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G8HQP Dave · 7th May 2011, 6:54 pm

You do have a DC isolating capacitor somewhere between V5b cathode and the decoder chip input pin? Connecting the decoder should not change any DC levels.

It sounds like the VHF front end has stopped working. Have you disturbed anything there? The station you can hear: is it an FM station or short-wave AM pickup?

7th May 2011, 6:54 pm	#20
G8HQP Dave Rest in Peace Join Date: Sep 2008 Location: Solihull, West Midlands, UK. Posts: 4,872	Re: A Stereo decoder for Leak Troughline 3 You do have a DC isolating capacitor somewhere between V5b cathode and the decoder chip input pin? Connecting the decoder should not change any DC levels. It sounds like the VHF front end has stopped working. Have you disturbed anything there? The station you can hear: is it an FM station or short-wave AM pickup?