audio-talk

Its hard to say without seeing the box to say whats running, opening a console and runing top might give more clues. The problem is that I think Ubuntu is aimed at the typical PC now, and that normally includes about half a gig of memory. The way the display system (X) works is very different, its c...

So my belief was that, this wasn't a 'welly' issue. It was that most valve amplifiers were happiest with a low impedance source and CD definitely was not low impedance. Well, most stock CD's I have seen have a pair of op amps on the outputs, so that should provide for a low impedance source, with t...

andrew Ivimey wrote:and, typically, a CD player gives you a high impedance output!

It doesn't do any harm, it just could sound better... probably!

gives you a low impedance output!

No, just different. Only bad thing is if the driving source has a high output imp. The phono stage you are building should be ok, as its got thecathode follower on its output.

No, it just means the input impedance will be 50k instead of 100k

Yep, the 5687 has two triodes in it, so it does both chans.

I used to like how Quad did their tone controls. Seemed to be more use for taiming problems recordings

Yep, maybe I should rephase that. There are more complex bits of maths in there, but you don't miss much if you just scan over those bits, but IMHO, if you leave out ALL the maths the book looses some of its value. But even if you don't understand something, you find (I know I did) that when you com...

Yep, as long as you are not allergic to some simple maths, the first one of those will teach you 95% of what you will ever need.

Yes very impessive ~ not terribly portable I imagine... What, are we building amps for ipods? Mind you can take as long getting a decent box together as it does the actual cct ~ and woe betide if you then want to modify something Boxes are bad, mkay? Time to find that picture of Pauls 212 again I g...

I can think of a couple of possible problems with doing it like that tho, can anyone else?

Yep, but you can learn a lot trying to fix those problems.

Have a word with Phil at Bluebell

http://www.bluebellaudio.com/

Hammond 154E 20H @ 20ma

or

Hammond 155J 15H @ 30ma

Both should be fine.

Graeme wrote:

As you can see, looking a little messy!

Seen (and built) worst

Joined: 28 Oct 2008

Maybe tomorrow?

Should be fine. What happens when you try and post pics?