UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Aerial blocking circuit for TRFs anybody any ideas

Skywave · 25th Feb 2020, 12:59 am

Possibly: one L and two Cs. However, for a deep, sharp null at the required freq., the Q of that coil will need to be quite high - probably in excess of 300 - which could be quite difficult to obtain at MW freqs.

Al.

25th Feb 2020, 12:59 am	#13
Skywave Rest in Peace Join Date: Jun 2006 Location: Chard, South Somerset, UK. Posts: 7,457	Re: Aerial blocking circuit for TRFs anybody any ideas Possibly: one L and two Cs. However, for a deep, sharp null at the required freq., the Q of that coil will need to be quite high - probably in excess of 300 - which could be quite difficult to obtain at MW freqs. Al.