Thursday, June 9, 2011

Hendricks Deluxe Tenna Dipper

So, what is the Deluxe Tenna Dipper ?
It is a 'Poor Mans' Antenna Analyzer. It gives you an indication, in this case a LED dimming, when the load (aerial) attached reaches 50 ohm. The Tenna Dipper covers ~3 MHz to 30 MHz in two bands selected by a slide switch. Thus making it really easy to tune an antenna to the frequency you want to operate on without causing interference.
It is a update to the Four Staes QRP Group kit designed by Steve Weber, KD1JV.

From K1YMI

The same basic design has been kept only now with a frequency counter in leu of the CW generator to read you the frequency. The kit has everything you need to build, including the case.

The LED is very bright! In full sunlight you will have no trouble seeing the display or LED.

Building the kit is straight forward, no real issues were found with following the directions in the manual. The only problem I had was the winding of the transformer.
Be very careful about clearing all the varnish off the wire ends and try not to scratch the varnish as you wind it onto the torroid.
When I completed my kit the LED did not light very brightly or change intensity when a 50ohm load was put across the input. The issue was tracked down to the windings in the transformer. After removing and fixing the windings it worked flawlessly. I then hot glued the transformer in position onto the PCB. This hopefully will stop anything moving while in transit.

From K1YMI

Weighing in at 300g including batteries and at a price of $75 this kit is a must for any Ham that likes to operate from the field.

The Hendricks Deluxe Tenna Dipper can be found at http://www.qrpkits.com/deluxetennadipper.html





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