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Pressebo Electronics specialize in "dealing with the kinds of effects" ( = solving problems) encountered with electronic equipment in instrumentation, medical, industrial, automotive and nautical environments. Including the design of "one of a kind" devices and building of the prototype.
A mechanical industry, or a hospital, for example, is not necessarily equipped to solve an electronics design- or a measurement-task. I have the experience and know-how to avoid many of the pitfalls.
I can write descriptions and procedures that can be understood and followed.
My specialty is Analog, RF and µW electronics, especially in measurements, where it branches out to encompass the faculties of fine mechanics and optics.
Some recent jobs:
I have designed low noise pre-amplifiers in Microstrip Surface Mount Technology for GPS receivers. In spite of a filter on the input, noise figures of 1.8 dB and better were frequently achieved.
CATV distribution amplifiers, flat within a few dB from 1 - 2 GHz and with 20 dBm+ output capability. Enough to carry 80 channels with very little intermodulation.
A detector for down converted DBS signal, enabling a servo system to point the antenna at the satellite from a moving vehicle. The detector causes less than 1 dB insertion loss.
For one major importer of rectifier bridges I have found a design flaw in the design of the lead frame, and taken the X-ray pictures to prove it.
Measurements on sub-ns rise and fall times on avalanche photo diodes. Designed and built equipment for measurements on surface isotropy as well as a burn-in fixture with computerized data polling and record keeping.
Design of an insufflator for use in laparoscopy. This involved the circumvention of patents, held by major players in the area and adhering to FDA rules while regulating and measuring gas flow/volume/pressure. The work also lead to the invention of a novel safety valve and flow meter in combination.
Design of a sensitive (light) detector using a modulated source and synchronous detection.
A few Inventions:
A FET-grid-dip meter with greatly simplified modus operandi and high sensitivity.
A method of displaying X-Y-Z signals in true 3D on a regular oscilloscope.
A µW meter for RF and microwave with linear power scale and temperature compensation. -50 dBm to -10 dBm. 0.1 MHz to 1.4 GHz and a very good input match.
A detector for the complex reflection coefficient from a transmission line load. Output in an X-Y format, suitable for a Smith Chart overlay. See some measurements on 145 MHz antennae below. The detector can be built for practically any frequency, and works well over one octave.
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Imagine a Smith Chart overlaid! Here: the reflection coefficients from an antenna for 145 MHz swept some ± 10 MHz. |
A resonant circuit (a Grid Dip Meter in Detector mode) is held close to the antenna. Notice the extra loop at ~ 140 MHz. |
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Reflex from a 19 el Yagi with some 12 m RG-58 cable. |
The same antenna with better cable and a "marker" on the left side of the circle. |
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Affiliations: Member AAAS Member IEEE (I have had no use of them for all of 13 years and will probably not renew next year.) Member, lifetime, IOBT (International Organization of Bio Telemetry) Member NRA Member ARRL Member VCARC (Ventura County Amateur Radio Club)
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The NRA belt buckle. |
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Mail to me.. |
Visit the RF Globalnet! |
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Last Update: May 2, 1998