|The Heathkit story
The Solid State Dip Meter HD-1250 came on the market in 1975 and was produced until 1991. It replaced the Tunnel Dipper HM-10 and HM-10A. The HM-10 came on the market in 1961 and the somewhat refined HM-10A replaced it in 1962. The HM-10A was produced until 1970.
The HD-1250 is a very handy little tool. It has been very useful for me when tuning my antennas. It uses 7 changable coils to cover the range of 1.6 ... 250 MHz.
See my GD-1B for further information.