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Show and Tell - FARA Sep Meeting

posted Oct 12, 2017, 10:29 AM by L Gray   [ updated Oct 12, 2017, 1:18 PM ]









The September FARA meeting was held at the club station located on Joint Base Cape Cod.  The meeting space was overflowing with members, as shown in the photo.  The meeting featured "show and tell" short presentations from several members, which are summarized below.

Compact Mobile VHF Rig:

Don, N1JCT, showed his new VHF mobile, a Baojie BJ-218 2m/440 mobile radio purchased on Amazon for $70. Made in China. Radio dimensions ...4.5" x 4" x 1". Output….5-10-25 watts drawing max of 5 amps. Head is not detachable. Comes with programming cable. Programs with 
Chirp with appropriate software available on line. Was a bit difficult to match the software with the cable chip. (NOTE : This radio is same as Luiton 725-UV...Chirp recognizes and will program the Luiton name/model, but not the Baojie name/model! ) Can change display lights to different colors for monitoring, transmitting, receiving. 

As shown in the images below, the radio sits on a shelf below his car's dash. A factory hole in the shelf provides cable routing. The three cables: power, speaker and antenna are all routed with the help of split tubing, adhesive tie wrap mounts and tie wraps for a neat 
installation.

 
 
 


Inexpensive DMR HT:

Alan, K1AMJ, showed his newly acquired Radioddity GD-77 dual band, DMR/analog transceiver.  The radio is $99.99 with a programming cable and an extra battery.  See radioddity.com for more information.




BitX-40 Transceiver Kit:


Jason, W5IPA, showed his version of the popular BitX-40, 40 meter QRP transceiver kit.  See www.hfsigs.com for details.










American Morse Straight Key Kit:

Brent, W1NCH, showed his version of the American Morse straight key kit.
 
 

Raspberry Pi Display:

Brent also showed a display monitor for the Raspberry Pi, making a nice portable package for a Pi-based project.  The display uses a DROK LM2596 Digital Control Voltage Regulator (5-32V to 0-30V 24V to 12V 5V), $8.99, from Amazon to provide power.  The Raspberry Pi Display Screen Monitor - SunFounder 10.1 Inch HDMI 1280x800 LCD for Raspberry Pi 3 is $115 from Amazon.
 
 
 

Microwave Coax Switch:

Brent showed a microwave coax switch made from a Transco SP6T coax switch typically $20-40 used from https://www.ebay.com/ and a W6PQL 12 to 28vdc converter available from http://www.w6pql.com/12_to_28v.htm.

Headphone Amplifier:

Larry, W1IZZ, showed a headphone amplifier built from an article in August, 2015 QST.  A copy of the article and a parts list is attached below.
 
 
 

RS-HFIQ Single Board 5 watt HF Transceiver:

Larry also showed a single board SDR "kit" from HobbyPCB.  The RS-HFIQ is an open-source HF transceiver project designed to translate I and Q baseband signals to RF in the 80/60/40/30/20/17/15/12/10M Amateur Radio bands. The I and Q signals must be provided/processed by external signal processing which is usually a PC running HDSDR (open source SDR software).  The images below show the transceiver in its enclosure with a small external USB sound card from StarTech.com and show the HDSDR display.  Numerous contacts have been made using the transceiver with good audio reports.  Further information is available at www.hobbypcb.com.
 
 

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L Gray,
Oct 12, 2017, 10:29 AM
Ċ
L Gray,
Oct 12, 2017, 10:29 AM