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What I am looking for is a small EL84 type kit. The reason is in the summer months I want to run tubes but something with a little less heat output than my VTA ST-70 and maybe the Sherwood S-5000.
Although I don't think the Sherwood really puts out that much heat.
I live in Arizona and it get PRETTY hot. Yes even with AC!!!!!
I have a NAD C275BEE solid state amp but that puts out almost as much heat as a tube amp.
SO I was cruising for a decent small output tube amp for hot weather use.
Follow Ups:
If you can build a kit you can assemble a custom, made to your own desires kind of amp. It is a much more satisfying project to do bringing parts together for a nice sounding amp. A single ended pentode amp is about the easiest thing to make. 2 gain stages, 3 tubes for low heat output ( with SS rectification ) and far less parts.
Tubelab Simple SE with SS rectifier shouldn't get too hot and way easy to build with the detailed instructions.
Mine sounds great.
Single ended means Class "A" operation. The theoretical max. efficiency for Class "A" is 50%. In the real world, 40% is about right for a full pentode mode "final". Of the 12 or so W. a 6BQ5's plate dissipates, 7 W. heat the listening space. The OP's Arizona abode makes that a non-starter.
Getting a near Class "B" PP setup sounding good is work. However, it's the only way the Laws of Physics allow the space heating problem to be managed. FWIW, the theoretical max. efficiency of Class "B" is 78.5%. Again, real world results don't match theory, but getting close to 70% beats the living guano out of 40%, when room heating effects are of great importance.
Eli D.
Kit.....NO.
But I built a VERY inexpensive pair of 6ab4/6aq5 tube 10" x 6" integrated SEUL mono blocks.
Solid State rectified, low parts count, and all-new EDCOR (Carlsbad, NM) iron at around twenty bucks a piece.
If you can read an electrical schematic and NOT burn your house down with a soldering iron, it's quite an easy build.
PM me for a schematic, if anyone is interested?
Steve
If you were looking for a PP EL84 kit triode electronics has one. I believe all the major parts like transformers and chassis are made in the USA. It is a copy of the DYNACO ST35 but on a full size chassis.
http://www.triodeelectronics.com/diy35kit.html
I have heard this amp and it is very good sounding. But truthfully, at the time i heard this amp the owner of it was interested in checking out my SE 6l6 amp. And i thought the SE amp was much better. He must have liked the sound of it too as he bought it after the audition. cheers, Dak
nada aqui
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Buy Chinese. Bury freedom.
I'm going to come get you and zip tie you to a chair with the KT88's playing next to you and wait until you dehydrate!!!!! Which should be only an hour or so.
When it's 115 degrees you could be sitting on a block of ice. It DOESN'T MATTER!!!!!
I understand the problem you're describing. I've used kilowatt-level ham radio gear back east in houses with no AC. The point is, unless you're in an extremely tiny room (like a closet), the difference between an ST-70 and a high quality amplifier with EL84s will be insignificant. The solution for a more comfortable environment is to either add BTUs/CFMs to your cooling system or move the audio gear out of the listening space.
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Buy Chinese. Bury freedom.
was to rig up a clothes dryer exhaust tube on her Sherwood S5000. She has washer and dryer hookup,but goes to the club center where they have laundry machines.
What she did was install two boxer fans out of phase with each other,one at each end of the dryer exhaust tube.She then put the exhaust tube over the output tube section of the Sherwood, and then the other end to output exhaust hole where the dryer would hook up..She rigged up two rheostats,one on each fan so she could control the speed of them. The fan up by the tubes is pulling the heat away from the output tubes and the fan at the opposite end is blowing the heat out thru the dryer exhaust port.She was literally able to drop the temperature in the area the amp sits in by 14.2 degrees F and she said it is noticeable.You can go outside of her townhouse and put your hand by the exhaust port and feel the warm air blowing out. The only inconvenience is that the amp has to sit in the utility room along with her TT,CD player,and Ipad.The AR-LSTs sit in her living room.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 06/29/16
I may look for a SS amp to get me through the Monsoon season. Something to hook up to my Conrad Johnson.
The efficiency rules apply equally to both tubes and SS. SS will have the advantage of not requiring heater power.
You might consider tracking down an original NAD 3020 that's in good condition. The phono section is respectable and the power section is the heftiest 20 WPC you'll ever find. A NAD 3020 will make pulses of 80 WPC into 4 ohm speakers. ;> ) FWIW, Feldman, Hirsch, and TAS all reviewed the original 3020 favorably. Talk about a long odds trifecta.
Eli D.
I have a NAD C275BEE solid state amp. However it also generates a considerable amount of heat.
I may look for a vintage Marantz 250 with meters.
So I may go the vintage amp route for something really cool to look at and use.
An old NAD 3020 is close to butt ugly. However, it "sings" beautifully. NAD spent their money on the inside, not cosmetics. The original 3020 is very much "a little engine that could".
Eli D.
I was in the audio business when NAD first became popular. Like you say, it's all on the inside. Sonics are near the top of the solid state heap. :)
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Buy Chinese. Bury freedom.
That's pretty funny! Next time I move, I'm looking for a house with an entertainment exhaust port. :)
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Buy Chinese. Bury freedom.
Kit no, but we could come up with something built around 6BM8s or equivalent series heater string tubes. We will set things up so the "finals" run at a near Class "B" operating condition set. That way the amp dissipates less power, when "idling".
SS rectified B+ is a given.
If a reliable supply of 6GW8s or series heater string equivalents can be found, that would be an improvement on the 6BM8.
Eli D.
This might fit the wish, excellent transformers, small dimensions and good documentation :
http://www.dynakitparts.com/dynakit-products/amplifier-kits/ST-35-KIT
El84s run hot. I can tell you that.
I built/use a kit from Elekit, the Elekit TU-8200DX integrated. It is not a el-84, but uses a plethora of tubes from the 6l6 family. It pushes my Altec 19's just fine. Yes, there is a bit of heat coming off, but it is not a room heater by any means.
Elekit is a sponsor here at the AA, and Victor has always responded to my questions online and offline very promptly with any issiues anyone has had.
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