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Posts posted by Jazz Guitar
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Thanks, but I think I did recall seeing that long ago and that's where I got that figure of "6". Probably should be a "5".Originally posted by exactopposite:
there is some info at this link on myles website about how the gt scale relates to the mesa boogie tube color code. pretty much the tubes the boogie sell are in the 4-6 range of gt tubes. http://www.guitaramplifierblueprinting.com/pastinfo.htmlOriginally posted by Jazz Guitar:Myles, if a Boogie owner were interested in a pair of GT 6L6GEs, what would you recommend, keeping in mind the non-adjustable bias? I figure Boogie's fixed bias setting allows for considerable "slop" and a pair of the GT 6L6GEs with a "hardness" of about 6 should do quite nicely, as long as they were a matched pair.
I also brushed up on the balanced phase inverter tube aspects. Sometimes some of the NOS websites will offer a balanced PI for a few bucks more.
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Myles, if a Boogie owner were interested in a pair of GT 6L6GEs, what would you recommend, keeping in mind the non-adjustable bias? I figure Boogie's fixed bias setting allows for considerable "slop" and a pair of the GT 6L6GEs with a "hardness" of about 6 should do quite nicely, as long as they were a matched pair.
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Check out the reviews of the Reverend (Naylor) speakers:Originally posted by sgguitarzz:In the short time I have fooled with it this speaker is kind of harsh and brittle sounding. I need a warmer more versatile speaker as I play a wide variety of music and not just raunchy rock.
http://www.harmony-central.com/Guitar/Data/Reverend/All_Tone_1250_Speaker-01.html
Celestion reviews:
http://www.harmony-central.com/Guitar/Data/Celestion/
Altecs and Jensens might be worth looking into too.
The Reverend speakers are cheap, $59, and supposedly have a nice warm "vintage" sound.
Celestion V30s and 90s are about $100. Both Jensen and Altec make very affordable speakers too, Santana being an old Altec guy for the longest time.
Too bad about EVM though. THey made tough and clean speakers that really dissipated the power.
One of my speaker cabinet favorites are the Boogie/Thiel, which used to offer the choice of EVM or Celestion 90. Very nice little 1x12.
Opps, lest I 4-get, you might want to look into "Razor's Edge" speakers. The have a big following in the jazz world.
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Yeah, that's the bad Celestion. Kind of a raunchy rock speaker, by design. Believe it or not, and I could be wrong, but some mega-expensive Matchless come with the G12T-75. Huh? That's dumb, and then some.Originally posted by sgguitarzz:Thanks for the info. I planned on changing the V1 to a 5751. These are always nice in V1. The speaker is a Celestion G12T-75.
EVM doesn't make speakers anymore. They made the cleanest and best power handling music intrument speakers.
Altec is still around, same with Jenson. THe Reverend (Naylor) folks have their own brand of speaker now, as does Mesa Boogie.
Celestion V30 and 90 are quite good. Can't go wrong with them.
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You might try a 5751 swap for a 12ax7 in the V1 slot, or a 12AT7. NOS 5751s can be had in the $10 to $15 range, and will probably last forever (especially Joint Army-Navy or "JAN"), like RCA, Sylvania, GE, Philips.Originally posted by sgguitarzz:Hey Myles, I just picked up one of these off of Ebay and it has all the original crappy stock Sovteks. Any recommendations for tubes in these amps. I know there are some similarities between these and the Fender Pro Reverb Tubes series. It has a nice clean but the OD channel is very gainy. I think this amp has alot of potential with a few changes. I was also thinking of changing out the Celestion speaker to a Reverend Alltone 1250 which might be a little smoother. Any suggestions would be appreciated. Thanks.
WHich Celestion do you have? If it's a vintage 30 or 90, I'd keep it. They're pretty "smooth" as is.
Now here's Myles with a word from our sponsor.....
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Smicz TADs.Originally posted by Ziggy:Myles,
I remember reading in one of my Guitar mags some time back about a tube that could be used to lower your amps output to 1 watt. I have a pro jr. and would be interested in getting a set of these if they do exist. Do you have any information about these?
Thanks in advance,
Zig
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Interesting Myles.Originally posted by myles111:My point of view, the IIB and C were the best of the Mark series. Then the Mk 1 and the III. The IV is too complex for my tastes and the clean is too hi-fi.
I have a problem with the older Boogie's controls, or lack thereof. Striking the balance between the clean and distortion settings was always a compromise. Newer Boogies have independant controls for each channel, which I vastly prefer.
The Mark IV is a 3 channel amp which is going to be more complex. I wish they hadn't shared tone controls, I'd prefer independant ones for each channel. All in all though, the Mark IV sounds much less nasal to me at lower volumes and doesn't have the gain balancing problems of the older Boogies. Being a jazz player I appreciate its clean channel for archtop use too.
One thing I'm sure you are aware of, the Mark IV has much more of it's innards mounted on PC boards.
Sure doesn't look like the point to point Boogies of old.
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Originally posted by myles111:
Myles, what might you think of the "holy grail" Boogie Mark IIC+? I have one but prefer my Mark IV, vastly.Originally posted by Mr Nice Jazz Guitar Guy:
Mr Nice Jazz Guitar Guy..........Originally posted by myles111:
Myles, have you gotten a chance to tinker with a Fuchs? From what I've heard, they are really nice amps, with a Dumble and Boogie kind of sound.Originally posted by lg64strat:[qb]Hey Myles,
What do you think of Carvin amps, particularly the Belair and Nomad? I noticed that Eurotubes has them listed as one of his favorites now...
I love the amps from Andy Fuchs. I think they give a lot of that Dumble quality, and I prefer them over some of the other "Dumble copies" as they are very price effective and very nicely built. They are much more versitile than a Mesa type front end also, and more articulate to my personal style.
I think the Fuchs stuff will go up in price pretty soon, maybe in 2004, as they are still somewhat underpriced for the level of quality and components used. At this point they are still something of a nice bargain.
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Originally posted by myles111:
Myles, it looks like Andy's list of authorized dealers has quadrupled over the last year. Most impressive. I guess the word got out.Originally posted by Mr Nice Jazz Guitar Guy:
Mr Nice Jazz Guitar Guy..........Originally posted by myles111:
Myles, have you gotten a chance to tinker with a Fuchs? From what I've heard, they are really nice amps, with a Dumble and Boogie kind of sound.Originally posted by lg64strat:[qb]Hey Myles,
What do you think of Carvin amps, particularly the Belair and Nomad? I noticed that Eurotubes has them listed as one of his favorites now...
I love the amps from Andy Fuchs. I think they give a lot of that Dumble quality, and I prefer them over some of the other "Dumble copies" as they are very price effective and very nicely built. They are much more versitile than a Mesa type front end also, and more articulate to my personal style.
I think the Fuchs stuff will go up in price pretty soon, maybe in 2004, as they are still somewhat underpriced for the level of quality and components used. At this point they are still something of a nice bargain.
I'd love to see him make a rackmount tube preamp, an "affordable" one at that.
He still modifies existing amps too at affordable prices. Nice to know.
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Originally posted by myles111:
Myles, have you gotten a chance to tinker with a Fuchs? From what I've heard, they are really nice amps, with a Dumble and Boogie kind of sound.Originally posted by lg64strat:[qb]Hey Myles,
What do you think of Carvin amps, particularly the Belair and Nomad? I noticed that Eurotubes has them listed as one of his favorites now...
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Originally posted by myles111:
Hey Myles, do you like the Monteleone pics? I think this one is a "Radio Flyer", going for a paultry 15 grand. If this was 1999 all over again, I'd actually consider it!Originally posted by Mr Nice Jazz Guitar Guy:
Tube do need a load, i.e., transformer in most cases.Originally posted by myles111:
Oh Myles, why is it necessary to always have a load connected to a tube amp, when it's perfectly safe to powerup a transistor amp with no load?Originally posted by mherrcat:[qb]I have a Mesa/Boogie MKIIb with an 8 Ohm EV12L speaker. Mesa recommends using the 4 Ohm speaker jack when in the 60 watt power mode.
If I were to use a THD Hot Plate, would I need to get the 8 Ohm model and still plug it into the 4 Ohm speaker jack?
Also, if memory serves, tubes need a transformer on the output for impedence matching, where transistor amp have no need of this. Why is that?
They didn't teach us tubes in school.
Transistors can be direct coupled to capacitor coupled.
This is all covered in detail in my Tube Primer section II.
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Originally posted by myles111:
Oh Myles, why is it necessary to always have a load connected to a tube amp, when it's perfectly safe to powerup a transistor amp with no load?Originally posted by mherrcat:[qb]I have a Mesa/Boogie MKIIb with an 8 Ohm EV12L speaker. Mesa recommends using the 4 Ohm speaker jack when in the 60 watt power mode.
If I were to use a THD Hot Plate, would I need to get the 8 Ohm model and still plug it into the 4 Ohm speaker jack?
Also, if memory serves, tubes need a transformer on the output for impedence matching, where transistor amp have no need of this. Why is that?
They didn't teach us tubes in school.
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Well I won't touch that......Originally posted by myles111:
Caevan O'Shite...........Originally posted by Caevan O'Shite:Hey, Myles, big dumb question time:
Hey Myles, who had the first master volume amps? Boogie? Traynor? Bogen?
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Download part 2 of my tube amp primer off my website, it is all there.[/QB]
I looked on page 52, but that didn't really explain the usage or rationale of the phase inverter.
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Originally posted by myles111:Originally posted by jetboy:
[qb]
Hey Myles. If you're up to sporting dumb questions, can you tell me why tube amps "need" a phase splitter? Push-pull transistor amps have no such need. Sorry, they didn't teach us tubes in school, except for a little CRT stuff.jetboy .... okay .... I will take aThe EL34 is a BIG part of the problem. Try a good 6L6.
The preamp tube changes will help even more.
See, there was a need for Latin and tubes after all. Calculus too.
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Good question. X-rays are produced when high speed electrons (or positrons) are suddenly SLOWED. I believe Dr Roentegen (sp?) called x-rays "breamstrelung" or something like that, the word being German for "slowing down".Originally posted by Chip McDonald:Ok, here's a typically Chip off the wall angle:
Is it possible to make X-rays with a rectifier tube?
If so, is it possible to be receiving lose-doses of x-rays when near tube-rectified amps... ?
Guitar amp voltages probably aren't high enough to accelerate electrons to the point where they could give off x-rays. Old style color picture tubes sure could though. Of course the grid voltage is on the order of 20,000 VDC.
Feel free to ask Myles
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Past tense? What happened?