Recent content by atmasphere

There is also the issue that this thread is *about* low watt tube amps... but dig into the hows and whys- that's where the demons lie in wait.

Ebay is a good source. Just keep an eye out. You will have to arrange to have the filter caps replaced due to the age of the unit. Right now there are two there: http://shop.ebay.com/?_from=R40&_trksid=p3907.m570.l1313&_nkw=dyna+MkIII&_sacat=See-All-Categories

If you are talking about lightweight, class D probably offers the lowest weight of anything out there. I have a class D circuit sitting on my bench that makes 100W and is the size of a pack of cigarettes (of course, its missing the power supply), but the whole amp in a chassis would be about 5-7...

You ever try a class D amp?

Harvey Rosenburg gave one of our amps a stellar review about 13-14 years ago. But it was his NYAL amps that were part of the marketing issues we have faced over the years. I thought we *were* talking about bass amplification. I have played string bass since I was in 7th grade, so in...

Cecil Hall patented the Circlotron about 1955. As a parallel OTL technology it developed at the same time as the Futterman but did not get the same attention. It lay dormant until I picked up the torch in 1977 and developed my own patents in the field in succeeding decades. I did not know about...

I'm sure drurb and I agree on this one :)

Actually, if you want to have a credible argument, this particular comment should be avoided. It is about as false and ridiculous as it gets in any of these tube/transistor debates, which we have seen rage on the 'net for the last 20 years (I was on the newsgroups before the web existed). Even...

Actually other than the fact that it is tube, it has no other similarities to the Futterman amplifier, which is historically unreliable. This amp uses something called a Circlotron, which is inherently symmetrical and allows for a simple, stable and reliable circuit. The amp that I have is...

Well, the *amp* can weigh that little, but the speaker is a different matter! I get the weight down by using toroidal power transformers and there is no output transformer in the circuit I use. The only issue it that the amp needs a speaker that is higher impedance to make the power with as...

Not meaning to start anything here but I've been doing amps for a long time too- over 40 years. There is a simple reason why tubes get audible preference, and its not a frequency response error. It has to do with a lack of a certain type of distortion, namely the 5th, 7th and 9th harmonics...

So, if you had a 50 watt tube amp that weighed about 20 pounds, would that be OK? I've been making guitar amps under the Rendition name for the last 6 years Invalid Link Removed The amp on the site is a guitar combo, but the actual power amp itself only weighs about 15 pounds or so. Its...