EGV-9B 80 to 10m QRP CW Transceiver Kit Page 2
INTRODUCTION
This EGV-9B transceiver is probably the kit that I have produced with more care and illusion in my life.
It is a great honor to name this kit "EGV", the callsign suffix of the late Miguel Montilla, EA3EGV (SK).
With no doubt, this is the kind of kit he liked most.
It was my privilege to establish and share with him the first years of the EA-QRP Club. He has always
been a referent in my life; when I remember those wonderful years his humbleness, work capacity and
generosity are the virtues which shine his image.
How lucky I was to be able to share the path with you, Miguel. Thanks! Javier Solans, ea3gcy
Miguel Montilla, EA3EGV (SK)
Miguel got his A class callsign in 1983. He hold previously the call EC3BAY. He was a good CW
operator, highly respected among their peers. Holder of many awards and winner of several contests,
Miguel enjoyed both the competition and sharing his time with a novel operator, patiently providing
information to make a QSO.
He published articles on the journal from URE (Spanish Radio Amateur Union) Unión de
Radioaficionados Españoles, on “CQ Radio Amateur” (Spanish edition) and on the G-QRP bulletins, etc.
But, without doubt, what he liked most it was QRP kit building. He loved to build a kit over a weekend
and enjoy some placid QSOs made with his new fresh transceiver. Of course, always with the minimum
power required!
Miguel EA3EGV was the founder member #1 of the EA-QRP CLUB.
On September 1994 a group of four hams, Miguel Montilla EA3EGV, Miguel Molina EA3FHC, Vicenç
Llario EA3ADV and myself, Javier Solans EA3GCY, founded the EA-QRP.
EGV-9B
The EGV-9B is the evolution of the legendary EGV+ kit.
The EGV-9B is a 80 to 10m QRP CW transceiver design based on the NE602 integrated circuit used as
a receiving mixer and CW demodulator. Band and TX / RX switching, audio mute etc. they are controlled
by an ATMEGA328 processor (Arduino NANO compatible).
The EGV-9B is a very versatile design. To facilitate assembly and experimentation, the circuit is
developed on a main board and a plug-in board with the low-pass and band-pass filters. The Local
Oscillator, BFO and CW TX signal are generated by a SI-5351 module that is controlled by the
ATMEGA328 processor. Frequency and other performance data is displayed on a 1.3 "OLED screen.
The CW transmit signal is generated and keyed directly, there are no heterodyning or mixing with other
signals. The IF crystal filter is also mounted on a small plug-in board, which makes experimentation
easier.
The EGV-9B includes features like CW keyer and beacon, audio Mute, six frequency steps in two
ranges, S-Meter and RIT. Separate adjustments for headphone, speaker, RX volume, and sidetone
volume. Setting menus for BFO, SI5351 Xtal adjust, voltmeter adjust etc.
There are only five controls: Frequency tuning, Band tuning, Volume, RF attenuator and two UP-DOWN
band switches.
KB-2 automatic keyer circuit is included on EGV-9B board. It offers iambic A and B mode, 4 memories
and various settings (speed adjustment, adjustable lateral tone, tune function, beacon, straight keyer,
etc).
