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Post by 2knowtalent on Oct 23, 2007 16:17:08 GMT
Mike, I saw where you opened up a V2 (V1?) to dissapate heat of the tubes... Would you recommend the same for the V3 running the upgrade kit and a Pinkie??? also, do you think ventilation would help lessen the risk of running the Russian 6N1P tubes? What about tube dampers? ...are they bogus like power cables?  Regards, Eric |
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mrarroyo
Been here a while! 
Our man in Miami!
Posts: 1,003
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Post by mrarroyo on Oct 23, 2007 17:49:35 GMT
You sir, have opened a couple of "can of worms". I will not speak for Mike but it appears there is no need to open the case for the stock tubes or 6H23-EB.
I would install heat sinks on the transistors (4) mostly for my peace of mind and to pull any heat away from the board. I use the Herbies Halos brand of dampers, but I will almost bet that most will not believe in them.
Good luck.
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Deleted
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Post by Deleted on Oct 23, 2007 21:10:10 GMT
"I would install heat sinks on the transistors (4) mostly for my peace of mind and to pull any heat away from the board. I use the Herbies Halos brand of dampers, but I will almost bet that most will not believe in them."
Sounds like commonsense to me. I may have a strong preference for solid state, but that doesn't mean that I didn't have many years of experience with valves before that.(at work too) Many valves are microphonic, and IMHO, virtually all of them because of their construction should be improved by any dampening method that didn't result in a higher temperature of the valve .
SandyK
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Post by PinkFloyd on Oct 23, 2007 21:38:35 GMT
The transistors in the v3 don't actually require heatsinking and, talking from experience, you can actually do more damage than good fitting heatsinks in certain cases. Prime example is when you prise the two transistors apart (to sandwich the heatsink in between the two of them) and the movement causes the pads the transistors are soldered to to part company with the adjacent track. If you are going to heatsink then go gently when prising the transistors apart, the pads are extremely fragile and won't take a good beating, they'll lift at the drop of a hat. The v3 doesn't even run "lukewarm" let alone "warm" and the core temperature of the thermo coupled transistors is low enough to negate the need for heatsinks. Live and learn, I have learnt to leave them be.... they are fine as they are |
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Post by 2knowtalent on Oct 23, 2007 21:39:40 GMT
What are your opinions on this...  www.elusivedisc.com/prodinfo.asp?number=MHEATDAMPR(edit: after reading more I understand these to reduce microphony... so snake oil or what???) Mike, do your comments on heat include when running the 6N1P tubes? I'm still not sure if I understand the nature of potential failure(s) caused by the 6N1P tubes... I read about shorts and heat. Is it the heat from the tube leads to shorts (within the tube itself), is it heat emanating from the tube which leads to failure of other components or is it the additional current draw through mechanical pathways that lead to fatigue and failure? |
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Deleted
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Post by Deleted on Oct 23, 2007 22:52:30 GMT
2knowtalent
If you have the spare folding stuff, why not try them, and post your findings here ?
However I have a lot of trouble accepting the attached customer's quote.
" I had no idea how much "noise" and distortion was present prior to the Music Hall EAT dampers."
As far as I am concerned, the heatsinking may very well be beneficial in promoting longer valve life, but audible improvements would be due to further isolation of the valves from sound pressure from the loudspeakers, and cabinet resonances etc. To suggest that they can reduce distortion , smacks of "snake oil salesmanship"
(flame suit on , and zipped up!)
SandyK
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Post by 2knowtalent on Oct 23, 2007 23:07:21 GMT
2knowtalent If you have the spare folding stuff, why not try them, and post your findings here ? However I have a lot of trouble accepting the attached customer's quote. " I had no idea how much "noise" and distortion was present prior to the Music Hall EAT dampers." As far as I am concerned, the heatsinking may very well be beneficial in promoting longer valve life, but audible improvements would be due to further isolation of the valves from sound pressure from the loudspeakers, and cabinet resonances etc. To suggest that they can reduce distortion , smacks of "snake oil salesmanship" (flame suit on , and zipped up!) SandyK Yes, I'm also leary of such comments... I already ordered a set to try out so I'll post once I get some down time |
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