Digital Mode Transceiver




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     ** Shipping Update **

Round 4 all shipped!

Round 5 all shipped!

Round 6 kits being prepared. Should ship starting June 19.


       ** All Builders **

Always use the latest version of your manual, as posted on the Documents page,  We make corrections and additional notes in them from time to time and it's important that you are using the latest information.


Round 1 (100 kits): 
   All shipped by Jan 4

Round 2 (100 kits):
   All shipped by Jan 16

Round 3 (100 kits):
   All shipped by Mar 9

Round 4 (125 kits):
   All shipped by May 9

Round 5 (100 kits):

   All shipped by June 5)

Round 6 (100 kits):
   Kitting in progress and

   accepting orders!

   Shipping to expected to

   start June 19


(Now with Rev C Troubleshooting Manual!)

The Phaser Digital Mode Transceiver
is a single-board, 4-watt SSB radio specifically designed for using digital modes with computers running WSJT-X, DigiPan, FLDIGI and most other digital mode applications.


The Phaser gets reviewed in QST for July!         

(Members can see the electronic issue at            

click image for full view


A Single-board, 4-watt
Digital Mode SSB Transceiver
for 80, 60, 40, 30, 20 or 17 Meters

... designed by Dave Benson, K1SWL

Frequency coverage*:

   Phaser-80 board:    3.573 MHz (FT8) and 3.578 MHz (JS8/Alt)

   Phaser-60 board:    5.357 MHz (FT8) and 5.357 MHz (FT8/Alt)

   Phaser-40 board:    7.074 MHz (FT8) and 7.078 MHz (JS8/Alt)

   Phaser-30 board:  10.136 MHz (FT8) and 10.130 MHz (JS8/Alt)

   Phaser-20 board:  14.074 MHz (FT8) and 14.078 MHz (JS8/Alt)
   Phaser-17 board:  18.100 MHz (FT8) and 18.104 MHz (JS8/Alt)

      * FT8 frequency hard-coded

      * Alt frequency soft-coded to JS8, user reprogrammable

Tx operation: Phasing SSB

Tx power output:  4 Watts (nominal)

Receive MDS: -109 dBm

Adjustments:  Tx Drive

Frequency Calibration: 1-time

User Programmable ‘Alt’ frequency: 100 kHz to 30 MHz, 1 kHz resolution
                                                        No external interface required.

Dimensions4.125” x 3.85” x 1.20”

DC Power: 12V @ 130ma (Rx), 1A (Tx)

SMT components:  8 (pre-installed)

Kits:  All version available: 80m, 60m, 40m, 30m, 20m and 17m

Enclosure: Kits optionally available ... See below.


NEWS! ... University of Tennessee ARC

N2APB present Phaser #001 to the University of TN Amateur Radio Club. This first Phaser was assembled and generously donated to the young hams of UTARC by Ken Hopper, N9VV.  Thank you Ken!

Click on photos above to see larger view.

See the 7-page article in CQ Amateur Radio Magazine for Feb 2020 ...



Photo Gallery:


Graham VE3GTC controls Phaser #176 frequency using Arduino

for CAT control from FLDIGI.
Also reports WSJT-X control of Phaser using HAMLIB
and manually via RIGCTL.


Jim N3VXI shows off his Phaser #177 controlled by Raspberry Pi

First contact on Monday April 6, 2020


Gwen NG3P shows off a STUNning view of her 4W Phaser.
(Note the Tx Indicator LED mod on front panel)


Initial contact at TLARC Group Workshop in November!


K1SWL's Family Photo (Phaser-80, -40, -30, -20)



First 17M contact with Phaser-17, by K1SWL  (click photo)


80M conditions at dawn East Coast U.S.

 (No Europeans, since it's midday there.)



K1SWL working Belgium


First Contact! (Sam KV4XY) ... Click photo

(Note the mic input to PC is too hot ... Must reduce mic gain.)






The Phaser is capable of transmitting and receiving on the 80m, 60M, 40m, 30m, 20m or 17m amateur bands.  Each of these monoband transceivers is programmed to operate first at the popular FT8 frequencies, while a pushbutton entry shifts the operating frequency to an alternate frequency of the user’s choice, initially provided at the JS8 ‘watering hole’.  This ALT frequency may be easily reprogrammed to be anywhere in the HF spectrum, thus providing frequency flexibility to accommodate other digital modes such as PSK31, JT65A, WSPR, Feld Hell, Olivia, SSTV, etc.

To ensure efficient use of spectrum in operation, the transmitter features an adjustment-free phasing single-sideband (SSB) design.  The use of precision components provides unwanted sideband suppression in excess of 30 dB across its operating range, thus minimizing inadvertent QRM to other operators on the (unused) lower sideband.  The use of SSB also eliminates the issue of out-of-phase signal cancellation at the Phaser's direct-conversion receiver. As such, it allows Phaser users to communicate with each other.  This is a clear advantage over the use of 'entry-level' double-sideband (DSB) transceivers.


Phaser hookup diagram showing simple interface to the PC running WSJT-X


Build-a-thon workshop at local Ham Radio Club

In order to thoroughly test the design of the PHASER, we conducted a build-a-thon workshop with the local ham radio club here in Tennessee ... Tellico Lake Amateur Radio Club (TLARC).

Ten hams participated in the workshop, with kitbuilding skills ranging from novice-to-medium.  The PHASER kit was designed to be assembled using only through-hole parts (seven surface mount devices come pre-assembled on the PCB), so construction was straightforward while carefully following our good assembly guide.  We had reserved two afternoons that weekend to complete the kits, and by the end of the second session five hams had successfully completed and tested their PHASERS and immediately got on-the-air to achieve their first digital mode contacts!  The others needed some extra time to finish their assemblies but were on the air later that week.  Soldering skills were honed during the club workshop, and everyone came away with newfound talents for winding toroids.

See below for some shots of our workshop:




Download PDF of "Phaser Schematic, Page 1" ... 80m/40m and 60m and 30m/20m and 17m


Download PDF of "Phaser Schematic, Page 2"



(Separate/Optional Purchase)


This a custom Enclosure Kit for the Phaser Digital Mode Transceiver. The kit is comprised of interlocking fiberglass panels designed to be soldered together along the inside mating edges, thus providing a strong and attractive case for the Phaser.  All panels have red soldermask to present nice, shiny surfaces, and the front and rear panels are silkscreened with labels for all the included controls and indicators. 

The Enclosure Kit includes all parts pictured in the lower-right photo, and can be assembled in about one hour.  The Enclosure Assembly Manual may be downloaded from the 'stack of links' in the upper left corner of this page.

The finished Enclosure measures 5” wide, 4-1/2” deep, 1-7/8” high.


~ Click on any photo here to see full-res view ~






Enclosure Kit all packaged and ready to ship!



Phaser Kit Parts Cards


Bag 1 and Bag 2 all packaged up and ready to go!



Nine (9) cards in all ... Stack 'em up in a card file, small shoe box, old cigar box, or whatever to provide easy access to the parts when called for in the Instructions!

(This unique parts management system is the brain child of master kitter Larry K3PEG with its genesis coming from kitting up many projects for NJQRP, AmQRP and Midnight Design over the years.)





From: Jim and Debbie N6TYD/4 ...
In the last 2 weeks with just a portable, 6 foot helical whip antenna from Grid EM74/N. Georgia on FT8/FT4 farthest contact is St. Lucia at 2,000+ miles.  Farthest reception was yesterday, ZL1/Grid RF72, 8,098 miles at 20:40Z.  Have received several Western Europe stations daily in the late afternoon.  The Phaser is definitely a top performer, especially since the only test gear available to date has been a dummy load.  So there's probably room for further Phaser and antenna optimizing.  .

From:  RC, WW5RCA ...
Phaser-20 #518 was built for me by Jim Ragsdale (W5LA) in 8 hours. It was activated on 15 Jun 20 and has been on the air now for 10 days. In that time I've made 85 contacts in 25 of the 50 states and 2 countries, Mexico and Puerto Rico. Power output is 4 watts. I'm using an Isotron-20 antenna sitting on the third floor balcony of my apartment. That has a VSWR OF 1.3:1.I'm also using a 20m center loaded dipole suspended from the ceiling inside the apartment. It has a VSWR of 1.7:1. The PSKREPORTER <> which is similar he Reverse Beacon Network is reporting spots from British Columbia to Venezuela. This little radio is awesome. I would expect nothing less from Dave Benson (K1SWL) and George Heron (N2APB). Thanks guys!



Dateline: May 5

Round 4:  Shipping of all 120 kit is nearly complete. 
Round 5: Round 5 orders nearly filled up.  Parts and PCBs are now in and we're making up the card sets, preparing for start of shipping on May 15.



Phaser-80:  $55  (PCB & Parts Kit for 80 meters) ..........
NEW! ==> Phaser-60:  $55  (PCB & Parts Kit for 60 meters) ..........
Phaser-40:  $55  (PCB & Parts Kit for 40 meters) ..........
Phaser-30:  $55  (PCB & Parts Kit for 30 meters) ..........
Phaser-20:  $55  (PCB & Parts Kit for 20 meters) ..........
Phaser-17:  $55  (PCB & Parts Kit for 17 meters) ..........
       NEW! ==> 60M Conversion Kit:  $10: US & Canada (includes shipping)..........

$25: DX (includes shipping)..........................
Enclosure Kit:  $25 ..........


 Automatically added when checking out:

US: Priority Mail = $10  (3-5 business day delivery)

DX: First Class Mail = $30 (10-20 business days  )

For Expedited DX Shipping (6-10 business days)Additional $30  ....  


... OR ...


Check or Money Order:

 Midnight Design Solutions

205 Okema Trace

Loudon, TN 37774  USA

Fine Print
Prices, availability and product specifications are subject to change at any time.
Customers accept all responsibilities for following safe and approved assembly practices and product usage.
Orders are typically shipped within 1-2 weeks due to order preparation.
All orders are acknowledged by email, usually within 24 hours.  If acknowledgement is not received, please contact N2APB directly.

Contact Us


Discussion List: Chat With The Designers ...


Questions? Email to George N2APB ...


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Copyright 2019-2020 Midnight Design Solutions, LLC.  All Rights Reserved.
Page last updated:  May 2020