UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Reel to reel valved tape recorder Geloso G258, problem

Boulevardier · 14th Oct 2019, 10:32 pm

I think you're at the stage where you just have to do some of the voltage checks suggested by Techman earlier in the thread. Watch out for any obvious voltage changes as it gets to the 10-minute point, and look very carefully for any signs of overheating. You will have to do this with power connected, so careful what you touch. To get access to make these readings, you may also have to disconnect the motor to avoid mechanical chaos. In particular, make a point of watching the voltage across the 32uF and 16uF capacitors and make a note of these voltages. You need to watch for a voltage that changes as you approach the 10-minute point.

14th Oct 2019, 10:32 pm	#19
Boulevardier Octode Join Date: Sep 2017 Location: Bristol, UK. Posts: 1,659	Re: Reel to reel valved tape recorder Geloso G258, problem I think you're at the stage where you just have to do some of the voltage checks suggested by Techman earlier in the thread. Watch out for any obvious voltage changes as it gets to the 10-minute point, and look very carefully for any signs of overheating. You will have to do this with power connected, so careful what you touch. To get access to make these readings, you may also have to disconnect the motor to avoid mechanical chaos. In particular, make a point of watching the voltage across the 32uF and 16uF capacitors and make a note of these voltages. You need to watch for a voltage that changes as you approach the 10-minute point.