Deang Posted March 1, 2005 Share Posted March 1, 2005 Actually, I don't know what it is. SRPP design with a regulator tube for an output tube. Well, it's been sitting over at Craig's collecting dust as the poor guy just doesn't have time to listen to it -- so I just traded him a nice set of networks for it. I'm not gonna tell ya all what I'm going to do with it, cuz I don't think I could stand the abuse. Quote Link to comment Share on other sites More sharing options...
Guy Landau Posted March 1, 2005 Share Posted March 1, 2005 One of the best amps that I've heard was using the 6336 tube as an output tube. The builder of this amp had claimed that the 6336 is like 2 300B tubes in one envelope. That's why I bought this baby . Quote Link to comment Share on other sites More sharing options...
JJkizak Posted March 1, 2005 Share Posted March 1, 2005 Yes, now I remember, those glass things that got real hot, and had lots of distortion, hum, residual noise, popping, short life span, poor transient response, microphonically inferior, socket contact corrosion, gas, large power consumption, vibration sensitive, feedback galore, 160khz resonances, etc. It was a long time ago, I can just barely remember. JJK Quote Link to comment Share on other sites More sharing options...
Deang Posted March 1, 2005 Author Share Posted March 1, 2005 Luxman MQ-80. Very nice. Quote Link to comment Share on other sites More sharing options...
maxg Posted March 1, 2005 Share Posted March 1, 2005 ---------------- On 3/1/2005 9:27:04 AM JJKIZAK wrote: Yes, now I remember, those glass things that got real hot, and had lots of distortion, hum, residual noise, popping, short life span, poor transient response, microphonically inferior, socket contact corrosion, gas, large power consumption, vibration sensitive, feedback galore, 160khz resonances, etc. It was a long time ago, I can just barely remember. JJK ---------------- Yup - those are the ones - sound great dont they! (Not sure about 160 KHz resonances though- I wonder who heard them?) Quote Link to comment Share on other sites More sharing options...
Frzninvt Posted March 1, 2005 Share Posted March 1, 2005 I love the old Luxman tube and SS gear, I think when I venture into tubes I want some Luxman amps. That one looks very nice. I also like the 3045G's like the three that Artto runs in his system. Quote Link to comment Share on other sites More sharing options...
Guy Landau Posted March 1, 2005 Share Posted March 1, 2005 I've had the Lux MB3045 and although they were nice, I wasn't that inpressed with them. The 6336 is a true double triode and not a penthode that is internally wired as a triode like the 8045. Quote Link to comment Share on other sites More sharing options...
Deang Posted March 1, 2005 Author Share Posted March 1, 2005 "Yes, now I remember, those glass things that got real hot, and had lots of distortion, hum, residual noise, popping, short life span, poor transient response, microphonically inferior, socket contact corrosion, gas, large power consumption, vibration sensitive, feedback galore, 160khz resonances, etc..." Hmmm. Sounds like you were listening to an Eico. Quote Link to comment Share on other sites More sharing options...
Painful Reality Posted March 1, 2005 Share Posted March 1, 2005 ---------------- On 3/1/2005 9:40:33 AM Guy Landau wrote: The 6336 is a true double triode and not a penthode that is internally wired as a triode like the 8045. ---------------- Do you know what was the base tube they use to come uu with the 8045? I've heard this version quite often (that the 8045 is a pentode wired as a triode). It would make sense economically for Luxman to come up with a "soft scam" like this. But on the other hand, when I look at the plate curves provided for the 8045, I don't recognize anything that remotely looks like a pentode connected in triode. Those plate curves are really those of a "real" triode. It has always intrigued me. Quote Link to comment Share on other sites More sharing options...
Frzninvt Posted March 1, 2005 Share Posted March 1, 2005 I see Guy just bought that MQ80 off AudioGon I think. It looks like new. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted March 1, 2005 Share Posted March 1, 2005 Dean, I'm emailing back and forth with Jeff about some possible tweaks for this baby so be patient and get my crossovers built I want them bad even though I'm sure they won't do any good LOL !! Oh and I don't want any of those cheap a$$ caps in there they always sound like sh!t Craig Quote Link to comment Share on other sites More sharing options...
Deang Posted March 1, 2005 Author Share Posted March 1, 2005 Be careful guys. This John Day character sounds like he knew what he was doing, (not that you guys don't)! It sounds like he spent a lot of time trying to get it right. I was actually going to build your networks with all the Mylars I have laying around. I mean, I doubt you will actually be able to hear the difference. One nice thing is that all of those caps are well broken in. The high voltage comes off the transformer and integral V-twin rectifiers, and is tuned up slightly with a small cap before being filtered through the large 10H choke mounted up top. Then it goes to the 3500 uF Sprague Powerlytic cap, which is a 450V cap seeing less than 300V for long life. Then it goes to the filter chokes for the drive stage and the output stage. In the case of the output these are the big 10H chokes slung underneath, and are the parafeed chokes. Each of them feeds a plate which has an output transformer stood off from ground by a 100 uF Solen cap to the top of the cathode resistor for that side of the 6336A. This is kind of like a 100 uF cathode bypass cap except that it puts a little local negative feedback into the output stage for a stronger, tighter presentation. The drive stage is SRPP 5965A tubes with both channels going through each tube and the 6.3V supply for the top tube floated up to about 200V, as I recall. Properly done, at any rate. The bottom 5965A shares the 6.3V supply with the 6336A, and is floated up to 20 or 30V as I recall. The drive stage couples to the 6336As through 4uF Sprague Black Beauty caps. I listened to a WHOLE LOT of caps in this position. Trust me, this is IT! The grid of the 6336A is DC coupled to ground through a 350H grid choke on a permalloy core to allow sourcing of positive grid current on peaks. As a result the amp makes about 10W on peaks instead of the 6W it should normally make. The way things end up the output taps are about 8, 4, and 2 Ohms. The two switchable inputs have an OFF center position and go into a 100kOhm audio-taper stereo pot, a cheap Alps. This goes to the grids, which have Allen Bradley grid stopper resistors that proved absolutely necessary for proper functioning. For safety there are also grid resistors of high value to ground, so bias isn't lost if the pot fails or develops a conductivity gap. The big fancy poly-in-oil caps up front are really nice caps and feed the drive stage. The smooth, organic sound of this amp is a characteristic of the milled graphite plates of the 6336As. The metal 6336s sound different, but not as good to me. I truly tweaked this amp for years. I believe it can be made to sound worse, but probably not better. It excels at natural fleshtones and is an ideal foil to "mechanical sound". Quote Link to comment Share on other sites More sharing options...
fini Posted March 1, 2005 Share Posted March 1, 2005 I'm a little disappointed this thread is not about beach volleyball. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted March 1, 2005 Share Posted March 1, 2005 ---------------- On 3/1/2005 10:07:48 AM DeanG wrote: Be careful guys. This John Day character sounds like he knew what he was doing, (not that you guys don't)! It sounds like he spent a lot of time trying to get it right. I was actually going to build your networks with all the Mylars I have laying around. I mean, I doubt you will actually be able to hear the difference. One nice thing is that all of those caps are well broken in. You put cheap a$$ caps in there for me and the deals off !! I'm sure they won't make any difference I just want you to spend as much as possible since I have $600 in this amplifier LOL !!!!! Heck I even have some spare tubes I bought on top of that to send along. Craig Quote Link to comment Share on other sites More sharing options...
Deang Posted March 1, 2005 Author Share Posted March 1, 2005 So, what you are saying is that you want the Corvette version? O.K., time to show how little difference capacitors make. I'll have to go through Mike Percy to do what I want to do, so I'll need at least 10 days for shipping and the build. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted March 1, 2005 Share Posted March 1, 2005 No problem on ten days !! The little or no difference should be worth the wait what are you cooking up parts wise ? Craig Quote Link to comment Share on other sites More sharing options...
Deang Posted March 1, 2005 Author Share Posted March 1, 2005 Are you sure you want to know? I thought about trying some Blackgate AC electrolytics. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted March 1, 2005 Share Posted March 1, 2005 Uhg !! Quote Link to comment Share on other sites More sharing options...
ben. Posted March 1, 2005 Share Posted March 1, 2005 Build him a set of A's with Jupiters, and I'll trade him for them a couple weeks from now! Quote Link to comment Share on other sites More sharing options...
NOSValves Posted March 1, 2005 Share Posted March 1, 2005 One of the best amps that I've heard was using the 6336 tube as an output tube. The builder of this amp had claimed that the 6336 is like 2 300B tubes in one envelope. That's why I bought this baby . Guy what was the output power of this amp. Was it Parellel SE or Push Pull ? Quote Link to comment Share on other sites More sharing options...
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