Digital Mode Transceiver
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Documentation (rev A9):
Round 1 (100 kits):
Round 2 (100 kits):
Round 3 (100 kits):
NEW! ... Phaser Now Available for 17 Meters!
Phaser Digital Mode
A Single-board, 4-watt
... designed by Dave Benson, K1SWL
Phaser-80 board: 3.573 MHz (FT8) and 3.578 MHz (JS8/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)
14.074 MHz (FT8) and 14.078 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
Programmable ‘Alt’ frequency:
100 kHz to 30 MHz, 1 kHz resolution
Dimensions: 4.125” x 3.85” x 1.20”
DC Power: 12V @ 130ma (Rx), 1A (Tx)
SMT components: 7 (pre-installed)
Kits: All version available: 80m, 40m, 30m and 20m
Enclosure: Kits optionally available
The Phaser is capable of transmitting and receiving on the 80m, 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.
Family Photo (Phaser-80, -40, -30, -20)
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.)
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.
Group build-a-thon workshop at our Ham Radio Club
In order to thoroughly test the design of the PHASER, we conducted a group 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 2"
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 here.
~ Click on any photo here to see full-res view ~
Enclosure Kit all packaged and ready to ship!
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.)
|Phaser-80: $55 (PCB & Parts Kit for 80 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) ..........|
|NEW! ==> Phaser-17: $55 (PCB & Parts Kit for 17 meters) ..........|
|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 )
... OR ...
Check or Money Order:
Midnight Design Solutions
205 Okema Trace
Loudon, TN 37774 USA
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.
Discussion List: Chat With The Designers ... https://groups.io/g/cwtd/topics
Questions? Email to George N2APB ...
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Solutions, LLC. All Rights Reserved.
Page last updated: Jan 24, 2020