Yesterday I run the first test of my rebuilt Heathkit SB-220 HF - TopicsExpress



          

Yesterday I run the first test of my rebuilt Heathkit SB-220 HF power amplifier. This thing was previously converted to 6m band and became the subject of a famous QST article by Mick (W1JJ) and Steve (K1SG) back a few years ago. This time I wanted to make it work on HF so I had to restore the input and output networks. First tests showed that the darn thing works but looks like I am slightly off on the output pi-network inductance. Now I need to figure out a way to find the right place on coils for the band taps. Anyone can suggest me a good methodology? Thanks in advance.
Posted on: Fri, 28 Mar 2014 02:42:52 +0000

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