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HillTopper 40
Kitted and Offered For Sale By
The Four State QRP Group
Designed by Dave Benson, K1SWL
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Click photo for Larger Image
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Dave Benson K1SWL, founder of the renown Small Wonder Labs, listened to you and has designed a 40 meter version of his winning Hilltopper design.
Four State QRP Group is honored to have been selected to kit the new transceiver.
The Hilltopper is a high performance CW transceiver for the 40M meter band.
It is the perfect solution to your portable operation needs - small, lightweight, wide 40 meter frequency coverage and low current drain, extending the life of your portable power source.
The receiver is adapted from K1SWL’s SW+ Series with minor modifications.
The front-end circuitry was revised to replace the now-vanished 10.7 MHz IF transformers.
The receiver output is suitable for headphone use.
The transmitter strip is a proven design using three BS170 transistors for the PA.
The frequency source for both transmitting and receiving is a DDS VFO employing a Si5351 PLL module.
Control for the rig is provided by an Atmel ATmega328P.
This runs both the frequency control and the full-featured CW keyer.
A custom silk-screened PCB enclosure is included with the kit.
No drilling or cutting required!
There are two pre-installed SMT ICs on the board, but the remainder are ALL THROUGH HOLE parts, and all jacks and connectors are board mounted, the combination making this kit very easy to assemble with no external wiring needed.
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Clubs and Groups Please Note! Group discounts are available, 5 kit minimum order required.
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Specifications and Design Features
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General
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Transceiver:
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Full-function CW
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VFO:
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Si5351 PLL
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Frequency Range:
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7.000 - 7.300
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Frequency Readout:
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Audio Morse
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Tuning:
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100 hz/20 hz steps
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Reverse Voltage Protection:
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Series diode protection
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Single Bander:
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40M only.
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Size:
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The board is 4.35" x 3.95" x 1.07" and weighs 8 oz
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Power Supply:
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12 volt battery or bench supply.
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Current requrements
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Receive: Approximately 64 ma, Transmit: < 700 ma.
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Keying:
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On-the-fly CW speed control via knob or paddles
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Receiver
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Type:
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Single-conversion superhet, 5.185MHz IF
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Sensitivity:
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Minimum Discernible Signal (MDS) -118 dBm.
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Mixer:
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SA612AD 8-pin SOIC-8 IC
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Current Req'd:
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64 ma.
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QSK:
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Full QSK.
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Audio:
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Headphones.
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Transmitter
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Power Output:
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~5 Watts
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Final Amp:
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3x BS170
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Spectral Purity:
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All harmonics and spurs are 50dB
or more below the carrier.
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Current Req'd:
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< 700 ma.
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Ordering Information:
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The cost of this kit is $ 125.00
with a shipping cost of $ 11.00
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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 (U.S. $ only),
please make it out to "Four State QRP Group" for the
indicated cost of each kit purchased.
Do not forget to specify the Operating Band for the radio.
Then mail your order to:
Four State QRP Group
Johnny Matlock ACØBQ
379 23rd Road
Lebo, Ks 66856
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The HillTopper 40 is carefully kitted and shipped by
Jim Pruitt, WA7DUY
Please direct shipping, kit, and part related questions to Jim Pruitt
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All proceeds are applied toward funding OzarkCon.
Thank you for supporting The Four State QRP Group.
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