Field Day Report

Always look for a field day report from this guy on Youtube, this is a video of his field day station this year:

Neophyte Receiver

Working on this receiver:

Neophyte Two Chip Direct Conversion Receiver – VE3OT Version

The original Neophyte Receiver was published in OST, February 1988, and used the new Signetics Si602 oscillator-mixer chip to directly convert radio frequency signals to DSB audio and the National Semiconductor LM386 audio amplifier chip to provide sufficient signal gain to drive headphones or even a small speaker. This receiver uses an improved mixer chip, NE612, which is a direct substitution.

Mitch Powell, VE3OT, modified the Neophyte using parts on hand so that his Fanshawe students could build a simple receiver, gaining circuit building skills while being exposed to the hobby of Ham Radio.

Two 10.7MHz IF transformers are used as an RF pre-selector, tuned down into the 40m ham band by placing about 100pF of capacitance across the main coil winding. A third IF transformer is used as the Local Oscillator coil, suitably tuned by additional capacitance and a variable capacitance diode, or Varicap, biased by a DC voltage from the 10kW tuning potentiometer. Mitch used two common power rectifier diodes, 1N4005, in parallel as a varicap. Audio from the NE612 is bandwidth limited by a simple C-R-C low pass filter, fed into the 50kW volume control, and then applied to the inverting input of the LM386N audio amplifier. The original Neophyte design used both outputs of the mixer and both inputs of the audio amplifier for improved dynamic range and lower noise, but lacked a volume control.

Component Side Printed Circuit Board View with component layout.

Note that a 0.1uF cap has been added to the LM386 power pin (6) for improved stability. The Tuning Potentiometer can be a 50K linear for slightly reduced power draw.

Dave, VE3EI

Link to original document.

CQ WW 2016 SSB Contest

2016 CQ WW SSB Contest

We moved in 2013 and I had not set up any kind of station at the new place since. Before the 2016 CQ WW SSB Contest, I decided to try to make some contacts during the contest so I needed to set up a station with some kind of antenna. I dug the TS50 out of the dust bin and used it. I resurrected 2 20M mobile whips, stuck them up on a pole in a dipole configuration and was on the air. As you can see in the log, I did make some interesting contacts on Sunday afternoon. I did not realize that TM4L was in France until I looked up the call after I shutdown. Nice one, considering there were no signals to be heard on Friday night at the beginning of the contest. Nice restart to a hobby I have enjoyed since 1965.

Al VE3GAM

CY9M St Paul Island

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CY9M July 26 – Aug 1, 2012

DXpedition to St Paul Island is slated for July 26-Aug 1 this year, Here is a link to their website for all of the information about this venture.

St Paul Island CY9M

cy9m team

CY9M Team

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cy9m-2

Bon voyage guys!

CQ WW Contests

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CQWW SSB Contest: 0000Z October 29 through 2359Z October 30 2011
CQWW CW Contest: 0000Z November 26 through 2359Z November 27 2011
Contest Rules

Are you participating this year? Sounds like 10m might be a major playground this year, I have seen some major reports of activity on that band lately.

72, Al

Raising the VE3STR Tower

Dietmar VE3CG and Dave VA3TD on the tower

The VE3STR tower was taken down, re-zinced and repainted and then ona beautiful morning in early October was raised again, courtesy of Yarmouth Cranes. For the full story and pictures, check out the article at the club site web site.

73, Al

7 Band Portable Dipole Antenna

7 band portable dipole antenna

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Bob Rice VE3HKY has produced another beautiful antenna, this time it is called the 7-Band Portable Dipole Antenna. I attended the London Amateur Radio Club meeting last night and he gave a talk on his new antenna. His previous 7-Band Semi-Vertical Antenna is documented at his site. His new portable dipole seems to compare nicely with the W3FF Buddipole. Contact Bob at bobrice2@sympatico.ca for more information, he has a DVD which shows him constructing one of the antennas. Let me know if you build one!

73, Al

p.s. link to video on how to build the antenna

DCTL Antenna

Here’s an interesting antenna that I would like to try out some day, made from 300 ohm twin-lead.

73, Al

Balanced Feed Line

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Dave Marling VE1VQ has an interesting article online about balanced feed line. Looks fairly easy to make using old plastic clothes hangers. Thanks Dave for posting this interesting article.

73, Al

The Venerable Dipole Antenna

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One of the simplest antennas you can use to get on the air with is the dipole. Here is an article which shows you the simplicity of the antenna and outlines how you can put one up and use it on any frequency.

73, Al