DarkStar_XIII
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The extra gain from the 242s is a benefit to my system. I'm using a Big 7 with volume control direct to an Air Tight ATM-2, which is driving Harbeth speakers.
Tube Rolling for Lampizator Level 7
- Thread starter deuter
- Start date
BTW, a few otther rectifiers that I have seen praised elsewhere that I don't think have been mentioned. I have or hope to have them soon. Problem is finding the time to do the comparison:
1) Tung Sol 5U4G Top Getter: Bottom getter version is pretty common. But a few have said the Top Getter is special. Here is a quote I found: "For those who may be a little confused with the variety of Tung Sol 5U4G tubes, the ultimate one is this version that has the black ribbed plates, hanging filaments and top side getters from the 1940s with the rarer foil getter."
2) Mullard 5U4G: Not the variants but a 5U4G. There is a thread from the Yahoo group, Hong Kong Tube Audio Club, called Recitifier Party. I'll post the thread at the end of this message.
3) Brimar 5U4G: Again not a variant. This one I am getting has a top getter. Does not look like U52 construction so I am curious.
Comments from that Yahoo Group:
＞ Mullard CV31
＞ Osram U52 silver grey plate round black base
＞ Marconi U52 silver grey plate long square black base
＞ Osram U52 silver grey plate round brown base
＞ Osram U52 black plate long square black base
＞ Mullard 5U4G black smooth base
＞ Mullard 5U4G black ribbed base cup getter
＞ Mullard 5U4G black ribbed base inverted tray getter
＞ Mullard 5U4G black ribbed base plate getter triple mica
＞ Cossor 5U4G black round base with re-inforcement ring
＞ Visseaux 5U4G (= Neotron)
＞ WE274B yellow letter base 1950's
＞ WE274B engraved base 1940's
＞ Brimar 5U4G with inverted tray getter
＞ Valvo R2504 globe bottle solid plate 1943
＞ Rectron R0452 globe 1928-1929
＞ Valvo R2504 ST early 1930's
＞ Valvo R2504 globe mesh plate
＞ TFK RGN2504 globe solid plate
＞ TFK RGN2504 globe mesh plate
＞ Cossor 45IU black base
＞ Cossor 53KU/U54 black base
＞ Swedish Standard 22S22C
＞ Valvo AX50
＞ Valvo AZ50
＞
＞ With so many tubes involved, it is very hard to comment on each but
＞ I can start off with a few personal impression/remarks :
Basically I am of the same opinion as Tim. Here are some of my
comments to specific tubes:
＞
＞ - GEC/MOV early silver grey plate U52 are better than the later
＞ black plate ones
＞
＞ - Mullard ribbed plate 5U4G is perhaps the best sounding 5U4G ever
＞ made
＞
＞ - The French 5U4G are great too.
Yep, right on the money...
＞
＞ - The WE274B does live up to its reputation
Though certainly not a bad tube, its reputation is overrated in my
opinion. There were a number of MUCH less expensive types that CLEARLY
outclassed the WE's...
＞
＞ - If you are after better sounding indrected heated rectifier over
＞ WE274B, you cannot go wrong with any of the early German 4V models.
Absolutely, couldn't agree more...
＞
＞ - The indirectly heated 53KU/U54 and 22S22C sound as good as RR
＞ grade 5U4G
The 53 KU/U54 are some of the most amazing British versions, which
will beat the crap out of most of the more commonly known US types...
The 22S22C is a very interesting "GZ3x" derivate that may even be
better than a metal based GZ34.
＞
＞ - The mercury vapour AX50 indeed has the best control
An excellent choice for any amp that demands tight pwr supply
regulation as well as anyone looking for clean sound.
＞
＞ And my favourite rectifier of the day has to be the Rectron R0452.
＞ It is hard to believe a 74 years old tube can sound so-oooo GOOD!
Yes, yes and yes again! When we auditioned the Rectron, Tim and I just
looked at each other as both of us knew, that is it, that's the
ultimate rectifier tube; no further comments were necessary...
1) Tung Sol 5U4G Top Getter: Bottom getter version is pretty common. But a few have said the Top Getter is special. Here is a quote I found: "For those who may be a little confused with the variety of Tung Sol 5U4G tubes, the ultimate one is this version that has the black ribbed plates, hanging filaments and top side getters from the 1940s with the rarer foil getter."
2) Mullard 5U4G: Not the variants but a 5U4G. There is a thread from the Yahoo group, Hong Kong Tube Audio Club, called Recitifier Party. I'll post the thread at the end of this message.
3) Brimar 5U4G: Again not a variant. This one I am getting has a top getter. Does not look like U52 construction so I am curious.
Comments from that Yahoo Group:
＞ Mullard CV31
＞ Osram U52 silver grey plate round black base
＞ Marconi U52 silver grey plate long square black base
＞ Osram U52 silver grey plate round brown base
＞ Osram U52 black plate long square black base
＞ Mullard 5U4G black smooth base
＞ Mullard 5U4G black ribbed base cup getter
＞ Mullard 5U4G black ribbed base inverted tray getter
＞ Mullard 5U4G black ribbed base plate getter triple mica
＞ Cossor 5U4G black round base with re-inforcement ring
＞ Visseaux 5U4G (= Neotron)
＞ WE274B yellow letter base 1950's
＞ WE274B engraved base 1940's
＞ Brimar 5U4G with inverted tray getter
＞ Valvo R2504 globe bottle solid plate 1943
＞ Rectron R0452 globe 1928-1929
＞ Valvo R2504 ST early 1930's
＞ Valvo R2504 globe mesh plate
＞ TFK RGN2504 globe solid plate
＞ TFK RGN2504 globe mesh plate
＞ Cossor 45IU black base
＞ Cossor 53KU/U54 black base
＞ Swedish Standard 22S22C
＞ Valvo AX50
＞ Valvo AZ50
＞
＞ With so many tubes involved, it is very hard to comment on each but
＞ I can start off with a few personal impression/remarks :
Basically I am of the same opinion as Tim. Here are some of my
comments to specific tubes:
＞
＞ - GEC/MOV early silver grey plate U52 are better than the later
＞ black plate ones
＞
＞ - Mullard ribbed plate 5U4G is perhaps the best sounding 5U4G ever
＞ made
＞
＞ - The French 5U4G are great too.
Yep, right on the money...
＞
＞ - The WE274B does live up to its reputation
Though certainly not a bad tube, its reputation is overrated in my
opinion. There were a number of MUCH less expensive types that CLEARLY
outclassed the WE's...
＞
＞ - If you are after better sounding indrected heated rectifier over
＞ WE274B, you cannot go wrong with any of the early German 4V models.
Absolutely, couldn't agree more...
＞
＞ - The indirectly heated 53KU/U54 and 22S22C sound as good as RR
＞ grade 5U4G
The 53 KU/U54 are some of the most amazing British versions, which
will beat the crap out of most of the more commonly known US types...
The 22S22C is a very interesting "GZ3x" derivate that may even be
better than a metal based GZ34.
＞
＞ - The mercury vapour AX50 indeed has the best control
An excellent choice for any amp that demands tight pwr supply
regulation as well as anyone looking for clean sound.
＞
＞ And my favourite rectifier of the day has to be the Rectron R0452.
＞ It is hard to believe a 74 years old tube can sound so-oooo GOOD!
Yes, yes and yes again! When we auditioned the Rectron, Tim and I just
looked at each other as both of us knew, that is it, that's the
ultimate rectifier tube; no further comments were necessary...
Yes, my GG was 2500mv and the 242 did not work. They were reduced to 700mv and all is well now.
Yes, the output voltage is listed. Scan both pages of the spec sheet and post here and we can tell you if we see an obvious issue or not.
PX4 is a great tube, but if you get the 242 to work ...I would vote for that. Never heard the PX25 and my 300b experience are essentially Psvanve UK DESIGN (best value in 300b) and the EML 300b...to slow for me.
I also like my vinage ST shaped National Union 45s (my now dead, WE vintage 101d ST shape) and jack of all trades 6A3. I am yet to try my VT52, which could be great as well. Not a big fan of 2a3 and metal base 101d. Love the EML Lampi mesh Globe 45 too.
JM21
New member
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JM21
New member
Thank you Norman.
WE300b.
- Thread Author
- #72
Like yeah, suregood luck finding one right ?
I have a pair for sale. $2600.
Are you liking it? If yes, tough to find something better. I have the KR PX25, and the special EML 45s, all 3 are different, and have tried them in different systems, but none compare to 242 when it sounds right. 300bs are also different and the KR 45s to me seem laid back, but those into jazz like them. I don't. I have a pair for sale at 300 eur.
Not many people talk about them, but I stumbled upon a Ken Rad version of the 6a3 tube which sounds pretty darn good in our DACs. Better than I recall the Slyvania 6a3s sounding, though I never had them at the same time.
This is an inexpensive tube worth trying out.
This is an inexpensive tube worth trying out.
- Thread Author
- #76
I love it but variety is the essence of life. Iam sure there is a completely different presentation of music with the takatsuki 300 but it's too dear for me in price.
Variety is fun to try when all are more or less equal. Not here
Bill gave up his KR 300, Px25, 45, all for this.
I keep my Px25 and special 45 as back up, in case during some electronics change in the future they don't match and I need another set of valves, or for a friendly shootout. By the new KR special 274 at 1200 USD instead, think they put it up on mono and stereo
I keep my Px25 and special 45 as back up, in case during some electronics change in the future they don't match and I need another set of valves, or for a friendly shootout. By the new KR special 274 at 1200 USD instead, think they put it up on mono and stereo
