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"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 radio has a socket for the old-style FT243 crystals, plus 7030 and 7122 kHz crystals and included crystal adapters. If you have old 7 MHz Novice crystals, you can use them with this radio ! |
| 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. |
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| Ordering Information: | ||
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The cost of this kit is $ 125.00 with a shipping cost of $ 0 |
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DX Buyers, check HamRadioLand for availability. |
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Note to Canadian Purchasers:
Due to high bank processing fees, we can no longer accept Canadian Money Orders. |
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If paying by check or money order (US $ only)
please make it out to "Four State QRP Group" in the amount of $125.00 for each kit purchased, and mail to:
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The Bayou Jumper is carefully kitted and shipped by
Steve Miller, N0SM
Please direct shipping, kit, and part related questions to Steve Miller
All proceeds are applied toward funding OzarkCon.
Thank you for supporting The Four State QRP Group.
The files and images on this site unless otherwise noted are copyright by
the Four State QRP Group and may not be published or used without permission.