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2359glenn | studio - Page 266

post #3976 of 11725
Quote:
Originally Posted by rosgr63 View Post
Clayton, don't........check the VT-52 version first!!!!!!

There's more than one version?

post #3977 of 11725
Quote:
Originally Posted by rosgr63 View Post


 

Think Raytheon #45's Box Plates..........

 

 

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You just had to post this picture Mister!  I do believe this is THE 45 Globe to have, and is the only NOS 45 tube I really covet at this point.  Being so incredibly rare and expensive I doubt I will ever have the chance.  It's probably for the best, if I got a pair I wouldn't be able to convince myself to actually use them anyway.

 

I keep reading all over the place that the EML 45 is truly the best sounding 45 tube you can get.  Some of the EML stuff is overhyped I think but I see widespread agreement that their 45 tube is better than any NOS tube.  So, next year I will probably grab myself a pair and not pursue NOS tubes anymore.

post #3978 of 11725

Yea but the EML is not as pretty and won't last as long.

Probably cost the same.
 

post #3979 of 11725
Quote:
Originally Posted by Xcalibur255 View Post

You just had to post this picture Mister!  I do believe this is THE 45 Globe to have, and is the only NOS 45 tube I really covet at this point.  Being so incredibly rare and expensive I doubt I will ever have the chance.  It's probably for the best, if I got a pair I wouldn't be able to convince myself to actually use them anyway.

 

I keep reading all over the place that the EML 45 is truly the best sounding 45 tube you can get.  Some of the EML stuff is overhyped I think but I see widespread agreement that their 45 tube is better than any NOS tube.  So, next year I will probably grab myself a pair and not pursue NOS tubes anymore.


I'm new to the 2A3 and 300B tubes. These tubes seem similar in that they look the same but are obviously not the same nor are they interchangeable. Can anyone tell me why they would prefer one over the other? The 6B4 is new to me. An octal, yes?

post #3980 of 11725

I am thinking 2A3 is great, also for availability too. Not big fan of 300B

post #3981 of 11725

I missed the party here, what C3g (6.3v), C3o (6.3v), and C3m (20v) sound like compare to, let's say other 9-pin tubes?

post #3982 of 11725

Clayton, you are becoming a tube addict............that's too bad.

 

Xcalibur, I bet many people haven't tried the nice globe #45's and compare the EML to the ST bottles.

 

There is also a ST bottle version of the Raytheon box plates and a different globe Raytheon with box plates for reference I'll post pictures here:

 

http://www.head-fi.org/t/477288/dht-addicts

 

SO sorry for this........


Edited by rosgr63 - 8/2/13 at 12:37pm
post #3983 of 11725
Quote:
Originally Posted by rosgr63 View Post
Clayton, you are becoming a tube addict............that's too bad.

Whew. Oh, thank goodness. I thought I was just an amp addict.

post #3984 of 11725

Clayton you have a bad influence on me, please show restraint!

 

The 6A3 is a 2A3 with a 6.3 heater voltage, easier to build an amp for it as it draws 1A compared to 2.5A of the 2A3.

 

Glenn the VT-52 are very unique as they were designed to run at either 6.3V or 7V.

Used in aircraft radios, they run at idle speed when the aircraft was on the apron at 6.3V and then at full/flying speed at 7V.

post #3985 of 11725

I can make the amp have a switch 2.5 - 6.3 then have a pot to adjust 6 to 7 volt.

This way you can here the sound at 6.3 - 7 and in between and see what sounds best.

I can make some crazy good amplifiers if the person wants to spend the money

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

i

post #3986 of 11725
Quote:
Originally Posted by Seamaster View Post

I missed the party here, what C3g (6.3v), C3o (6.3v), and C3m (20v) sound like compare to, let's say other 9-pin tubes?


Hello It is good to here from you again!

And it was nice to see the pix of your children enjoy them while they are little mine are 23 and 25 now.

 

I don't think there is any 9 pin tube that is in the same league as the C3 tubes.  They are Loctal tubes.

Not only do these tubes sound great they can drive the miller capacitance of a 300b a 6SN7 cannot drive a 300B properly.

I know that I am going to regret saying that.  You said you don't like the sound of a 300B driven by what??

There are only a couple of high end amp company's me and a few DIY people using this beauty of a tube

so they are still cheep and available.

post #3987 of 11725
Quote:
Originally Posted by Clayton SF View Post


I'm new to the 2A3 and 300B tubes. These tubes seem similar in that they look the same but are obviously not the same nor are they interchangeable. Can anyone tell me why they would prefer one over the other? The 6B4 is new to me. An octal, yes?


Clayton the 300B and 2A3 have no direct relationship other than they are both directly heated triodes.  The 2A3 is a really old tube it started out being basically two 45s stuffed together into the same glass this was the initial solution when people were wanting more power than the 45 could deliver.  Back in those days there were not many types of tubes in existence yet the 45 was used very widely in radios and in the very first movie theaters that had sound.  Once they started going indirectly heated the types of tubes started to explode.

 

Western Electric designed the 300B for pretty much the exact purpose that it is still being used for today interestingly enough.  The 2A3 I believe was invented by RCA and the original monoplate 2A3s are the most coveted tube of that type.  I'm not sure who invented the 45 I know it evolved from one of the very first radio tubes ever invented and is itself one of the oldest radio tubes in existence.  The generalization is that the 2A3 and the 45 sound the same but I've read a lot of talk that disagrees with this particularly in terms of tonal balance.  The 45 is known for transparency and extremely good imaging where as the 2A3 is a bit more spotlighty with richer tone colors.  It is a fact that the 2A3 has higher distortion than the 45 though, this part of it is readily proven by measurements.

 

Just to clarify what Stavros said, we technically have 2A3, 6A3 and 6B4G.  2A3 = 2.5V UX4 4-pin base.  6A3 = 6.3V UX4 4-pin base.  6B4G = 6.3V 8-pin octal base.  I have heard the 6B4G myself they are really nice sounding tubes.  How they compare to the 300B I cannot say since I don't know any 300B gear.   Yet.  Hopefully this fall.


Edited by Xcalibur255 - 8/2/13 at 4:24pm
post #3988 of 11725
Quote:
Originally Posted by Xcalibur255 View Post


The 2A3 is a really old tube it started out being basically two 45s stuffed together into the same glass 

Mmmmm, like a double burger.

post #3989 of 11725
Quote:
Originally Posted by Xcalibur255 View Post


Clayton the 300B and 2A3 have no direct relationship other than they are both directly heated triodes.  The 2A3 is a really old tube it started out being basically two 45s stuffed together into the same glass this was the initial solution when people were wanting more power than the 45 could deliver.  Back in those days there were not many types of tubes in existence yet the 45 was used very widely in radios and in the very first movie theaters that had sound.  Once they started going indirectly heated the types of tubes started to explode.

 

Western Electric designed the 300B for pretty much the exact purpose that it is still being used for today interestingly enough.  The 2A3 I believe was invented by RCA and the original monoplate 2A3s are the most coveted tube of that type.  I'm not sure who invented the 45 I know it evolved from one of the very first radio tubes ever invented and is itself one of the oldest radio tubes in existence.  The generalization is that the 2A3 and the 45 sound the same but I've read a lot of talk that disagrees with this particularly in terms of tonal balance.  The 45 is known for transparency and extremely good imaging where as the 2A3 is a bit more spotlighty with richer tone colors.  It is a fact that the 2A3 has higher distortion than the 45 though, this part of it is readily proven by measurements.

 

Just to clarify what Stavros said, we technically have 2A3, 6A3 and 6B4G.  2A3 = 2.5V UX4 4-pin base.  6A3 = 6.3V UX4 4-pin base.  6B4G = 6.3V 8-pin octal base.  I have heard the 6B4G myself they are really nice sounding tubes.  How they compare to the 300B I cannot say since I don't know any 300B gear.   Yet.  Hopefully this fall.

Xcalibur255. Very informative. Thank you for that walk through tube history. I am completely fascinated by its evolution but even more fascinated by the ones that have never changed that we still use today!

 

Quote:
Originally Posted by Eee Pee View Post
Mmmmm, like a double burger.

FOOD!


Edited by Clayton SF - 8/2/13 at 4:40pm
post #3990 of 11725

I think the 2A3 is still the most popular and "standard" version of the tube, the other variants were attempts to adapt the tube to slightly different roles over the years.  All of the new production 2A3 tubes adhere to the original design calling for a 2.5V heater and UX-4 base.

 

The DHT amp Glenn is making right now is capable of running either the 45 or the 2A3 so I will be able to compare them.  Might not be a very fair comparison though since I have a few nice NOS 45s but I really have no immediate plans to buy any NOS 2A3s.  The fact that they are absurdly expensive has something to do with it.  I was going to grab some Psvane Hifi series 2A3s just to see if the higher power output is something I can hear in the music, these tubes are less than $100 a pair.  My intention for the amp was to primarily use it as a 45 amp, there is something about this tube that I find greatly appealing.   The way people talk about it stirs a certain romance.

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