News

Products

 The new products have been arriving thick and fast! A new series of amplifiers starts with a VHF Broadband Amplifier in an Original Size FLEXI-BOX covering both the HF and VHF bands and  giving +20 dBm output. Includes supply regulation and output protection circuits. There is also a Voltage Detector in a Micro Size FLEXI-BOX for frequencies up to 300 MHz  and power input up to 10 Watts, plus a Low Voltage Detector in a Micro Size FLEXI-BOX that extends the frequency range to 700 MHz.

Website

   The website continues to enlarge with a Amplifier dc Condition Calculator  The calculator has been in use at Chemandy for a couple of years and has proved most useful even though its capacity to simulate circuits is limited to quiescent dc conditions.

A new article has been added  called How does a stub filter work and will hopefully enlighten engineers to the reality of what really happens to the signals within a stub filter. There is no amazing revelations from this study but it fits nicely with the findings of the following transmission line study and hopefully explains yet another mythical short circuit.

 The content in the article Understanding Coaxial RF Transmission Lines by Measurement and Calculation has now been almost totally re-written and laid out better to make it easier to read.  The article is still regarded as being un-finished because it needs confirming by a third party that the results are correct and the conclusions reached are logical. So, if you do have any comments on this article we would most appreciate them.

 The appearance of the website has changed a little with the fonts and some images made a little lighter and hopefully easier to read. The colour contrast has been increased on some pages. The products pages have been changed in order to make them more in line with current layout trends. Thus making them easier to use. Those with the latest browsers will see a softening of the appearance from some rounded corners and we have still kept the site as fast as possible. We do not have any advertisements because they clutter the pages. The website is still faster than 95% of all websites and we intend to keep it that way.

     The whole website is currently optimised using Explorer 6.0 & 8.0, Mozilla Firefox 3.6.13 and Opera 11.0 browsers