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    1. R

      Start Up Fails When HDD Connected

      That 4.7uF is in a 'Miller' soft-start slow-off circuit (along with the very slightly lossy 100uF electrolytic as a Zobel network) intended to prevent resonant over-volt spikes on the "long" inductive 12V power line to the HDD from damaging eiher the FET or the HDD. Been there done that!
    2. R

      Start Up Fails When HDD Connected

      Those are similar to what I found. My scope is much simpler, an old Picoscope but your pic 2 was what I saw with the old caps, and your pic 1 in the previous post with the new caps. I simply replaced any of the big caps on the PSU card that might have the high switching frequency present. I...
    3. R

      Random switching on of FVP-5000T

      Agreed. Failures can also happen in some rare instances when they are turned Off! In one of my 1980s design prototypes (300 Watt linear lab PSU) the mains transformer primary was failing with a short circuit after just a few weeks. I asked the transformer manufacturer about it and he...
    4. R

      Media mistakes

      Being somewhat OCD I've recorded fuel and mileage etc in a spreadsheet for each car since my CP/M days. It can be a useful pointer to any creeping unreliability, or poorer driving habits.... While I was still commuting I soon became used to rating economy in miles per litre, ten being the target.
    5. R

      Media mistakes

      Acre is 4840 sq yards. It is a bit like remembering a mile is 1760 yards, and a ton is 2240 lbs, it either sticks forever (if old enough to have learned it at junior school) or never. Then a cricket pitch is a chain long, 22 yards, and a furlong is 220 yards or ten chains. These are handy...
    6. R

      The Dash Away From (Natural) Gas

      Make sure it has a stainless steel heat exchanger in each section, no aluminium anywhere in the water circuits!
    7. R

      Custom Firmware Weirdness. Absolutely stumped.

      Thanks both for the advice. It makes good sense. I didn't know the T2 was Sata II, I guess it should be able to auto negotiate with the Sata III drive. Fortunately there was not to much on the new HDD so a reformat was viable. It has worked and time can be shifted again. I guess if it goes...
    8. R

      Custom Firmware Weirdness. Absolutely stumped.

      This is very interesting. I did not realise the SATA might be too fast for the Hummy. On my T2 the Seagate ST2000DMZ08 has been working just fine, except the Time Shift function stopped after we had a mains glitch. The Seagate apparently also uses "shingling" which is a major problem for...
    9. R

      The Dash Away From (Natural) Gas

      Since 1975 I've had an air heat exchanger running 24/7 for domestic ventilation; warm wet smelly air from bathroom and kitchen goes out, transfers useful amount of heat to clean fresh outside air coming in to bedrooms and living room typically at 16C to 18C for much of the year, except hottest...
    10. R

      Hello and thanks from RichFX

      I think I have cured the problems with my particular HDR Fox-T2. Either of two things seemed to be effective, so I have applied both! 1. Additional internal fan I added a spare 40mm fan I had left over from a project, a nice gentle quiet Noctua and took its 12V from the HDD connector via one...
    11. R

      Loss of HD channels

      Hmm, if it was traditional "low loss" then it leaks like a sieve through the screen, potentialy confusing for digital reception. If it was CT100 or "Satellite cable" with the foil 100% screen then it will be OK. I assume the aerial includes a BalUn for a correct match to the coax? I was a...
    12. R

      Hello and thanks from RichFX

      You're right, there is a main board fault, but it seems to be intermittent. I'm doing some soak tests and cool-down rests to attempt to pin it down. The first time it worked properly with the new drive was after I had flexed the board slightly by fitting the SATA lead while it was alive, maybe...
    13. R

      Hello and thanks from RichFX

      I wish to thank BH and several others I've not remembered the names of for the guidance I found here in rescuing my HDR-Fox T2. My problem was the box suddenly went into the cycle of not completing a boot, no warning. It took me a while eliminating possibilities, including tidying up a few iffy...
    1. R

      Start Up Fails When HDD Connected

      That 4.7uF is in a 'Miller' soft-start slow-off circuit (along with the very slightly lossy 100uF electrolytic as a Zobel network) intended to prevent resonant over-volt spikes on the "long" inductive 12V power line to the HDD from damaging eiher the FET or the HDD. Been there done that!
    2. R

      Start Up Fails When HDD Connected

      Those are similar to what I found. My scope is much simpler, an old Picoscope but your pic 2 was what I saw with the old caps, and your pic 1 in the previous post with the new caps. I simply replaced any of the big caps on the PSU card that might have the high switching frequency present. I...
    3. R

      Random switching on of FVP-5000T

      Agreed. Failures can also happen in some rare instances when they are turned Off! In one of my 1980s design prototypes (300 Watt linear lab PSU) the mains transformer primary was failing with a short circuit after just a few weeks. I asked the transformer manufacturer about it and he...
    4. R

      Media mistakes

      Being somewhat OCD I've recorded fuel and mileage etc in a spreadsheet for each car since my CP/M days. It can be a useful pointer to any creeping unreliability, or poorer driving habits.... While I was still commuting I soon became used to rating economy in miles per litre, ten being the target.
    5. R

      Media mistakes

      Acre is 4840 sq yards. It is a bit like remembering a mile is 1760 yards, and a ton is 2240 lbs, it either sticks forever (if old enough to have learned it at junior school) or never. Then a cricket pitch is a chain long, 22 yards, and a furlong is 220 yards or ten chains. These are handy...
    6. R

      The Dash Away From (Natural) Gas

      Make sure it has a stainless steel heat exchanger in each section, no aluminium anywhere in the water circuits!
    7. R

      Custom Firmware Weirdness. Absolutely stumped.

      Thanks both for the advice. It makes good sense. I didn't know the T2 was Sata II, I guess it should be able to auto negotiate with the Sata III drive. Fortunately there was not to much on the new HDD so a reformat was viable. It has worked and time can be shifted again. I guess if it goes...
    8. R

      Custom Firmware Weirdness. Absolutely stumped.

      This is very interesting. I did not realise the SATA might be too fast for the Hummy. On my T2 the Seagate ST2000DMZ08 has been working just fine, except the Time Shift function stopped after we had a mains glitch. The Seagate apparently also uses "shingling" which is a major problem for...
    9. R

      The Dash Away From (Natural) Gas

      Since 1975 I've had an air heat exchanger running 24/7 for domestic ventilation; warm wet smelly air from bathroom and kitchen goes out, transfers useful amount of heat to clean fresh outside air coming in to bedrooms and living room typically at 16C to 18C for much of the year, except hottest...
    10. R

      Hello and thanks from RichFX

      I think I have cured the problems with my particular HDR Fox-T2. Either of two things seemed to be effective, so I have applied both! 1. Additional internal fan I added a spare 40mm fan I had left over from a project, a nice gentle quiet Noctua and took its 12V from the HDD connector via one...
    11. R

      Loss of HD channels

      Hmm, if it was traditional "low loss" then it leaks like a sieve through the screen, potentialy confusing for digital reception. If it was CT100 or "Satellite cable" with the foil 100% screen then it will be OK. I assume the aerial includes a BalUn for a correct match to the coax? I was a...
    12. R

      Hello and thanks from RichFX

      You're right, there is a main board fault, but it seems to be intermittent. I'm doing some soak tests and cool-down rests to attempt to pin it down. The first time it worked properly with the new drive was after I had flexed the board slightly by fitting the SATA lead while it was alive, maybe...
    13. R

      Hello and thanks from RichFX

      I wish to thank BH and several others I've not remembered the names of for the guidance I found here in rescuing my HDR-Fox T2. My problem was the box suddenly went into the cycle of not completing a boot, no warning. It took me a while eliminating possibilities, including tidying up a few iffy...
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