connieflyer
Headphoneus Supremus
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I think the ember is more solid state which would b why there isnt much diff ymmv
What makes you think this?
I think the ember is more solid state which would b why there isnt much diff ymmv
if you like the 6N6P you may like the 6H30Pi either the sovtec or the electro-harmonix. It has an 800 milliamp heater current but works well with the sunrise II and a little more detail than the 6N6P IMO the sunrise II has a 1 amp heater power supply
Since the 6N6P statement, I have acquired a few different headphones and now I tend to lean toward the 6N23P-EV. The older ones of these are becoming harder to find and I like them so much I have acquired 3.......all Reflector plant which I like better than the Voskhod.
I have checked out the 6N30P-DR on the bay but haven't pulled the trigger on the older Reflector version. Have you compared the vintage version with the Sovtek or Electro Harmonix? I believe that Jeremy indicated that the Sovtek are just the same.
I just got my NOS 6h30 DR for 1977 and am burning it in for a bit, sounds nice, but tomorrow will do a side by side comparison with the new production electro-harmonix 6h30 Pi
Thanks for the comparison. I will pass up the 6N30P-DR for a while.
I may try a couple of E182CC tubes after I make an adapter but I'm not sure. I already have 30 different tubes and I'm beginning to doubt that I will find anything better than I already have.
22nd March 2006, 12:01 AM | #9 |
Johan Potgieter diyAudio Member Join Date: May 2005 Location: Pretoria, South Africa | I have used the E182CC a number of times in driver duty, and would like to contribute the following: The E182CC has a higher plate dissipation than most, at 4,5W each triode and 8W for both. Otherwise it is difficult to choose between it and e.g. an ECC88; both are similar with the ECC88 having the slightly higher mu. The E182CC has a slightly higher Vmax at 600V, but a disadvantage is that I found that the 2 triodes can differ up to 30% in conductance, though infrequently. (One must remember that as a computer tube, being either on or off most of the time, equal mu's are not important.) My application needed a driver for a Quad-type distributed load output stage (100W), where 350Vpp of signal was required into a 33K load resistor. I use them at 500V Vao, no-signal Ip=8mA, and plate voltage of 230V. Regarding use as a pre-amp tube I would not use it simply because there are more suitable types (smaller, cooler, lower microphonics, etc.). I think it is in a comparative sense that it is not "recommended" for pre-amp work; as said, the anode-grid capacitance is severe (3,4 - 4,6pF compared to ECC88 and others of 1,2 - 1,6pF). It is slightly microphonic, again not a prime requirement regarding its intended application. Apart from the hint in the previous post, "special quality" mostly means guaranteed life for this kind of tube, not rigidity, low microphonics etc. not required in its main field of use. (Those requirements would be mandatory in special quality audio tubes, e.g.) For my application I find it quite satisfactory. With due respect to MJ, the "sound" of a tube is so related to other factors, apart from the subjectivity of hearing, that I am always a little sceptical as to such reports. I hope this helps, beamnet. Regards. |
Thanks for the comparison. I will pass up the 6N30P-DR for a while.
I may try a couple of E182CC tubes after I make an adapter but I'm not sure. I already have 30 different tubes and I'm beginning to doubt that I will find anything better than I already have.
I am contemplating purchase of the Ember but question: on Garage17 website, under Project Ember user manual - operation guide - it says there may be 'some channel imbalance below 9 o'clock on the volume this is normal & solution seems to be to adjust the source output level so can use with volume setting of 9 o'clock or greater'. First, how do you adjust the source volume when you are using RCA line out from a CD player?? Also, it has been my experience with portable amplifers that slight increases in volume can be more than my ears can take. I suspect that it depends on the gain jumpers and whether you are using low or high impedance headphones. In a previous comment on this thread, Rabbit said he was using the Horizon (not Ember) with Beyer DT990 and his volume level was at 8 o'clock. Thanks to anyone for info, I like to listen at relatively low volume levels but channel imbalance would be a problem. |
solderdude Administrator NO nonsense electronics Posts: 1,288 | Project Ember Jun 11, 2013 at 2:04am Quote Post by solderdude on Jun 11, 2013 at 2:04amThe reason for the possible imbalance (not all potmeters are created equal) is the physical size of the potmeter.With small potmeters the tracking (difference between L and R channel) is bound to differ a bit. When using a CDP you cannot adjust the output voltage but the gain of the amplifier can be altered by the jumpers. If the gain is still too high AND you are always listening at the potmeter below 9 o'clock AND your potmeter has a noticeable imbalance you can always lower the gain of the amp even further by: a: changing the value of a resistor b: choosing a tube with lower gain Portable amplifiers, more often than not, have linear volume controls as they are more or less intended as 'gain control' instead of volume control. In these cases the potmeter reacts a lot from 0 to 30% setting and very little between 50% and 100% The potmeter in Ember (etc) are log type and do not have this behavior. The horizon didn't have the gain setting and because the gain of tubes that have no feedback is rather high we added the gain jumper. Before ordering you can contact Jeremy and ask him to select the best possible potmeter (I know he tests each potmeter individually!) and lower the gain of the amp even further by changing the resistors. Jeremy knows where to find me to get the proper values. |