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Post by Deleted on Feb 19, 2015 7:44:49 GMT
Wow! That second one looks damn sexy!
Did I say that?
Edit - I presume I'd need the Supercharger and the adapter for either of those valves?
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Post by musicman on Feb 19, 2015 15:12:53 GMT
adapter for sure, supercharger you would have to check with Jeremy or Frans. Thought they would look really neat sitting all proud and all!
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Post by Deleted on Feb 19, 2015 16:36:28 GMT
The price of those valves is frightening though eh? I'm slowly bringing my wife around to the idea of buying me an amp for my birthday but I'd be pushing it to ask for a £60 piece of glass too. Still, I bet they look good in the dark  . And if there's an increase in sound quality then that's all the better. I had planned a Spring upgrade on the car ICE though but I'm using the car less & less these days so I could always postpone that for the summer time. Rumour has it there's a new Alpine sub coming out in the not too distant future & I'd like to reduce my subs from two to one so I could sell both of my exist... yada, yada, yada |
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Post by ronzo56 on Feb 20, 2015 2:18:11 GMT
The price of those valves is frightening though eh? I'm slowly bringing my wife around to the idea of buying me an amp for my birthday but I'd be pushing it to ask for a £60 piece of glass too. Still, I bet they look good in the dark . And if there's an increase in sound quality then that's all the better. I had planned a Spring upgrade on the car ICE though but I'm using the car less & less these days so I could always postpone that for the summer time. Rumour has it there's a new Alpine sub coming out in the not too distant future & I'd like to reduce my subs from two to one so I could sell both of my exist... yada, yada, yada Yeah the Psvane tubes are some of the most expensive I've seen. Some types go for $2000 a pair. I'm using the re-issue Tung-Sol 6NS7's, and they seem as good as my NOS Sylvania and GE valves or very close IMHO. Plus they are only £13 to £16 ; over here at least. Well not pounds of course.  Some would disagree because they don't think any re-issues can sound good, but I have to wonder if they have heard all of them. Some may be inferior, but I find that this particular one is very well done. Oh, by the way, they don't glow that much, except in a totally dark room. I'm almost positive that the Supercharger is not needed for the 6NS7 adaptor. |
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Post by Deleted on Feb 20, 2015 9:38:11 GMT
The supercharger is for 12V valves as far as I can tell. The 6SN7 is 6V so wouldn't need the supercharger. Only the adapter would be necessary. It's a shame they don't light up though.
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solderdude
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Post by solderdude on Feb 20, 2015 11:10:50 GMT
Without supercharger the Ember (and Horizon) can only provide up to 600mA heater currents (when in 6.3V mode)
With supercharger the Ember (and Horizon) can supply at least double the heater currents so >1A.
Most tubes are well below 600mA so only very few tubes would need the supercharger.
The 6SN7 is 600mA but can be used without the supercharger.
Some of the 'fast heater' tubes (the ones that light up bright on startup only) draw > 600mA and once warmed up drop below 500mA but still need the supercharger because of the high starting current which causes the voltage supply to shut down on start-up.
When this happens you will see the tube LED go on-off-on-off etc.
Some of these tubes will heat enough and work O.K. after a few 'cycles' other tubes may never work on the stock heater power supply.
Also in that case the Supercharger helps and these difficult tubes will work 'normally'
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Post by richard51 on Feb 20, 2015 13:52:01 GMT
"I will again caution everyone that various 6SN7 types have different voltage and plate dissipation ratings. The voltage rating refers to voltage across the tube's plate and cathode. To ensure good tube reliability you should probably run a tube at 70% or less of its maximum plate dissipation.
5692 - 275 Volts maximum & maximum 1.75 Watts per section
6SN7GT/WGT -- 300 Volts maximum & maximum 3.5 Watts per section
6SN7GTA/GTB - 450 Volts maximum & maximum 5.0 Watts per section
Using the general audio application of 250 plate volts, a bias of 8 volts results in 9ma of current and a plate dissipation of 2.25 Watts, we find:
5692 - runs 43 % over maximum rating – It isn’t a 10,000 hour tube when you run it this HOT!
6SN7GT - runs 64% of maximum – coasting and liking it
6SN7GTA/GTB - runs 45% of maximum – Hardly turned on, may outlast you."
I am curious to know what are the dissipation rate of the Ember with The 6ns7 tube ?
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Post by ronzo56 on Feb 20, 2015 15:33:51 GMT
I'm curious as well as the Tung-Sol I'm using is a GTB type, and I might have to list it in my will. |
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solderdude
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Post by solderdude on Feb 20, 2015 16:32:18 GMT
Those tubes aren't run here as in the example where they need to deliver power.
In these amps the currents are extremely low and the voltages around 24V (for Ember) so the tubes are dissipating mW instead of several watts so they are run <1% !
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Post by musicman on Feb 20, 2015 16:54:38 GMT
Do you know what other tubes can be run on the Ember with the adapter, besides the 6SN7? Curiosity will kill whats left of my wallet!
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solderdude
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Post by solderdude on Feb 20, 2015 18:47:40 GMT
AFAIK there aren't that many dual triodes in an octal base.
33S29B, 5691, 6113, 6188, 6n9, 6SU7, ECC35, VT229, 6SL7, CV1988, CV278, E1606, VT-231, 6Н8М, E1606, OSW3129, 6Н8С, 5692, 6n8s, B65, CV1986, CV569
Perhaps some of these could be used (can't guarantee it, ask before buying somewhere)
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Post by musicman on Feb 20, 2015 20:50:54 GMT
thanks for the info, will check before buying any other tubes.
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Post by richard51 on Feb 21, 2015 0:15:49 GMT
Those tubes aren't run here as in the example where they need to deliver power. In these amps the currents are extremely low and the voltages around 24V (for Ember) so the tubes are dissipating mW instead of several watts so they are run <1% ! How does this affect the durability of the tube ? is the tube durability better if the diddipating factor is in mw? |
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Post by ronzo56 on Feb 21, 2015 0:20:48 GMT
I 'm pretty sure it does, as a lot of the power dissipation in a tube is In the form of heat, like a light bulb. Lower heat longer life.
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Post by Deleted on Feb 22, 2015 23:24:09 GMT
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. And if there's an increase in sound quality then that's all the better.
Some would disagree because they don't think any re-issues can sound good, but I have to wonder if they have heard all of them. Some may be inferior, but I find that this particular one is very well done. Oh, by the way, they don't glow that much, except in a totally dark room. 
