Ham operator since 1958, with technical area and electronics and telecommunications development interests, till now few times I had my ham activity interrupted.
I've executed many designs and assemblies of several ham equipment, from morse telegraphy to radio packet.
I've also experimented many antennæ types specially for HF and VHF bands, one of those is a Discone antenna with about 13MHz cutoff frequency that operated with high efficiency from 20 to 6m with no adjustment.
In 1964, with another ham, I built an ATV transmitter 'without camera', that is, the camera was designed and home built with no image tube (vidicon, orthicon, etc), only using an ancient projection TV tube (a home made flying spot scanner) and, fortunately, things worked very well.
So, I had always my technical activity operational and, when possible, updated with modern technologies.
The former figure is a TRIO model TR2500 (very ancient) FM HT transceiver photo.
This shows a common simple keyer, also very old.
This other presents an IC board of a VFO frequency (up to 7 MHz) stabilizer. It is one of my successfull electronic design because, with this board, a not synthesized commercial HF transceiver can operate even on packet radio where frequency stability is a must.
My station, now a days, is formed by:
Transceivers:
an HF Kenwood modelo TS-140S transceiver with FM repeater sub-tones
an all mode 2m Yaesu model FT480-R
an Icom model IC-229H FM transceiver for 2m
an Icom model IC-2820H for 2m and 70cm transceiver equipped for D-Star
an RCI model 5054DX100 all mode transceiver for 6m
an Icom model ID-51A HT for 2m and 70cm
a Baofeng model UV-5X HT for 2m and 70cm
a DVAP dongle for DStar on computers
a Hotspot Hkcnma for DMR and other modes
a BTech DMR 6X2 for 2m and 70cm
Receivers:
a Sony model ICF-7600SW-GR
a (SDR) Funcube Dongle Pro series 4531
Auxiliary Equipment:
an iambic keyer MFJ-422D
a simple vertical keyer Osledi
a homemade 13.8V/30A power supply
an Astron model SS-25 13.8V/25A power supply
a Kenwood model PS-50 13.8V/20A power supply
a Keletron 13,8V/10A power supply
a Yaesu modelo FC-301 antenna coupler
a home made antenna coupler
an MFJ model 1278BT TNC with 2400 e 9600Baud
two MFJ modelo MFJ-1868 wideband 25MHz to 1300MHz discone
an MFJ modelo MFJ-1524 vertical dual-banda for 2m and 70cm
an MFJ modelo MFJ-1622 vertical multiband
a Workman model UV-325 mobile vertical dual-band for 2m and 70cm
a Dell model Inspiron N7010 laptop computer
an HP model Compaq NX-9010 laptop computer
More equipment:
vector impedance meter model AIM4170 from Array Solutions
antenna analyser model MFJ259
a Hitachi model V-223 dual channel 20MHz oscilloscope
spectrum analyser model 411T from HP with tracking generator up to 110MHz
an RLC Smart Tweezers meter model STAD from AdvanceDevices for SMD components
other meters like frequencymeter, multimeters, etc
several homebrew devices
