UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Looking to build RF detector probe for low frequency

David G4EBT · 2nd Feb 2019, 5:04 pm

The was the one designed by RF Haigh in Radio Bygones No 83, back in June/July 2003 as a follow-up to the Wobbulator which featured in the preceding issue. The probe was built on a small PCB and housed in a small plastic probe box 2.5cms square x 12cms long, along with a PP3 battery and two slide switches - one for on/off. the other for high/low sensitivity. All a bit of a tight squeeze in the box.

The article ran to five pages - I've attached page one, which shows the circuit and may enable you to decide if the design would meet your needs.

Hope that may be of interest.

2nd Feb 2019, 5:04 pm	#3
David G4EBT Dekatron Join Date: Feb 2003 Location: Cottingham, East Yorkshire, UK. Posts: 5,763	Re: Looking to build RF detector probe for low frequency The was the one designed by RF Haigh in Radio Bygones No 83, back in June/July 2003 as a follow-up to the Wobbulator which featured in the preceding issue. The probe was built on a small PCB and housed in a small plastic probe box 2.5cms square x 12cms long, along with a PP3 battery and two slide switches - one for on/off. the other for high/low sensitivity. All a bit of a tight squeeze in the box. The article ran to five pages - I've attached page one, which shows the circuit and may enable you to decide if the design would meet your needs. Hope that may be of interest. Attached Thumbnails __________________ David. BVWS Member. G-QRP Club member 1339. Last edited by David G4EBT; 2nd Feb 2019 at 5:10 pm.