|Click to enlarge|
Mark built a beautiful enclosure for the attenuators.
At the left you can see the two 3 dB sections, each built with a total of 7 resistors.
Click to enlarge, to see all the details.
Mark used the PA1B Power Attenuator Calculator, to design the attenuators.
You can find the Calculator on the PA1B QRPp page, This Calculator in Excel enables you to design an attenuator for any power, using common resistors from the E12-series. E.g. 1/2 watt. Mark used Open Office. Please note, that in Excel or Open Office you must use the decimal COMMA or POINT according to your national language. These attenautors are what I had in mind, when I developed the Power Attenuator Calculator. hi
The shack of DL6YYM.
I thank Mark for sending the pictures and for the great feedback on the attenuators.