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March 15, 2012

Comments

Carl Schwab

John, I found the "Grid Dipper" most useful when doing the design of low power transmitters. Typically they used fundamental frequencies and combination of doublers and triplers. I still have a Heath Kit “Dipper” but still prefer the General Radio unit.
When I first came to Hazeltine in 1951 one of my first projects was to design a 10Mhz bandwith IF amplifer centered at 60Mhz. The “Dipper” was a handy tool.-----Carl schwab

Jerry Meyerhoff

Thanks Jon & Colleagues. I still have a HeathKit (real) Grid dipper from my "childhood" Ham Radio days . It was already built when I got it. I had to make several of the missing coils. Used my simple regenerative 4 band Knight Kit Span Master, short wave receiver , a kit which I did build, to get their inductance to the indicated frequencies. It enabled a lot of home brew projects up thru 6 meters 50 MHz and just into 2 meters also . Best tool ever for someone on a budget. I used a General Radio at Motorola to amaze folks demonstrating PCB fixture resonances that were artifacts in one TEM Cell EMC setup. Its part of my "Romance of Resonance" recollections. 73 , WA9FIY Jerry , JDM LABS LLC

William Ketel

I still find the dipper useful on occasion, although now there is a very simple circuit that makes an antenna analyzer deliver the same functions as a dipper. Of course the antenna analyzer costs many times what my grid dip meter cost. The adapter works by presenting an impedance of fifty ohms when the circuit that it is coupled to is at resonance.

Print Circuit Board

I hope it will be a great pleasure to visit your blog again when I come back with my kids from school.

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