Emphasis on the high bands (902 thru 10 GHz) had been a priority here at ARS KMGT for the last few years. The low bands were in pretty good shape, so not much other than standard maintenance was needed there. However, improvements to the microwave station for the high bands have been a main focus with lots of options considered along the way. Initial operations using a FT-100D as my 144 MHz IF
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for the high bands worked just fine, however it became apparent unless everyone (including myself) was on a phase locked frequency reference, then finding signals were always a bit of a struggle. In order to maximize microwave QSOs during the various contests, a visual representation of the band would be ideal in helping eliminating one of the variables of making a microwave QSO. The Icom 756 series of radios with the "bandscope" seemed to be the ideal candidate for driving the microwave equipment. In 2002, I started using an Icom 756 Pro II as my IF radio at 28 MHz. I used that to drive a SSB Electronics LT2S 144 MHz transverter. That in turn was used to drive the microwave transverters. It was immediately evident that the bandscope was useful, but not all that sensitive. Fairly good signals on the microwave bands needed to be present in order to make good use of the bandscope. However, this setup came to be very handy and fairly enjoyable for microwave use. Aside from the bandscope sensitivity and other operating quirks of the 756 Pro II, it was the best I could do at that point. See the Original write-up on the Icom 756 Pro II interfacing for details on this setup. I met Ken - K5UHF from his roving expedition up here during the June VHF 2001 Contest. Ken and I had a good time working each other as he roved from North Dakota on his way back to Texas. Later on, we met up at the CSVHFS Convention in Dallas that July. At...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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