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Hennie,  :stop: "not surprising considering the amount of current related distortion generated by loudspeaker motors of simple design. Sophisticated motors will benefit less and compression drivers with their saturated magnetic circuits almost nothing". What are you attributing this...

Thanks Waterhond, I looked all around for a way to attach a picture, even looked through the help files and couldn't figure it out. So your pictures have to be on a host site then. :walled: :notworthy: :notworthy: :notworthy: :notworthy: Steven

  I see what you are saying and I have not posted a picture besides the avatar so I can't help you there. I will try and figure it out....  My kid could probably do it in an instant. I tried to draw a image in and that did not work.....

Wade99, What is it that you are trying to do? Upload a picture on the page or add an icon. Be more detailed so you can get some help. Steven

U235, I won't attempt to answer any of the other questions but I think that the reason that most vacuum tube amps are built point to point is because the current to drive some of those tubes is much higher than you need with a solid state device. It would take a wide and thick trace on a board...

Eskom, A question just from the observation of your setup there. Nothing to do with your grounding or anything else, but why on the power amp in the picture did you chose to mount the output transistors on the aluminum angle instead of more directly on the heat sinks? Wouldn't that have the...

Wade, I was told that the schematic for the Doug Self preamp was available from the Elektor website. Not sure if you have to register to get it. As you say it is an expensive build and there is much discussion about that build and the sound of different op amps including the 5532. Seems there...

Not to stir the pot,  :sh1tstirrer:, but there is a build going on, or actually much discussion of the Doug Self second generation pre-amp. You can find the boards and information on the Elektor Magazine site. The discussion is for the New Doug Self pre-amp design...

Johnc, So are you saying that you are wiring point to point on a simple single chip implementation?  :thinking: No problems without having a ground plane from a board or are you just using a simple star ground point for all your ground circuits?  :teach: No problems with any noise this way? ...

Perhaps  you have been terminated by a very bad Transformer.......... :point: :point: :point:

NoSnipeLimit, I would only wonder about all the RF and EMI radiation inside a computer cabinet and the noise on the power supply rails. And a PCI slot. boy are we dating our computers there. Try and find anything made for a full length PCI slot these days......  :walled: Steven

Wade99, You do have to consider that when a port is close to a wall such as the bottom of a cabinet that it actually increases the effective length of the port and will change the tuning. This is why rectangular ports at the bottom of an enclosure have to be looked at very carefully. A tube on...

WaterHond, From just looking at that picture  of the rolls of vinyl I would guess that they are using an adhesive backed material. Save a lot of time and labor if you don't have to put contact cement on the back of the material. :Whoohoo: Steven

NoSnipeLimit, I see how you have drawn the circuit with the inputs to the opamps inverted but is this what is normal for the four channel amp or is this your interpretation of the circuit? I would have thought that in a four channel amp all of the inputs would have been to the + side of the...

Shonver, I agree that real leather is nice and probably a little bit tougher than vinyl, but there are some vinyls that you could hardly tell apart without being able to see the backing. I imagine that you have an automotive materials supplier that can show you some of the vinyl materials that...

I had to do a quick calculation in my head, we're still stubborn and mostly use inches still. That sounds good at 2mm for the leather but from what I have seen of real hides you might want to get a piece you are going to use an mic the thickness. If it isn't close it is either going to stand...

Hey, I resemble that last remark...... :baseball: As one of those Yankees from up on the other side, I got to say you are an interesting group. Coming from the Left coast of a crazy mixed up place I'd rather say that I am color-blind. I live in one of the most mixed up places on the planet, Los...

Heinrich, I know that you wanted the Teak wood finish but there is also something about a nice Rosewood finish. I know  that here in the States it is getting very hard to get decent Rosewood. the good stuff from Honduras is just not happening anymore and most of it as you say is not the dark red...

Timber, Very impressive that you built this yourself and made it work. I have used a similar machine at one of the places I worked but even the commercial machine had trouble holding tolerances and they did have a router motor on it!  Very load as it was used to cut aluminum sheet which sings...

d0dja, I wasn't trying to say that the cost of the Earthworks microphone is a bargain or cheap, but for a dedicated test microphone it is one of the least expensive dedicated mics you can buy. There is no reason you couldn't use a standard microphone for this purpose but without a calibration...