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Post by M57 on Jul 17, 2018 13:24:55 GMT -6
When I look at pictures of peoples racks, it seems everything is racked tightly but I'm pretty sure I've seen 2A's that don't look to be getting much ventilation. I've got space on both sides of my WA-2A. It does have vents and the owner's manual recommends leaving space, but I sure would like to fill it. Come to think of it, most 500 series tube gear doesn't get much ventilation if any. What's up?
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Post by adamjbrass on Jul 17, 2018 13:32:31 GMT -6
One difference here is where the tubes are mounted. The Tubes are hanging off the back of the Teletronix units, while the tubes are mounted on the PCB board inside the Warm. Its always good to leave space, but most people have a hard time affording space. I don't think the Warm gets as "warm" as a vintage unit.
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Post by jcoutu1 on Jul 17, 2018 13:33:22 GMT -6
 A real LA-2A has the tubes open in the back of the unit. |
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Post by adamjbrass on Jul 17, 2018 14:19:33 GMT -6
With Rack and Vent space, is always a compromise. It always depends on the units in question...I have a friend who told me about every ten-twelve years, he has to replace all the PSU capacitors in the units at the top of the rack since they catch and absorb all the heat rising and melt the caps to mush. But he leaves his gear on 24/7, most users here probably do not leave all their gear on in stuffed racks all day and night year'round. If you can afford the space, it's always better for the gear to breathe.
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Post by M57 on Jul 18, 2018 4:54:39 GMT -6
The Dizengoff D4's had no vents at all. That always struck me as a bit strange. Are some tubes more sensitive than others?
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Post by adamjbrass on Jul 18, 2018 5:24:08 GMT -6
The Dizengoff D4's had no vents at all. That always struck me as a bit strange. Are some tubes more sensitive than others? Certainly, all tubes will vary in specs — but there is also a designed “environment” inside each box too. Honestly, the way the Dizengoff fellow designed stuff also struck me as quite odd. |
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ericn
Temp
Balance Engineer
Posts: 15,014 
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Post by ericn on Jul 18, 2018 6:31:01 GMT -6
A real LA-2A has the tubes open in the back of the unit. Keeps them cool and easy to change tubes, the simple design aesthetic of old broadcast gear. |
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Post by EmRR on Jul 18, 2018 7:18:21 GMT -6
Hmm....post disappeared.....I have SS gear that runs hotter than most of my tube gear....like my MOTU 16A. Take a measurement; even my cheapo Radio Shack multimeter has a temperature probe. Learn what the border of 'too hot' is for electronic components, there's usually a rating on the data sheets.
I like open frame rather than enclosed racks for this reason, but you can also add a cooling fan to an enclosed rack to draw air in.
Real LA-2A / etc.....that style comes from an older either/or standard, you see lots of equipment before 1950 that could be rack mounted or table top mounted, put inside a cabinet table top style, etc. Lots of Western Electric gear like that. Allowed for best cooling practices, either way.
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