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

Leon Crampin · 12th Oct 2017, 11:14 pm

If you can trim the RF front end, the AM performance will almost certainly improve. I wonder if the ferrite rod permeability changes with age.

Don't risk getting the set hopelessly out of alignment, but if you feel confident setting it up, preferably with a generator, you will find the AM to be good - better than a contemporary Hacker. Anyway, glad they both now work.

Leon.

12th Oct 2017, 11:14 pm	#38
Leon Crampin Octode Join Date: Nov 2005 Location: Surrey, UK. Posts: 1,874	Re: Grundig Concert Boy 1100 If you can trim the RF front end, the AM performance will almost certainly improve. I wonder if the ferrite rod permeability changes with age. Don't risk getting the set hopelessly out of alignment, but if you feel confident setting it up, preferably with a generator, you will find the AM to be good - better than a contemporary Hacker. Anyway, glad they both now work. Leon.