UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Lafayette Model HA-600A VERY DEAF

ChristianFletcher · 28th Apr 2021, 7:57 pm

Hello Hamish and thanks. So just short of the filter with small capacitor and see if the level increases. I don’t have any direct control of SW4 it must be ganged with either the band select or function switch. Probing around the FET 1 with a signal tracer I don’t get anything on SGD. but I do get a signal on the base of TR1 but nothing on the Emitter or collector. I should probably change out FET 1 as the most likely problem

28th Apr 2021, 7:57 pm	#5
ChristianFletcher Heptode Join Date: Dec 2003 Location: South Yorkshire, UK. Posts: 900	Re: Lafayette Model HA-600A VERY DEAF Hello Hamish and thanks. So just short of the filter with small capacitor and see if the level increases. I don’t have any direct control of SW4 it must be ganged with either the band select or function switch. Probing around the FET 1 with a signal tracer I don’t get anything on SGD. but I do get a signal on the base of TR1 but nothing on the Emitter or collector. I should probably change out FET 1 as the most likely problem __________________ Every Silver Lining Has Its Cloud https://youtube.com/channel/UCvBpiuUUnErJlNBm6DWb3Ww