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Title: What is this? Post by: W5UF on January 07, 2019, 12:26:47 PM I know it’s a tuner network but who made it and what was it used in ? Anyone with any info?
Title: Re: What is this? Post by: KC2ZFA on January 07, 2019, 02:41:25 PM it's a National MB-20 multi-band tank...it predates the MB-40L (fixed link) and MB-40SL (swinging link) units whose manual you can find in the Tech section of the AMWindow here. I believe that the MB20 and the MB40L (fixed link) are electrically identical. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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