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Bayou Jumper xcvr
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Wow that was fast! The run has sold out already, and we're temporarily out of stock.
Parts are on order and the next run will be available asap.
Thank you for the tremendous interest in this outstanding kit.
Kitted and Offered For Sale By The Four State QRP Group
Back by Popular Demand
"Return with us now to those thrilling days of yesteryear" and build the Bayou Jumper. The name "Bayou Jumper" is a play on "Ocean Hopper", a famous regenerative receiver of a bygone era. It retains that great retro look but with modernized circuitry. With it's distinctive panel and wood box enclosure it pays homage to the famous spy radios of WWII. It is designed for the CW segment of the 40 meters.
A quantity discount is available for Club and Group builds, 5 kit minimum order required.
Specifications and Design Features
General
N5IB: Original prototype development, receiver development, PCB and panel layouts, part sourcing.
NMØS: Transmitter design, PCB, panel, parts sourcing, assembly manual.
RXTX Design: Separate receiver and transmitter, built in RIT..
T/R Switching: Hand switched with a chicken head knob, just as in the old days.
Single Bander: 40M as supplied.
Toroids: Only one toroid to wind in the receiver, and none in the transmitter. Only ONE for the whole rig!
NO SMT: All parts are through hole, there are NO surface mount devices in the kit.
Current Requirements: Receiver 20-25 mA, Transmitter less than 600 mA
Enclosure: Beautiful silk screened panel and commercial wooden box, for a very retro look. Dim. L x W x H, 7.75" x 5.5" x 3.25"
Note: The box is not included in kit but is available, from HobbyLobby and
can be ordered here. Or purchased in their stores, SKU# 662536S
Travel stickers may be found here.
Receiver
Tuning and Regeneration: Grounded front panel, and insulated shafts on the controls, so hand effect detuning is minimized.
Sensitivity: -120 dB (approx S1). Well below the typical rural band noise level of approx. -100dB (approx. S4).
Tuning Range: Tuning range greater than 140 kHz
One Knob tuning: No bandset/bandspread needed.
Varactor Tuning: Varactor tuning employing readily available Schottky diodes as varactor diodes.
RF Gain: Optional RF attenuator control, useful when employing full-scale antennas.
Audio: Plenty of headphone audio, and will drive a small speaker.
Transmitter
NS-40: Integrated into the PCB is Dave's famous NS-40 Class E transmitter.
More info here
Crystal Controlled: The rig has a socket for the old-style FT243 crystals, plus 7030 and 7122 kHz crystals and included crystal adapters.
If you have old 7MHz Novice crystals, you can use them with this rig!
Output Power: nearly 5 W with 13.8 volt supply
Inductors: Etched on the PC board
Keying Options: Tx incorporates a high-side MOSFET keying transistor that will work with any key, bug, or keyer.
Also provides shaping of the RF envelope.
Spotting: A Crystal Spotter circuit is now built into the rig, "Pittsburg Style" on the bottom side of the top panel.
Final Amp: Cool running robust MOSFET.
Spectral Purity: All harmonics and spurious emissions are 50dB or more below the carrier.
Documentation
REV D (Red panel) Assembly Manual For Kits shipped after 14 May 2022
REV D (Red panel) RX Schematic
REV D (Red panel) TX Schematic
REV D (Red panel) Part List
REV D (Red panel) Suggested Tools
NOTE: The builder will need a 1.5 mm Allen wrench during assembly
REV C (Red panel) Assembly Manual For Kits shipped after 24 July 2021
REV C (Red panel) Schematics
REV C (Red panel) Part List
REV C (Red panel) Suggested Tools
NOTE: The builder will need a 1.5 mm Allen wrench during assembly
REV B (Blue panel) Assembly Manual For Kits shipped after 1 January 2021
REV B (Blue panel) Transmitter Schematic
REV B (Blue panel) Receiver Schematic
REV B (Blue panel) Part List
REV B (Blue panel) Suggested Tools
NOTE: The builder will need a 1.5 mm Allen wrench during assembly
REV A (green panel) Assembly Manual For Kits shipped after 17 April 2017
REV A (green panel) Transmitter Schematic
REV A (green panel) Receiver Schematic
REV A (green panel) Part List
ORIGINAL (white panel) PCB Assembly Manual for kits shipped prior to 17April 2017
ORIGINAL (white panel) Transmitter Schematic)
ORIGINAL (white panel) Receiver Schematic
ORIGINAL (white panel) Part List
Photo Page (Rig pix and building tips.)
Serial and Secret Agent Number Program Courtesy N5IB.
Electronics 2000's Excellent Capacitor Identification Page Posted with permission.
Electronics 2000's Excellent Resistor Code Graphic Calculator Posted with permission..
The Bayou Jumper is carefully kitted and shipped by Steve Miller NØSM
Please direct all kit and part related questions to Steve
All proceeds are applied toward funding OzarkCon. Thank you for supporting The Four State QRP Group.
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