| Current Projects |
Arv - K7HKL |
| BITX20,
BITX40, and BITX-LF SSB Transceivers |
The BITX20
Transceiver designed by Farhan - VU3ICQ features bidirectional
amplifiers in an easy-to-build layout using readily available
components. The goal is low cost with only limited test equipment
requirements for alignment. My versions do SSB & CW and have
transistor PTT circuits. Work is coming along well on VOX
circuitry, an S-Meter, and an internal Antenna Tuner. |
| 10+
Watt MOSFET (IRF510) Linear Amplifier |
This
project is related to the BITX20 design, and is my contribution to QRO
power for Farhan's little transceiver. Several versions of IRF510
based RF amplifiers are being constructed and tested. The goal is
to design and build an unconditionally stable linear amplifier that can
be driven by nearly any QRP rig. |
| Bit-locked
Frequency Stabilizer |
This is an ongoing discussion
and design
effort involving Hans - G0UPL and myself. Others are welcome to
participate as well. We have an online discussion forum at
"HuffPuff.yahoogroups.com". Please join the group if you have an
interest in non-PLL type VFO stabilizers. |
| LF-Pro
Receiver |
Design
and construction of a communications grade LF receiver for SSB & CW
on the US 160 to 190 KHz experimenter band. While this is not a
Ham Radio band, there is no reason for US hams not to use if for QRP
local or DX communications. Get yourself a copy of the FCC's
Part-19 Regs for this band and join me in the fun on LF. Since computer connectivity is provided, this receiver is also capable of any software supported mode, including PSK, MSK, RTTY, etc. Ease of construction and use of readily available parts is the design goal, along with state-of-the-art performance with either short or long antennas for this difficult frequency band. |
| VFO
Stabilizers |
This section hopefully takes the
Huff & Puff design to new heights (or lows?). |