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Television Standards Converters, Modulators etc Standards converters, modulators anything else for providing signals to vintage televisions. |
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Thread Tools |
7th Dec 2009, 10:12 pm | #41 |
Dekatron
Join Date: Jul 2007
Location: Evesham, Worcestershire, UK.
Posts: 4,244
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Re: TVONICS Freeview with Modulator!
By complete coincidence, I've just done the same with a Prism - this takes 800-850mA when working, and ~600mA in Standby. According to the manual, it should consume 6.2W on, and 5.5W in Standby (remember that the supplied PSU is 5.3W!). For the (newer) MFR-200, the quoted values are 5W and 1.5W.
So the quoted values have some "headroom", but aren't massively over-rated. Wonder if they're measured at the mains input? That would suggest a PSU efficiency of around 70% - not unrealistic... The Prism doesn't run warm, but it's in a much larger case which is an aluminium extrusion... |
7th Dec 2009, 10:32 pm | #42 |
Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 27,943
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Re: TVONICS Freeview with Modulator!
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8th Dec 2009, 8:09 pm | #43 |
Octode
Join Date: Jul 2006
Location: Willand, Devon, UK.
Posts: 1,023
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Re: TVONICS Freeview with Modulator!
I know I was surprised too, this makes it more difficult to power. I wanted to use the separate internal 12v psu that powers the tv to power the TVonics once I built it in. This way it would also be powered when run from a 12V battery. This would almost certainly overload the mains PSU as I doubt there is much headroom designed in.
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