What's new:
> 15 nov.. 2002 added new main menu page
link
FRONT-END FORUM (Ita)
> 07 dec. 2002 - added new links in
TECH-LINK - LIST 1 page:
AppCad ver 3.0 by AGILENT, a very nice free software by Agilent (ex
Hewlett Packard)
> 20 dec 2002 - added comments received by other
builders, I1NAI Adriano, about logaritmic amplifier version 1
performances (presented in our article in Radio Rivista (Ita) magazine). See
from main menu:
AMPL-DETECT LOG 80dB DINAMICA , at the end of the article.
> added more photos under
HOMEBREW GALLERY by I4FAF
in
SRC Front-End
and in
SRC02 Front-end
about our versions of HF RX FRONT-END project.
>added new inside photos about SRC-02 Front End unit Version 1 with Butterworth
passband filters and version 2
with Cauer pb filters at SRC02
inside photos
> 28 dec. 2002 -added two fine links in
TECH-LINK - LIST 1 page about HI FI SSB audio specialist by
NU9N and in
ANTENNA LINKS
page added link to Butternut HF2V mods article by VE6LB and KM9Z link to
Low Band DXing Tricks & Tips KM9Z 's page.
********** NEW****** started the new
TECH. LINK - LIST 2
technical links page 2 with some more interestings links.
> 20 january 2003 - added a link to KM1CC 100th Anniversary first
USA - Europe Wireless Telegraph and
pictures at IY4FGM.
> 27 january 2003 - added more links under
TECH. LINK
- LIST 2
> 01 february 2003 - ******NEW
TECHNICAL ARTICLE (our 6th article) in 3 PARTS****** about receiver and
pre-amplifier measures, RF filters and RX -Systems simulation software,
IMD, IP3, Dynamic Range and much more (a lot of formulas, data and tables. Very
interesting) !!!!.
> 15 february 2003 - added
schematic
diagrams, transformers details and board layout in our Advanced Low Cost QRP HF
Linear Amplifier page + a link to CDG2000 output lowpass filters+directional
coupler data for amateur bands.
> 17 march 2003 - added
QEX
Cover about my article in March-April 2003 issue.
> " " added links about the
town of
Bologna
> 22 march 2003 - added some more links in
Contest page
(some CW trainer software links) and in
Technical-links1 page (new
HF Titan III, by Ten-Tec, lin. ampl manual and photos).
> added new pages under
I4FAF
Homebrew Gallery (RX IF-AGC photo about W7AAZ Bill Carver design;
HF "really rugged and trusted" Linear Amplifiers with Tetrode Tubes by
I4FAF).
> 31 march 2003 - added 3 more enlarged photos about the impressive amateur
radio HF linear amplifier with
2x
4CX800A, SRC 2000 by I4FAF in Homebrew gallery (click on the photos to
enlarge).
> added another 3 more enlarged photos about
SRC 2001
improved one 4CX800A tetrode linear amplifier.
> 02 april 2003 - added link to
CQ Magazine page dedicated to VE3ERP HAMCALC, last version 1 april 2003,
now only available in CQ Magazine web site as .zip downloadable file.
> added link to the new
I QRP Club bulletin downloadable by ARI Montebelluna (TV)
>
added a link to new HF transceiver ORION, by TEN-TEC, donwloadable manual.
> 05 april 2003 added .zip downloadable file for:
9 band autoswitch with BCD band data for bandpass filters switch
> 12 april 2003 added a
link to Letter to the Editor MAY-JUNE 2003 QEX Magazine about errata corrige
and performance report about my article in March/April 2003 QEX "High-Level
Accessory Front End for the HF Amateur Bands".
Click here.
> Added a link to
PA3CKR who also has tested H MODE HF high level mixer with FST3125 (See
first CDG2000, G3SBI.
>>> Get a copy of
April 2003 RADCOM (RSGB-UK), I7SWX, Giancarlo Moda, in Technical Topics, page 82 in April
2003 RADCOM RSGB Magazine) for a practical simplified circuit about the
High Level H-MODE RF Mixer with
FST3125 integrated circuit.
> 10 may 2003 added more test data about our push-pull RF preamplifier (Output
IP2 and a comparison with one transistor Norton noiseless feedback circuit)
CLICK HERE.
> 24 may 2003: added more interesting links in
TECH-LINK LIST 2
(i.e. dowloadable file from ARRL about WA1GPO QST June 2003 30 Watts, 2 Watts in,
HF 13.8 V push-pull transistors linear amplifier and more links added)
> 03 june 2003 under
Antenna page
added some interesting links about the EH Antenna
> 05 july 2003:added more links in
TECH-LINK LIST 2
page and in Antenna page added a new close look to
EH Antennas by I4SBX (documents in italian and english).
> 20 july 2003: added more fine photos in
Linear
Amplifiers page
> 26 july 2003:
Mr. Kato JA9TTT detailed reports about H-MODE FST3125M double balanced RF
mixer in two versions, one with 3 binocular transformers and I7SWX two
binocular transformer version (that we have also
tested ourself): a spectrum analyser photos detailed full report.
> 07 aug 2003: added new links in
TECH-LINK LIST 2
page.
> 31 aug 2003: added new page about our
FST3125M
H-mode HF High Level Double-Balanced Mixer evaluation board and
performance report with 3 binoculars transformers (under construction).
>13 sept 2003: added a lot of links to
TECH-LINK LIST 2
page, a section devoted to AUDIO Freq ideas, tools, some appl notes, a link to
Texas Instruments (TI) evaluating software for LP-HP audio filters.
>10 october 2003: added more links in TECH-LINK LIST2, ANTENNA page, added
in main index page N2PK link about Vector Network Analyser (tnx to I7SWX news),
added a resume article (italian only) about XIX 2003 September Bologna HF
DX meeting G. Marconi with a link to Mediterraneo DX Club with a lot of photos.
>15 november 2003: added H-MODE LINKS in
FST3125M
H-mode HF High Level Double-Balanced Mixer and I keep a waiting list
of your e-mails (quote your call sign, amateur radio only, please) for my
H-MODE Mixer article for advise, since ARRL has accepted it for
pubblication on QEX in 2004 (QEX is an ARRL - amateur radio technical magazine).
>20 Dec 2003: a better layout of my web site pages about "High LEVEL FRONT-END
for HF" 2003 QEX article.
>05 Jan 2004: English Menu has a new article in English:
Low Cost
Mosfet QRP HF Linear Ampli "An Optimised QRP Low
Cost Mosfets HF Linear Amplifier with low IMD" with .pdf downloadable schematics
and pcb. Performances data are provided in tables.
>01 July 2004: " A Doubly Balanced "H-mode" Mixer for HF " By Sergio Cartoceti,
IK4AUY
is in July/August 2004 QEX (ARRL ) Magazine, pages 23 - 32.
Click Here for more info.
>26.09.2004 added one photo at IY4FGM from
XX HF-DX
Convention in Bologna 25-26 september 2004
>06.12.2004 IV3DDM duplicated and tested our "SRC" Cauer passband filters HF Front End with
real spectrum analyser photos of all 9 bands, and more.
>17.01.2005 added a link To a 120 pages Application Note n. 150 by AGILENT "Spectrum
Analysis Basic see below TECH-LINK LIST2
page
>02.05.2005 added
a new article (in italian) published in Radio Rivista Magazine May 2005
about our earlier experience in building CDG2000 TRX with plenty of color
pictures and our pcb for h-mode mixer with noise blanker gate and divided by 2
squarer LO input.
>22.01.2006 added .pdf downloadable file about my articles in QEX (ARRL) for
personal amateur radio interest only. See my
HF RX FRONT-END page
and High Level H-MODE RF
Mixer with FST3125M page
>22.01.2006 added .pdf downloadable file about my articles in QEX (ARRL) for
personal amateur radio interest only. See my
HF RX FRONT-END page
and High Level H-MODE RF
Mixer with FST3125M page
>08.11.2006 opened
pages
dedicated to Yaesu FT-2000 HF and 6m. new transceiver.
>updated h-mode rf mixer link page, added
PA3AKE in dept report, about 50 pages, on H-MODE (March 2007)
>April 12-2008 added
DX Station
Audio MP3 files with my FT-2000
> SAT 8 SKY TV Video "QRZ" n.98 08/05/2008" on
IY4FGM and Marconi Museum - 25 April IMD International Marconi
Day.
>May 28 -2008: updated Receiver Lab test data table: added IC-7700 (only
a few data by G3SJX in Radcom June-2008)
>Feb 4-2009: updated FT-2000 page. One more errata corrige reported
in Optimised QRP Low Cost Mosfets HF Linear Amplifier with low IMD page.
>March 29-2009: updated link in the menu page and tech link1 list to
DK4DDS web site (see TR7 Renovation for a speech compressor, audio notch, nr
dsp module add on in any home made trx, more project are presented also, like a
band by band tx drive power equalizer with 3 pin diodes and trimmer control
board)
>June
02 -2009: updated Receiver Lab test data table: added IC-7600 (only
a few data by G3SJX in Radcom June-2009)
>July 25 -2009:
added
new RX lab test data Yaesu FT-897D (SN.Jan 2009)
>July 26 -2009:
added new
RX lab test data
CDG2000DX -SRC
(SN.02 - 2009 -
by ik4auy & i4faf)
>Ago 22 -2009: added new links under
What's New on
this Web Site
>Nov 29 -2009:
>CDG2000DX
-SRC opened new dedicated page to our high performance TRX experience
>Dec 22 -2009: added more images in
I4FAF Hombrew
Gallery page
>June 02-2010:
added new
RX lab test data
CDG2000DX -SRC
and FTDX5000 06-2010; Perseus 05-2010 from Radcom G3SJX,
FTDX9000MP PEP from 07-2010 QST)
>July 29-2010:
added RX 3IMDDR
data about a new FT-2000 (pep latest firmware, sn Dec 2009)
>Jan 9-2011: added
TS-590S rx tests in RX lab test data
>April 26-2011: added
BLA 1000
RM Italy ,
KPA500
Elecraft early reviews
>March 31-2013: added foto
Stradivarius (Begali) CW Key at
http://ik4auy.xoom.it/ir4b_contest_call.htm
>March 31-2013: updated
RX TABLE with ARRL (april 2013 qst) FTDX3000 rig data