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FERNSEH · 5th Jul 2017, 7:52 pm

"Unbelievable perseverance David .... and you survived it! I bet you're pawing the earth to get started on the cabinet eh?"
Can't wait to get on with the cabinet repairs. The HMV 1804 is a far betting looking set than it's EMI stablemate the Marconi VT50. Actually the cabinet repair is the last of my worries. After the set has been working for about 15 to 20 minutes the picture becomes dim and large. The measured EHT drops back to less than 3KV from the correct 4KV. It's most likely the EHT transformer is faulty. The two 0.03microfarad EHT smoothing capacitors were replaced with no improvement. That's two 1804/VT50 EHT transformers that now need rewinding.

DFWB.

5th Jul 2017, 7:52 pm	#128
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: HMV 1804 Television. "Unbelievable perseverance David .... and you survived it! I bet you're pawing the earth to get started on the cabinet eh?" Can't wait to get on with the cabinet repairs. The HMV 1804 is a far betting looking set than it's EMI stablemate the Marconi VT50. Actually the cabinet repair is the last of my worries. After the set has been working for about 15 to 20 minutes the picture becomes dim and large. The measured EHT drops back to less than 3KV from the correct 4KV. It's most likely the EHT transformer is faulty. The two 0.03microfarad EHT smoothing capacitors were replaced with no improvement. That's two 1804/VT50 EHT transformers that now need rewinding. DFWB.