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DBSTalk First Look: DIRECTV HR21-100 High Definition DVR


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96 replies to this topic

#51 OFFLINE   Mike Bertelson

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Posted 29 February 2008 - 08:19 AM

My guess is that it's both air flow management and to reduce vibrations. Does the foam touch the cover when it's attached?


It fits exactly between the drive and cover and it is an interference fit.

I do find it a bit puzzling as the hard drive is the biggest heat generator in the box. Normally the last thing you'd want is to put an insulating material against the largest radiating surface of the drive.


That's why I thought it must have something to do with sound attenuation.

Definitely an interesting quandary...:grin:

Mike

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Since it costs 1.66¢ to produce a penny, my 2¢ worth is really 3.32¢ worth.  That 3.32¢ is my own and not the 3.32¢ of DIRECTV, Dish, or anyone else for that matter.


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#52 OFFLINE   Stuart Sweet

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Posted 29 February 2008 - 08:47 AM

I can tell you it wouldn't likely be memory foam, as memory foam is a lot denser and probably would impede heat dissipation.
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#53 OFFLINE   BlackRabbit

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Posted 29 February 2008 - 10:08 AM

I'm curious what brand/type/speed of memory this device has. I couldn't zoom into the picture enough to get a clear view. Are the original pictures high enough resolution to make out a part number? I believe the memory is the row of 4 chips just to the left of the processor.

#54 OFFLINE   jheda

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Posted 29 February 2008 - 10:14 AM

Great job boys!!! Iam impressed!!!!!!!!!!!

JHEDA

we miss you EARL

[SIZE="2"]Hr-24
Hr21-700 
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Samsung DVD player via hdmi..r10 in playroom:)


#55 OFFLINE   Mike Bertelson

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Posted 29 February 2008 - 10:25 AM

I can tell you it wouldn't likely be memory foam, as memory foam is a lot denser and probably would impede heat dissipation.


Truthfully I don't have any idea what it really is. :shrug:

Here's a little speculation not necessarily based in fact...:scratchin

I have a sample of memory foam I got at a home show. It is identical in feel, weight/density, and color to the foam in the HR21.

Memory foam has a very weird feel to it. The surface has a kind of oily/sticky feel to it. It is because of the similarities that I think it might be memory foam.

Heat has always been a problem with memory foam. There are some composites and re-formulations that are supposed to be better at dissipating heat. Regardless of composition, the one in the HR21 certainly denser/heavier that the standard foam pad. Not that it matters. Any foam pad will provide thermal insulation. However, the fan is right up against the drive and will easily control the temp in the drive.

It's just an incrediblely weird place for any kind of foam pad. It can only have a limited number of functions...insulation, air flow, sound, or vibration. IMHO it can only be for noise or vibration with an outside chance of air flow control.

It's a theory. :grin:

Mike

µß
Since it costs 1.66¢ to produce a penny, my 2¢ worth is really 3.32¢ worth.  That 3.32¢ is my own and not the 3.32¢ of DIRECTV, Dish, or anyone else for that matter.


#56 OFFLINE   waynebtx

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Posted 29 February 2008 - 10:52 AM

I'm curious what brand/type/speed of memory this device has. I couldn't zoom into the picture enough to get a clear view. Are the original pictures high enough resolution to make out a part number? I believe the memory is the row of 4 chips just to the left of the processor.


Found this in some of our pics hope this helps.

Attached Thumbnails

  • Interior%201.JPG

Wayne

Slimline dish SWIM16
Sharp LC-60E78UN
HR34-700/AM21 w/ Harmony 880.
1 C31-700

HR44-700

HR24-100

H25-100

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Xbox 360

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retired USN , retired Boeing, retired L3COM, just plain tired


#57 OFFLINE   Mike Bertelson

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Posted 29 February 2008 - 10:56 AM

I'm curious what brand/type/speed of memory this device has. I couldn't zoom into the picture enough to get a clear view. Are the original pictures high enough resolution to make out a part number? I believe the memory is the row of 4 chips just to the left of the processor.


Here you go and welcome to the forum...:welcome_s

ram.JPG

HY5DU121622CTP-D43

512MB edit:corrected to amount of memory

Mike

edit: ya beat me to it wayne:)

µß
Since it costs 1.66¢ to produce a penny, my 2¢ worth is really 3.32¢ worth.  That 3.32¢ is my own and not the 3.32¢ of DIRECTV, Dish, or anyone else for that matter.


#58 OFFLINE   BlackRabbit

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Posted 29 February 2008 - 11:29 AM

Thanks guys! That was fast.
Strange though, the parts look to be EOL. That can't be when this is a new device. Also, these are 512Mb, which means 4 of them totals 256MB. Maybe there's more on the other side.

Thanks for the warm welcome.

#59 OFFLINE   Thaedron

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Posted 29 February 2008 - 12:09 PM

Kudos to AirRocker and GulfWarVet on excellent job of packaging the final review!
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#60 OFFLINE   dtrell

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Posted 29 February 2008 - 12:11 PM

again the latest write up shows its "cooler" than its "brothers" by running between 105 and 115 degrees....my HR21-700 has NEVER been over 115 degrees and is usually around 110...and i have a time warner sa8300hd box sitting on top of it...so again, how this new one runs any cooler is beyond me when the internal temps are the same. the fan in my unit is also whisper quiet, quieter than the sa8300.

#61 OFFLINE   Mike Bertelson

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Posted 29 February 2008 - 12:17 PM

Thanks guys! That was fast.
Strange though, the parts look to be EOL. That can't be when this is a new device. Also, these are 512Mb, which means 4 of them totals 256MB. Maybe there's more on the other side.

Thanks for the warm welcome.


You are correct in that it isn't 2GB, however it is 512MB.

Mike

µß
Since it costs 1.66¢ to produce a penny, my 2¢ worth is really 3.32¢ worth.  That 3.32¢ is my own and not the 3.32¢ of DIRECTV, Dish, or anyone else for that matter.


#62 OFFLINE   tekie99

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Posted 29 February 2008 - 12:31 PM

Bravo, excellent write up.

Intput/Source Equipment
(1) DirecTV HR44-500 HD DVR
(1) DirecTV HR24-500 HD DVR
(1) DirecTV C41 Client


Output Display Equipment
70" Vizio 4K LED P702UI-B3 
[HR44]

55" LG LED [HR24]
32" Vizio LCD [C41]

 


#63 OFFLINE   sbl

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Posted 29 February 2008 - 12:46 PM

It would be interesting to know if the top surface of the foam gets noticeably warm after a period of operation. It could be that this foam is actually a heat transference medium to use the case cover as a radiator. The comments about it feeling like memory foam, which absorbs heat, make me wonder. Interesting design choice. I'm sure the engineers had a good reason for it.

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#64 OFFLINE   hdtvfan0001

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Posted 29 February 2008 - 02:05 PM

It would be interesting to know if the top surface of the foam gets noticeably warm after a period of operation. It could be that this foam is actually a heat transference medium to use the case cover as a radiator. The comments about it feeling like memory foam, which absorbs heat, make me wonder. Interesting design choice. I'm sure the engineers had a good reason for it.

I suspect the purpose of the foam pad is for vibration and some noise reduction (only).

The hard drives in the -700 and -200 models are each mounted differently a bit, and use different methods to accomplish the same things.
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#65 OFFLINE   Mike Bertelson

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Posted 29 February 2008 - 02:10 PM

It would be interesting to know if the top surface of the foam gets noticeably warm after a period of operation. It could be that this foam is actually a heat transference medium to use the case cover as a radiator. The comments about it feeling like memory foam, which absorbs heat, make me wonder. Interesting design choice. I'm sure the engineers had a good reason for it.


I can tell you that it doesn't. At least not with the thermometer on my multimeter(uncalibrated).

There was a variance in temp over the top surface. I don't remember what the values were but there was nothing different about where the foam is.

I'll try it again and this time write down the numbers.

Mike

µß
Since it costs 1.66¢ to produce a penny, my 2¢ worth is really 3.32¢ worth.  That 3.32¢ is my own and not the 3.32¢ of DIRECTV, Dish, or anyone else for that matter.


#66 OFFLINE   Doug Brott

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Posted 29 February 2008 - 03:05 PM

I installed one of these last week. No problems so far. Looks just like
my HR21-700. Very nice job on the write-up.


Hmm .. Any chance you can pass along the version information? Just press & hold the {INFO} button.
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#67 OFFLINE   pacjag

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Posted 29 February 2008 - 04:07 PM

Hmm .. Any chance you can pass along the version information? Just press & hold the {INFO} button.


It installed 0x1fe within an hour of booting up.

#68 OFFLINE   mikhu

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Posted 29 February 2008 - 04:55 PM

I looked at my pictures again and between them and my memory, as feeble as it may be, I think it's just regular old closed cell foam. Attached is a crop from a high resolution pic I took.

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  • Copy of DVR 010.jpg


#69 OFFLINE   Doug Brott

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Posted 29 February 2008 - 07:07 PM

It installed 0x1fe within an hour of booting up.


Really? Are you sure that it's an HR21-100 and not perhaps some other model? It should be printed just behind the access door on the lower right front of the reciever.
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#70 OFFLINE   sbl

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Posted 29 February 2008 - 07:29 PM

I looked at my pictures again and between them and my memory, as feeble as it may be, I think it's just regular old closed cell foam.

Judging from the picture, I'd agree.

Steve

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#71 OFFLINE   johnp37

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Posted 29 February 2008 - 10:51 PM

Fine job as usual gentlemen.

#72 OFFLINE   Rich

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Posted 01 March 2008 - 10:48 AM

My HR21-700, which has no foam, is silent as well.


As is mine. I do have one 20-700 that I have to tap the area over the HD to silence the vibration every once in a while. Having had no luck at all with the 20-100s, I will not intentionally add one of these to my system.

If I remember correctly, the 100 is a designation for Phillips and after my latest adventure with a Phillips plasma TV want nothing to do with Phillips and their products. That's just an opinion, not written in stone, but how many different products from the same manufacturer can you have problems with before it dawns on you that they fail to meet the same criteria as other manufacturers do. I have the same opinion of Samsung products. I gotta admit I had the same opinion of Panasonic products until I bought a Panny plasma. That really changed my mind about Panasonic products. I now have four Panny plasmas.

Oh, best first look yet, great job!

Rich

#73 OFFLINE   pacjag

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Posted 01 March 2008 - 11:42 AM

Really? Are you sure that it's an HR21-100 and not perhaps some other model? It should be printed just behind the access door on the lower right front of the reciever.


You know, you are correct. I'm sure the installer that delivered it told me it was
a -100 and I don't think I ever actually looked at the box. It turns out it is a -200.
Sorry about any confusion. I'm an idiot. :goofygrin

#74 OFFLINE   Malibu13

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Posted 01 March 2008 - 12:24 PM

If I remember correctly, the 100 is a designation for Phillips
Rich



I believe the HR21-100 is manufactured by RCA (Thomson) and not Phillips. :)

-Donnie-


#75 OFFLINE   Jeremy W

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Posted 01 March 2008 - 12:41 PM

I believe the HR21-100 is manufactured by RCA (Thomson) and not Phillips. :)

You are correct.




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