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Post by ChrisB on Aug 11, 2014 13:44:42 GMT
No x-over on the bass , now where have i seen that before (rofl) It's not a new concept, and it's not an NVA one (which I assume you're alluding to). And, lest I be accused of NVA bashing, you should know that I once told Richard in person that I liked the sound of a system which used a pair of his speakers. |
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Post by danielquinn on Aug 11, 2014 13:53:28 GMT
Nope , i was not alluding to NVA . it as been done by a few - epos , Royd and by me on many occassions and i now wont listen to anything else . NVA were one of two manufactures i could find who currently do it [ other was an american firm with a carbon fibre bass cone ] , but cambridge have just brought out a BMR with no x-over .
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Post by Dave on Aug 13, 2014 16:04:09 GMT
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Post by MartinT on Aug 13, 2014 16:31:36 GMT
Seems an unlikely place to be dissipating power. Nothing underneath getting very hot? Very hard to say more without a circuit diagram.
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Post by Dave on Aug 13, 2014 18:20:31 GMT
Might have it sussed Martin, or at least James (Istari Knight) has sussed it for me:
It's good to know it is nothing serious  |
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Post by MartinT on Aug 13, 2014 19:34:37 GMT
Well spotted, James. When you replace the resistors, Dave, leave them standing proud of the board so that air can circulate underneath them.
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Post by John on Aug 13, 2014 19:40:53 GMT
James knows his onions
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Post by Dave on Aug 13, 2014 21:57:25 GMT
Well spotted, James. When you replace the resistors, Dave, leave them standing proud of the board so that air can circulate underneath them. Indeed Martin, the originals are mounted this way and my intention is to replicate that.
Indeed he does John and he's a lovely chap as well. He's helped me so much over the last year or so for which I am very grateful  |
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Post by brian2957 on Aug 13, 2014 22:11:25 GMT
+1 for James . Mine of information , particularly on Sony amps . |
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Post by Dave on Aug 17, 2014 22:40:32 GMT
I removed the reservoir caps from the Inkel tonight, they are pretty much shagged. Shake them and they'd make great Marakers... 
A pair of these will be replacing them... |
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Post by Dave on Aug 18, 2014 12:51:38 GMT
Not sure whether the third band is red or orange on these resistors:
It has been a very long time since I've had to read a resistor value and frankly I've forgotten how. I need resistance and wattage, can anyone help please? |
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Post by Dave on Aug 18, 2014 14:41:18 GMT
Okay, I have the value now: 4.7Kohm +/- 5% tolerance. The existing resistors are 2 watt apparently but I need to up them to 3w-5w to avoid further discolouration of the board around the legs of the resistors. I've performed a cursory search but 5w versions are proving elusive (may just be my inexperience), any suggestions?
Here's a useful do-dad for calculating resister values for those stuck like me: link
There is also a neat looking app on Goole Play Store for Android smartphones called Resistor Calculator from Anglesey Apps
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Post by jammy on Aug 18, 2014 20:54:31 GMT
MODERATION: Deleted racist post.
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Post by jammy on Aug 18, 2014 21:14:38 GMT
MODERATION: Deleted racist post. Fuk, Couldnt you just have substituted Black for Big. ? |
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Post by pre65 on Aug 18, 2014 21:25:47 GMT
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Post by DaveC on Aug 18, 2014 21:40:16 GMT
The resistors look just fine, changing them isn't going to do a lot ?
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Post by Dave on Aug 21, 2014 13:24:05 GMT
The resistors look just fine, changing them isn't going to do a lot ? The point to changing them is that those already installed are only just coping with the load hence the charring to the board around the legs, which is why I wanted to up them to 5w iterations, although James has assured me that 3w examples would be perfectly adequate. |
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Post by Dave on Aug 21, 2014 13:34:33 GMT
The AV21's are currently on furlough from the near-field system whilst awaiting parts for further mods. My Mission 760i's are standing in for the time being however they may well be staying slightly longer than anticipated. I've been listening quite a lot to the classics recently and to my surprise the Missions do orchestral music exceptionally well. I say 'surprised' because the 760i's aren't exactly large speakers, in fact they are quite wee and yet they can represent the scale of a symphony orchestra with aplomb. They are particularly good at reproducing the brass section which comes over with real 'brassiness' and bite. Superb stuff.
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Post by MartinT on Aug 21, 2014 13:50:26 GMT
The one I learned for colour coding was: Better Be Right Over Your Grid Bias Values for Good Working.
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Post by DaveC on Aug 23, 2014 7:40:22 GMT
The resistors look just fine, changing them isn't going to do a lot ? The point to changing them is that those already installed are only just coping with the load hence the charring to the board around the legs, which is why I wanted to up them to 5w iterations, although James has assured me that 3w examples would be perfectly adequate. A 5W will produce exactly the same amount of heat ! |
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