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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

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Old 17th Sep 2019, 7:55 pm   #41
Tractionist
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Default Re: Alternative EHT system for HMV 902.

I do miss Gerry!
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Old 17th Sep 2019, 11:15 pm   #42
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Default Re: Alternative EHT system for HMV 902.

The underside of the sound receiver chassis. I only have a limited stock of restuffed EMI made 0.047 and 0.05mfd capacitors which should be used only in those parts of the set which are visible. So for the time being should those polyester capacitors remain or be replaced with common TCC type 343 capacitors? The type of component that would have fitted during the 1950s. Assuming of course a set like this one was still use by then. Next to the Simpson testmeter are the original 1mfd capacitors which were removed from the set twenty years ago.

DFWB.
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Old Yesterday, 8:45 am   #43
peter_scott
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Default Re: Alternative EHT system for HMV 902.

Well I restuffed the caps in my sound receiver but I'm a hypocrite because I didn't recreate the dog bones in my focus chain but left the originals in there beside the modern parts.

Peter
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Old Yesterday, 9:42 am   #44
beery
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Default Re: Alternative EHT system for HMV 902.

Hi all,
this is how I tackled the bleeder chain resistors on my HMV 905.
These resistors are available from one or two sellers on ebay.
I think they were 2W and of course EHT rated. I didn't want to use original resistors in this part of the circuit for safety reasons and of course in David's case here, there is the added incentive to fit something more reliable due to the difficulty of access to the EHT PSU in his set.

Pre-war style resistors are hard to find in good condition and to make it worse EMI even had their own with cast ends.

Cheers
Andy
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Old Yesterday, 9:24 pm   #45
davyrocket2
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Default Re: Alternative EHT system for HMV 902.

Hello David the 343s as availability permits .


Andy yours look very neat nice work
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