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The Sony DCR-TRV900 was a DV tape camcorder released by Sony in 1998, with an MSRP of USD $2699. It was intended as a high-end consumer camera, more portable and less expensive than the top-of-the-line DCR-VX1000. It became one of several Sony and Canon models popular in late-'90s desktop video production, delivering quality comparable to then-dominant analog Betacam hardware at a fraction of the cost. In 2002, Sony replaced the TRV900 with the somewhat less well-received DCR-TRV950.
The camcorder had three 1/4-inch CCDs, which provided an exceptionally high-quality video image for a handheld camcorder of the period. It also had a 3.5-inch LCD screen, a color viewfinder, a 12x optical zoom, a 48x digital zoom, and a manual focus ring. (Often overlooked in consumer camcorders, this feature allows you to focus using a mechanical ring around the lens, offering precise control.) The camcorder included a FireWire port for transferring video to a computer.
At the time, Sony had a pattern of releasing "professional" upgraded versions of their most popular consumer cameras, with the same chassis shape but made from more durable materials and in a darker color. Extra features included XLR inputs and the ability to record in the higher-grade DVCAM format. The TRV900's pro equivalent was the DSR-PD100, released in 2000; the TRV950's was the DSR-PDX10.

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  1. Best

    TRVs - their Purpose and Function

    Sorry if this appears to be a simplistic question, but not as easy to answer perhaps as we think. It is to settle an argument. As the title says, - what are TRVs supposed to do in all respects and what way do they operate?
  2. S

    Danfoss trvs hard to balance rads

    Hi, I put a new central heating system in my property 3 years ago and used danfoss trvs. I have never managed to successfully balance the radiators using these trvs and wondering now if I've fitted them properly. It's a fine line from hot to warm eg each trv has 5 heat settings but heat setting...
  3. cloudsix

    TRVs. Do I need an automatic bypass?

    I want to fit some TRVs throughout the house. Do I need an automatic bypass installed if I don't have a TRV on every radiator? I won‘t have one in the hallway, kitchen, and upstairs ensuite. Further to that, if I do need one, do any boilers come with them pre-installed? I have a Worcester...
  4. F

    New Boiler and TRVs but gas filling rad 7 months on

    You amazing bunch were able to help me out greatly a few months ago and I’m hoping you will be able to do the same this time around. 7 months ago we had a new boiler fitted and had TRVs added to 3 out of 4 rads (we decided against the kitchen one closest to the boiler as we will be remodelling...
  5. cr0ft

    Best Way To Unstuck TRVs

    So as I'm going to be doing over a hundred of these next week, I was wondering what you guys think is the best way to do this. Not looking for a short term fix, really after what works well longer term. Replacing them all isn't really an option that's desirable if it can be avoided as it's on...
  6. H

    Changing TRVs on a 10mm Microbore System

    Hi. I need to change a few TRVs on my radiators. Its a 10mm Microbore system. I'd like to be able to undo the nuts, take off the old one and fit the new one with the same nuts, in order to save time. Here is a photo of an old one. It looks like there is a reducer piece under the TRV rather...
  7. G

    How can I replace 1/2" TRVs with existing 3/4" tails

    Hi I am a homeowner/DIYer albeit reasonably confident, so I may not be using right terminology etc, but here goes: I wonder if you can help! I want to replace my rad valves to the TRV type and locksheild, but I have a problem. The tails currently on my rads are the larger type (3/4")! the...
  8. M

    Trvs on single pipework ch system - yes or no?

    I have a house where the pipework is all single pipework loop with t's off through the rads and back into the same pipework. The problem is temp control and water flow through the rads. There are some TRVS installed on some of the rads. The problem is the rads arent getting hot enough. The...
  9. I

    Fitting TRVs with New SPlan system

    Hi All Im not a plumber. Im a good DIYer and like doing it myself. Im working on a closed system. Im installing an SPlan layout with motorised valves and also TRVs on rads. Im installing a room stat and cylinder stat. I have a two channel programmer. 1. The existing setup has no...
  10. M

    trvs on heated towel rack

    so whats the deal with this. im rather unfamiliar with central heating systems coming from australia. but read on a forum here that theres a general dislike for trvs on a heated towel rack. why is this is it just cause its redundant or simply unnecessary and a lockshield will suffice ... in...
  11. Hobo128

    Room thermostat and trvs

    I have moved a boiler in a property and the have open planned the kitchen living room and have 3 tall radiators in the room in each corner. The rads have trvs. If I put the room stat in this room do I need to take off the trvs and replace them with lock she ads or do I only need to do one of the...
  12. T

    Some advice on TRVs and wall stats please

    In need of a bit of advice if possible? Recently moved house and just trying to get to grips with the heating system before it gets cold enough to actually need it! All rads bar one have a TRV. A couple seem to be stuck in the MAX position but I'm hoping a bit of WD40 will sort that...
  13. S

    Two rads + room thermostat - omit TRVs on one, or both?

    Hi Guys - just a quickie! I'm aware that a TRV shouldn't be fitted to a rad in a thermostat-controlled room, but does that apply to all rads, when more than one is fitted in the room - regardless of how they may be proportioned? Cheers
  14. R

    Trvs on rads in the same room

    Can someone confirm please I'm correct in thinking if you have 2no rads in the same room you only put a trv on one of the rads? If so what's the science behind this and is it also a building reg recommendation ?
    • Rubicon
    • Thread
    • against along cold radiator hot rads other there's thermostatic trvs
    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board
  15. D

    What are the consequences of unidirectional TRVs fitted to outlet not inlet?

    I have just had a new combi boiler (Worcester 36 CDi Compact) fitted as a replacement for my trusty Worcester 350 Combi. The system was powerflushed as well (with a Magnacleanse filter on the machine, though it didn't take as long as I'd have expected: about 3 hours for a 13-rad system). A...
  16. P

    Banging TRVs.

    Some of my TRVs make a banging noise. I have a pumpedsystem, with 3 port valve and 2 loft tanks. The valves are all flowing in thecorrect direction with the arrows on valve body – the valves are on the flowpipes into rads. Should I try replacing the valves? If not, would it be agood idea to try...
  17. B

    3/4 to 15 mm trvs wanted

    Anyone got any all prices am seeing are silly doesn't matter if heads don't match cheers
  18. H

    Advice on installing a house thermostat with radiator TRVs

    Hi, I have moved to a new home that has central heating via a boiler (and Megaflow storage tank). There is no thermostat in the house and all the radiators do not have TRVs- just old valves. I received a quote for installing a house thermostat and radiator TRVs in all rooms, and bathrooms, but...
  19. 3

    BG Potterton Precision - Radiator removal to decorate & TRVs?

    Morning folks, we have recently moved into our new house and it has a 12 month old British Gas Potterton Precision system installed. We are decorating and want to be able to remove the radiators but I can't see where the central heating / hot water system is refilled or a pressure gauge of...
  20. T

    Recommendations for TRVs

    Hello all, I'm just a householder getting a couple of quotes for a new CH install and am looking at which TRVs to specify, seeing as the guys I've had quote me so far so just use cheap no-name TRVs, but are happy to price for and fit any I may choose. I'm looking for a decent brand that shuts...
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