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thejazzageuk · 16th Feb 2017, 11:59 pm

Thanks Techman, Herald1360 and PLJ. Lamp limiter is still in place. I will do all the checks suggested, here is the story so far...
I have connected the 10mf capacitor in parallel with the 2 caps identified in the earlier photo (C43 and C38)- but no change to hum level.

Will check R45 and R46 tomorrow.

Checked R50 and R51. For R50, multi-meter on 200K range steadied at around 40K and for R51 at around 100k. I think both should be 100K. When powered up with limiter, there is 48V across R50 and 170V across R51.

Also I checked Voltage between Live and neutral on the mains plug- only around 9 ohms according to the meter.
I would prefer to only replace components that need replacing. Will do more checks tomorrow.

16th Feb 2017, 11:59 pm	#145
thejazzageuk Pentode Join Date: Feb 2014 Location: Carmarthen, Wales, UK. Posts: 238	Re: Restore a Beau Decca Thanks Techman, Herald1360 and PLJ. Lamp limiter is still in place. I will do all the checks suggested, here is the story so far... I have connected the 10mf capacitor in parallel with the 2 caps identified in the earlier photo (C43 and C38)- but no change to hum level. Will check R45 and R46 tomorrow. Checked R50 and R51. For R50, multi-meter on 200K range steadied at around 40K and for R51 at around 100k. I think both should be 100K. When powered up with limiter, there is 48V across R50 and 170V across R51. Also I checked Voltage between Live and neutral on the mains plug- only around 9 ohms according to the meter. I would prefer to only replace components that need replacing. Will do more checks tomorrow.