Cooking | MFJ Cub 40m QRP CW Transceiver circuit walk throug

Cooking (0.25 seconds)

Get email alerts with latest cooking tips via email
(You can cancel email alerts at anytime.)

MFJ Cub 40m QRP CW Transceiver circuit walk through and review, plus bandsweep, ham radio MFJ 9340

From - Posted: Feb 17, 2013 - 7,846 views
Cooking | MFJ Cub 40m QRP CW Transceiver circuit walk through and review, plus bandsweep, ham radio MFJ 9340 | MFJ Cub 40m QRP CW Transceiver circuit walk through and review, plus bandsweep, ham radio MFJ 9340
MFJ Cub 40m QRP CW Transceiver circuit walk through and review, plus bandsweep, ham radio MFJ 9340
MFJ Cub 40m QRP CW Transceiver circuit walk through and review, plus bandsweep, ham radio MFJ 9340
Duration: 16 minute 36 seconds 
Play Cooking Video
I assembled this MFJ-9340 Cub QRP CW transceiver for 40m for my friend Gerry - N2GJ. It's a very pleasant kit to build. All surface mount components are already mounted on the board. Assembly involves soldering the through hole components, and winding two toroidal coils. For me, the assembly took one evening, and the alignment took another evening. The video goes through the block diagram of the transceiver, then walks through the schematic, describing the function of each circuit. The transceiver tunes from about 7005kHz to about 7.070kHz. At the end of the video, I sweep through the band, listening to the various CW signals that can be heard on the 18" antenna I have connected in the basement. Pretty sensitive for a simple receiver.
speed up the downloads
Like to get lastest cooking tips everyday!

Building the MFJ Cub Part 1

Construction Series on Building the MFJ Cub QRP CW Radio
1,251 views | Nov 22, 2013

Amateur Radio Elecraft KX3 QRP with LNR Precision Par Endfedz on Mt Be...

Join VK4FADI and VK4FSCC for an afternoon on Mt Beerburrum, Sunshine Coast using an Elecraft KX3 with an EFT EndFed 102040m antenna on a squid pole. Propagation was not great but we made a few fun contacts. The Par Endfedz Trail Friendly antenna from LNR Precision worked a treat with 1.0:1 SWR on 7.090MHz, the SOTA frequency for 40m. This was a trial run for when Summits on the Air gets going in Queensland. Mt Beerburrum will be a SOTA summit worth 1 point. It is a relatively easy summit with a 20 minute steep hike up a concrete path to the summit. The entrance is easy to find from the main street of Beerburrum, about an hour north of Brisbane.Take water and insect repellent and sunscreen. The views on a clear day are great. The walk is 700m in distance, climbing about 260m as you go. There was a steady stream of visitors doing the climb on the day we climbed and a fire warden was working in the fire tower at the summit. There are no facilities at the summit.
3,557 views | Aug 04, 2013

Hamfest radio Friedrichshafen 2012 1ere partie BROCANTE

Ici vidéo de la brocante du ham radio 2012 de Friedrichshafen. Une fois encore un beau salon, bien fourni en brocante ou matériel neuf. Ici c'est la vidéo de la BROCANTE, la vidéo matériel neuf est dans la 2eme vidéo.
11,369 views | Jun 29, 2012

Cheap and simple TDR using an oscilloscope and 74AC14 Schmitt Trigger ...

This video is a follow on from my previous video that discussed how to measure the length and impedance of coax using an oscilloscope and an pulse generator. This previous video goes into more of the theory and the different measurements you can make. It can be found here: http:youtu.beIl_eju4D_TM However, this video showed the use of a pulse or function generator as the signal source. The problem is that most inexpensive generators won't have a fast enough risetime to be able to resolve shorter cables or finer precision in the measured length. This video shows a very inexpensive circuit that you can build that has a very fast risingfalling edge speed, making it easy to more precisely measure the cables. It is based on a 74AC14 Schmitt Trigger Inverter chip and a handful of passive components. One of the six inverters is used as an oscillator which drives the remaining 5 inverters in parallel to drive the coax under test.More detail regarding the Schmitt Trigger circuit can be found in the video uploaded immediately prior to this video: http:youtu.beNuXitMK3HSAThis video is shot in HD
20,787 views | Apr 21, 2013

How to zero beat WWV to check or adjust a Frequency Counter s accuracy

This video shows how to zero-beat the WWV signal as a tool to adjust the frequency reference of an old frequency counter. It demonstrates the concept of zero-beat'ing a test signal against the WWV carrier. Since the WWV carrier is likely more accurate than any other frequency reference that most hobbiests and hams have in their labs, this is a useful technique. It can be used to check or adjust the 10MHz reference in the counter, if it has one, or can be used to very precisely set the output frequency of a signal generator which can then be used as a test signal for the frequency counter.Similar techniques can be used to adjust the frequency accuracy of a ham radio's reference. Several years ago, I wrote up a procedure that I put on my website. If can be found here: http:www.qsl.netw2aewadjustrig.htm
9,216 views | Aug 05, 2012

MFJ 9420 20 Meter SSB QRP Transceiver Introduction and overview AF5DN

Quick introduction to the MFJ-9420 20 Meter SS QRP Transceiver.Please visit my Amazon A store for some great Radio Products. Please visit my web page @
14,556 views | Sep 09, 2012

Ten Tec R4020 and Emtec EM2 QRP CW Demo

A brief review of the Ten Tec R4020 and the Emtec EM2 ATU. Together they make a fantastic QRP rig.
14,428 views | Dec 11, 2011

6 Meters The Magic Band

Six Meters (50-54 MHz) is also known as "The Magic Band" by HAMS who enjoy the magic of HF-type long range communication on VHF during the summer Sporadic-E opening. The trick is you never know when there will be an opening so you have to be ready for the action when the band conditions open! VHFDX INFO Randy - K7AGE K7AGE QRZ Page http:www.qrz.comcallsignk7age Get On Six (6-Meter Intro) by K7AGE 6-Meter Dipole by K7AGE Get On Six - Contesting by K7AGE
74,962 views | Jun 20, 2011

K1OIK presents CW for the beginning ham

20,384 views | Oct 03, 2012

Drake TR 4Cw Ham Radio Transceiver Capacitor Upgrade

I decided to upgrade some of the old electrolytic capacitors in my Drake TR-4Cw radio that I purchased new in early 1977 just before I got my novice class ham ticket. This radio is build like a tank and now it should last another 36 years!
4,818 views | Jan 21, 2013

Ham Radio Expedition Mountain topping w FT817 Buddistick

A video log of our adventure hiking on Mt Herman. My goats Rooster & Peanut dance on the rocks while the 'old goat' works 20m SSB. FT-817 and Buddistick made it all the way to Fairbanks! Not bad for the bottom of the solar cycle.
91,232 views | Apr 21, 2008

Simple Station Monitor for Ham Radio using an Oscilloscope

This short video shows a very simple way to hook up an oscilloscope to use it as an RF Signal Monitor to observe the RF envelope from your ham radio transmitter. It shows how you can use the stray RF coupling that exists between the RF path inside of your tuner to one of the unused ports in the tuner as a simple no-cost RF sampler to couple the signal into your oscilloscope. BE ABSOLUTELY SURE that you do NOT transmit directly into your oscilloscope - that is a sure way to DAMAGE your scope!
13,214 views | Dec 28, 2012

SGC 2020 hf transceiver QRP radio collectable Floyd Virginia LCF Group

The SGC 2020 hf transceiver Reprint from SGC company Information: The SG-2020 covers all HF frequencies from 1.8 to 30 Mhz. It is factory-set for 20 watts PEP with front panel power adjustments down to 1W using USB or LSB. There are 20 factory pre-programmed memories preset to frequencies within each of the nine amateur bands for fast band accessibility. Each memory position can be selected for a specific transmitter output power, specific amount of bandwidth filtering, mode and split VFO. The memory channels can be re-programmed to accommodate alternate frequencies of your choice within the frequency range and a simple unlock procedure allows you to choose any HF frequency worldwide.All Reasons. All Seasons. This is the transceiver for base, backpack or business trips - the ultimate portable trasceiver. There are no confusing menus and just two-step operation: select your frequency and transmit. The SG-2020 is compact and weighs only 4.5 pounds. Operate SSB or CW from wherever you are. The radio comes standard with SGCs superior ADSP² noise canceling technology, so you can copy signals loud and clear. The SG-2020 ADSP² is pure, simple HF at its best. The above reprinted from the SGC company information. This video was produced by the LCF Group, ( We are on The Crooked Road Heritage Music Trail and the Round The Mountain Artisan and Craftsman Venue as a great place to visit ) Floyd Professional Center, Village Green, Floyd Virginia. The LCF Group consist of David Larsen KK4WW, Gaynell Larsen KK4WWW and Dee Wallace KG4VMI. We are all radio amateurs and also are Directors of The Foundation for Amateur International Radio Service ( FAIRS) also located in Floyd Virginai. N4USA is the radio call for FAIRS and we have operated in Dominica as J79WW J79WWW J79VMI and many other countries. We are members of The Floyd Amateur Radio Society FARS. The LCF Group (1-540-745-2322) ham radio morse code cw amateurradio hamradio transceiver radio receiver linear amplifier linear amp heathkit ten-tec cw http:www.virginiamountainland.Com and http:www.microcomputerhistorymuseum... and in Floyd Virginia. compass magazine blue ridge Parkway Destination Center ,David Larsen Blacksburg, David Larsen Blacksburg Group, Blacksburg Group, , , , Bugbook , , , , , , , bugbook series Bill St Pierre Floyd Virginia video
34,009 views | May 04, 2009

Building the MFJ Cub QRP Part 4 The Cub Lives!

Thanks to Bill (WX4AR) for a suggestion that brought the saga to an end. He suggested that the Cub may have been mislabeled. That suggestion led me to using the Frequency counter one more time and I discovered the Cub was transmitting at 16.900 (way out range). A few simple adjustments and within a few minutes the Cub came alive on 20 meters. Lesson learned...don''t overlook the obvious.
1,271 views | Dec 13, 2013

Portable Antenna DX LOOP QRP BAG by IK5XCT

Antenna DXLOOP, antenna Magnetica LOOP diametro esterno 1,2metri in cavo flessibile CELLFLEX con diametro del conduttore 12,3mm.I materiali realizzativi permettono un ottimo rendimento per il portatile QRP dai 40M ai 15M con le seguenti efficienze rapportate al dipolo posto a mezz'onda dal suolo:40M ... 15,1% 30M ... 39% 20M ... 66% 17M ... 82% 15M ... 89% Nel mio Zaino QRP è possibile trovare la DXLOOP contenuta in una Bag realizzata e cucita appositamente per questa antenna, Yaesu FT817 - DXKEY easy per le chiamate automatiche QRP Tasto Minipalm - MIcrofono Yaesu MH31 - Batteria al LiPo da 5A Tripod della SIRUI T-1005X L'idea iniziale fu quella di realizzare un'antenna tipo la ALEXLOOP ma con performance maggiori, infatti in questo mio modello il diametro è di 1,2m invece che di 1m ed il conduttore è di cellflex (12,3mm diam) inceve che RG213 (calza 7,35mm diam), questo mi ha permesso ad esempio di triplicare l'efficienza in 40m etc.... maggiori info su http:www.qsl.netik5xct73 de Stefano IK5XCT QTH: Cascine di Buti (PISA)
4,152 views | Nov 04, 2012

Oscilloscope Basics, and how they can be used in the hamshack tutorial

This is a recording of a presentation given at the Ocean Monmouth Amateur Radio Club (OMARC) on 12 July 2014. (audio isn't perfect, but it is certainly understandable). It covers the basics of oscilloscopes - including a tutorial on the vertical, horizontal and trigger controls, and the basics of probes, and also talks about a few ways that scopes can be used for amateur radio purposes in the hamshack. OMARC's website:
4,988 views | Jul 12, 2014

Disclaimer: Cooking-Library.Com is a Food and Cooking search engine that indexing and organizing articles on the web. Everyday 100+ new guides, tips, experiences to improve your cooking skills.

© 2014 - Cooking-Library.Com