|
Title: Heathkit AT-1 Plate Tank Assembly Post by: W4AMV on August 01, 2019, 11:07:50 PM Good day forum. Desire to return this Heathkit AT-1 AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
to its original glory! This was a barn storage occupant. The meter, power transfromer and choke are all original. They are 100 % spot on and so desrving to be re stored. The main issue is the plate tank link coupled coils are all gone. Looks like someone decided to try a PI network and never completed the task. I have calculated the required plate tank inductance for 40 meters as well as the link inductance. The estimated k factor for coupling is 0.2. The main inductor is 6 uH while the coupling L is 1.4 uH. If someone has an original Heatkit AT-1 Tank, I would appreciate some measurments. Coil length, number of turns, spacing between plate coil and the link. The diameter of the form. I have estimated that it is 1 inch diameter, like the oscillator tank coil. This would help me gauge if my calculations are at least in the ball park. Tnx in advance for any assistance, Alan W4AMV |