Thread: HMV 650 Anomaly
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Old 26th Sep 2022, 9:45 am   #14
cathoderay57
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Join Date: Oct 2017
Location: Bristol, UK.
Posts: 2,364
Default Re: HMV 650 Anomaly

Thanks again for your replies. I'm clear now on how the muting control is supposed to work. I have started the refurb having completed the PSU/amp chassis yesterday which was straightforward - transformers and chokes all OK apart from needing to re-sleeve rotted and crumbling rubber-insulated wires, and replacing one HT cap that wouldn't reform. Interestingly I found a pencilled signature under the chassis from a long lost repairman dated 24/6/46 which is perhaps when some of the old radiospares replacement caps were fitted. The HMV manual specifies a 500mA HT fuse (Broadcaster Sheet says 1A ). I have fitted a slow-blow 250mA instead and will see how that goes. I only have quick-blow 100mA which I would guess might not survive switch-on surge. Jerry
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