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January 2011 Archive


10 January 2011

The Z10043A page is up and may be viewed by clicking here. The Z10043A is available immediately.


08 January 2011

December and January have been the busiest months at Clifton Laboratories yet and it has not left much time to maintain this web site and to expand my investigations into the world of electronics.

One of the things that has kept me busy is the Z10043A, "mini-Norton amplifier" which is a physically small Norton amplifier, usable from 100 KHz to 30 MHz, pictured below.

The amplifier is 2.5 inches x 2.0 inches and 0.75 inches thick. (Some components are mounted on the PCB's lower surface, and the total thickness is 0.75 inches.)

The Z10043A will be available for order within the next few days. At the moment, I'm completing the assembly and operations manual and hope to have it posted tomorrow.

The Z10043A is the best and most consistent performing Norton amplifier I've built. One measure of the consistency is that bias adjustment potentiometers are not required. In addition, input and output transformers are commercial units from Mini-Circuits. The feedback transformers are wound on binocular cores, which is considerably easier than toroid cores in other Clifton Laboratories Norton amplifiers.

I've built 4 of these amplifiers and found OIP3 between +49 and +51 dBm and OIP2 between +90 and +110 dBm with a noise figure of 2 dB.

It is possible to achieve a noise figure of approximately 1.4 dB with component changes to reduce the idle current in Q1 and Q2, but there is considerable degradation in OIP2 and OIP3.

08 January 2011

As usual, the prior month has been moved to an archive page, readable by clicking here or via the navigation table at the top of the page.