UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Karen O · 6th Nov 2018, 5:04 pm

Many years ago, back in the days when a tablet computer was something that took up an entire floor of a drug company HQ, I built an HF radio by using a 455kHz IF transformer as the tuned circuit of a ZN414. The link winding was driven by a FET frequency changer. It worked, but selectivity wasn't good, as you'd expect.

6th Nov 2018, 5:04 pm	#10
Karen O Rest in Peace Join Date: Jul 2011 Location: Bridgnorth, Shropshire, UK. Posts: 787	Re: ZN414 and TA7642 radios Many years ago, back in the days when a tablet computer was something that took up an entire floor of a drug company HQ, I built an HF radio by using a 455kHz IF transformer as the tuned circuit of a ZN414. The link winding was driven by a FET frequency changer. It worked, but selectivity wasn't good, as you'd expect.