier stage. Next holes are drilled and tapped for the flanged termination unit. The flanged termination unit also gets a thin...

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Amateur Radio QRP Projects. Thursday, 10 July 2014. Build a RF Dummy Load. A RF dummy load is quite useful when working on transmitters. It allows you to test and adjust the transmitter without an antenna, eliminating interference to other radios on your test frequency. It also presents your transmitter with a proper 50 Ω load so as to not cause any damage to its final RF amplifier stage. Next holes are drilled and tapped for the flanged termination unit. The flanged termination unit also gets a thin...

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qrp-projects.blogspot.com

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Amateur Radio QRP Projects: July 2014

http://qrp-projects.blogspot.com/2014_07_01_archive.html

Amateur Radio QRP Projects. Thursday, 10 July 2014. Build a RF Dummy Load. A RF dummy load is quite useful when working on transmitters. It allows you to test and adjust the transmitter without an antenna, eliminating interference to other radios on your test frequency. It also presents your transmitter with a proper 50 Ω load so as to not cause any damage to its final RF amplifier stage. Next holes are drilled and tapped for the flanged termination unit. The flanged termination unit also gets a thin...

2

Amateur Radio QRP Projects: Low-pass filters

http://qrp-projects.blogspot.com/2014/07/low-pass-filters.html

Amateur Radio QRP Projects. Sunday, 6 July 2014. Station WRNY is equipped with the latest device known to the world of radio engineering, called a harmonic suppressor, the effect of which is the elimination of the signals of WRNY from every frequency except that to which it has been assigned by the Government, which means, in fan language, that the station may be tuned in on only one setting of the dial." Radio News magazine, August 1925. In the range of C1 C2 L1. 5500-7300 kHz 820 820 2.2. 736 12.9 ...

3

Amateur Radio QRP Projects: 25W RF amplifier by BLY88

http://qrp-projects.blogspot.com/2011/03/25w-rf-amplifier-by-bly88.html

Amateur Radio QRP Projects. Friday, 18 March 2011. 25W RF amplifier by BLY88. RF amplifier with 25W of power for 88-108MHz FM transmitters. Subscribe to: Post Comments (Atom). The 80/40 Meter Direct Conversion Receiver. 160; The circuit diagram shown in Figure illustrates the schematic for the 80/40 Meter Direct Conversion Receiver. A dipole or suitable anten. 10-M DSB QRP TRANSMITTER WITH VFO. VFO with Ceramic Resonator. 40 Meter Homebrew QRP Transmitter. 160; QRP TRANSMITTER - Michigan Mighty Mite!

4

Amateur Radio QRP Projects: Simple Modulators for Solid-State Transmitters

http://qrp-projects.blogspot.com/2014/07/simple-modulators-for-solid-state.html

Amateur Radio QRP Projects. Sunday, 6 July 2014. Simple Modulators for Solid-State Transmitters. Simple AM modulators work by varying the amount of power flowing through the transistor which is serving as the RF output amplifier. By imposing an audio waveform on the power supply, amplitude modulation is achieved. Rather than giving detailed examples, this page gives simplified schematics, followed by links to circuits that actually use the various techniques. This is the system used in Charles Wenzel's c...

5

Amateur Radio QRP Projects: Build a RF Dummy Load

http://qrp-projects.blogspot.com/2014/07/build-rf-dummy-load.html

Amateur Radio QRP Projects. Thursday, 10 July 2014. Build a RF Dummy Load. A RF dummy load is quite useful when working on transmitters. It allows you to test and adjust the transmitter without an antenna, eliminating interference to other radios on your test frequency. It also presents your transmitter with a proper 50 Ω load so as to not cause any damage to its final RF amplifier stage. Next holes are drilled and tapped for the flanged termination unit. The flanged termination unit also gets a thin...

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ham-antennas.blogspot.com

Ham Antenna Blog: May 2014

http://ham-antennas.blogspot.com/2014_05_01_archive.html

Collections of Ham Radio antenna projects from web. Saturday, May 31, 2014. Historical Events in Amateur Radio. 1894-1899- Marconi conducts his wireless experiments in Europe and sends a message across the English Channel. 1901-Marconi sends a wireless signal across the Atlantic. 1900-1908- Thousands experiment with wireless. Few at this time are interested in it as a hobby only. 1904-J.A. Fleming develops the 2 element (Diode) vacuum tube. 1914-1917- The number of amateur radio stations increases. T...

ham-antennas.blogspot.com

Ham Antenna Blog: Make a magnetic loop antenna for 7-21 mhz

http://ham-antennas.blogspot.com/2014/07/make-magnetic-loop-antenna-for-7-21-mhz.html

Collections of Ham Radio antenna projects from web. Sunday, July 6, 2014. Make a magnetic loop antenna for 7-21 mhz. This antenna has several advantages, not least being only 1 metre diameter! So what are its disadvantages? Magnetic loop dimension details. Diameter of loop 1000mm. Diameter of tube 15mm. Width of base 780mm. Diameter of support pipe 42mm. Loop end spacing (for tuner) 50mm. Height of support 1590mm. Gamma match width 310mm. Clean the tube with wire wool before any soldering. Use inverted s...

ham-antennas.blogspot.com

Ham Antenna Blog: July 2014

http://ham-antennas.blogspot.com/2014_07_01_archive.html

Collections of Ham Radio antenna projects from web. Sunday, July 6, 2014. Small loop antennas (magnetic loops). Built well, these small antennas perform really well. Built well, only the bandwidth suffers as a result of miniaturisation. 80m loop [3 x 1.5 x 0.8m], using 15mm copper tube. Top right (and detail):. 80 and 40m loop [1.8m x 1m x 0.8m], using 1m wide 1mm thick aluminium sheet. 160 and 80m loop [octagonal with 1.5m sides]. Using 28mm copper tube. And 272 ohms at 3.7MHz. 244/5 = 48.8A. From these...

ham-antennas.blogspot.com

Ham Antenna Blog: WA1ION version of the K9AY loop

http://ham-antennas.blogspot.com/2011/02/wa1ion-version-of-k9ay-loop.html

Collections of Ham Radio antenna projects from web. Tuesday, February 15, 2011. WA1ION version of the K9AY loop. By Mark Connelly, WA1ION. The K9AY loop antenna. Can provide a cardioid (heart-shaped, single-null) pattern when one end of the antenna is connected to ground through a variable DC resistance. This occurs because of the interaction between electric and magnetic field pick-up patterns. Above are of a K9AY loop tested at sites in Billerica, MA and East Harwich, MA during 1999. Small loop antenna...

ham-antennas.blogspot.com

Ham Antenna Blog: A Shortened Inverted L for 160 Metres

http://ham-antennas.blogspot.com/2014/07/a-shortened-inverted-l-for-160-metres.html

Collections of Ham Radio antenna projects from web. Wednesday, July 2, 2014. A Shortened Inverted L for 160 Metres. Despite the dreadful noise on top band caused by modern electronic gadgets and the difficulty in accommodating a necessarily large aerial in a small garden, I was keen to try to get on to top band. I experimented with some different ideas during 2009, some of which are shown on this. Shortened Base Loaded Top Band Antenna For Small Gardens. September 23, 2015 at 10:44 PM. G7FEK Limited Spac...

ham-antennas.blogspot.com

Ham Antenna Blog: Six-element 2-meter Yagi beam antenna

http://ham-antennas.blogspot.com/2011/02/six-element-2-meter-yagi-beam-antenna.html

Collections of Ham Radio antenna projects from web. Friday, February 18, 2011. Six-element 2-meter Yagi beam antenna. The antenna is fed with coaxial cable at the center of the driven element. Ordinarily, either a matching section of coax, or a gamma match, will be needed because the effect of parasitic elements on the driven element feedpoint impedanceis to reduce it. Subscribe to: Post Comments (Atom). Six-element 2-meter Yagi beam antenna. Antenna Tuning Unit (ATU) For 27-MHz CB Radios. HOW TO MAKE YO...

radio-receivers.blogspot.com

Radio receivers: Links

http://radio-receivers.blogspot.com/p/links.html

Collected from the internet. I'm listing here some of the websites I found useful or they are containing quality materials about radio receivers and electronics in general. Ham Radio related links. Crystal radios - Dave Schmarder. Simple home-built radios - Rick Andersen KE3IJ. Alan Yates' laboratory - VK2ZAY. Pass Band Filters - Miguel Angelo Bartié. Richard McWhorter's Youtube channel. Ray C Ring W4KIA. PA0FRI's Technical information for Hams. Amateur Radio QRP Projects. QRP HomeBuilder - QRPHB.

ham-antennas.blogspot.com

Ham Antenna Blog: April 2014

http://ham-antennas.blogspot.com/2014_04_01_archive.html

Collections of Ham Radio antenna projects from web. Friday, April 11, 2014. Car antenna for the 144-146 MHz. Subscribe to: Posts (Atom). Six-element 2-meter Yagi beam antenna. Figure 18-8 shows the construction details for a six-element 2-meter Yagi beam antenna. This antenna is built using a 2 X 2-in wooden boom. Antenna Tuning Unit (ATU) For 27-MHz CB Radios. 160; This antenna tuning unit (ATU) enables half-wavelength or longer wire antennas to be matched to the 50-? Antenna input of 27-MHz Citize.

ham-antennas.blogspot.com

Ham Antenna Blog: VHF/UHF Dualband vertical antenna

http://ham-antennas.blogspot.com/2011/03/vhfuhf-dualband-vertical-antenna.html

Collections of Ham Radio antenna projects from web. Tuesday, March 8, 2011. VHF/UHF Dualband vertical antenna. Subscribe to: Post Comments (Atom). Six-element 2-meter Yagi beam antenna. Figure 18-8 shows the construction details for a six-element 2-meter Yagi beam antenna. This antenna is built using a 2 X 2-in wooden boom. Antenna Tuning Unit (ATU) For 27-MHz CB Radios. 160; This antenna tuning unit (ATU) enables half-wavelength or longer wire antennas to be matched to the 50-? 160; A very simple and ef...

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Train Your Dog To Be Well-Behaved With These Tips. When people primary take home their new dog, they cannot realize the significance of kennel training. For those who understand the best way to crate train your dog, you will end up manage to forestall trouble behaviors as time goes on. The next few paragraphs contains numerous helpful tips on cage training your brand-new pup that may maintain mom and her dog pleased for years to come. In advance of crating your puppy usually allow them to be able to get ...

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QRP HomeBuilder - QRPHB

QRP HomeBuilder - QRPHB. Scratch Homebrew Component-Level Radio Electronics. Saturday, 4 July 2015. Motley Tales of Woe and Rapture. Notes on a few experiments for my Jupiter receiver. I departed from my 5 normal month radio hiatus to blog because it’s super-hot outdoors and our basement feels oh so cool. Sometimes, too:. If I wait too long to post stuff, I lose passion or worse yet — forget details and/or lose data. I love the works of Anton Chekhov. This post arose because I wanted to design my own Jup...

qrp-projects.blogspot.com

Amateur Radio QRP Projects

Amateur Radio QRP Projects. Thursday, 10 July 2014. Build a RF Dummy Load. A RF dummy load is quite useful when working on transmitters. It allows you to test and adjust the transmitter without an antenna, eliminating interference to other radios on your test frequency. It also presents your transmitter with a proper 50 Ω load so as to not cause any damage to its final RF amplifier stage. Next holes are drilled and tapped for the flanged termination unit. The flanged termination unit also gets a thin...

qrp-qtc.de

QRP-QTC | QRPeters Mitteilungen aus der QRP und Selbstbau Welt

QRPeters Mitteilungen aus der QRP und Selbstbau Welt. Zum sekundären Inhalt wechseln. Interessant für KX3 Besitzer. Es gibt eine Lösung zur Beseitigung der Störgeräusche, die bei der Abstimmung des VFO au auf den höheren Bändern zu hören sind. Die offizielle Anleitung von Elecraft ins Deutsche übertragen findet man im KX3-Blog. QRP-Geräte, Bausätze, Zubehöre. HF-Messungen für den Funkamateur, neue Ausgabe erschienen. HAM Radio 2013 – Grillparty des Team Funken Lernen und der DL-QRP-AG. Wer an sich für un...

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QRP-Shop - HAM Radio International

Tigertronics SignaLink Digimode Modem. Ihr Warenkorb ist leer. Herzlich Willkommen bei DL2FI- QRPeter und DL7NIK - Nikolai . Vom 07.08.2015 bis 28.08.2015 haben wir Betriebsferien. PX3 Panorama Adapter für den KX3 jetzt kurzfristig (1-2 Wochen) lieferbar! KX3-2M internes 2m all mode Modul zum KX3 jetzt kurzfristig (1-2 Wochen) lieferbar! Die Versandkosten innerhalb Deutschland betragen pauschal 5,00 Euro, innerhalb der EG 8,00 Euro und außerhalb der EG 12,00 Euro. DNAT Bad Bentheim.29.08.2015.

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看客中国人的春运一票难求的回家路. 说回一般情况，政知局整理了1月下旬新当选的各位省长的名单，包括转正的代理省长们 . [详情]. 英最高法判决难改脱欧大方向但硬脱欧将受掣肘. 张校长说，华坪女子高中是一所全免费的学校，硬件设施由政府承担，学生学杂费、生活费则大多来自像一滴水这样的好心人士捐赠。当得知一滴水是位84岁的婆婆时，张桂梅非常感动，很感谢这位老人。原标题代理省长批量转正 . [详情]. 黑龙江黑河边防战士零下20 赤膊雪浴. 朴槿惠: 亲信门是用谎言堆起来的大山. 男子私发50万涉恐悬赏寻子:孩子丢了家不成家. 版权所有 Power by www.qrp.695y4f239.11deen.cn.