Prof W. Marshall Leach MC Head Amp

[Richard]

Hi All,

Interesting article here,

http://users.ece.gatech.edu/~mleach/headamp/

Anyone built any of these 3 units? What did you think of them?

Been looking at the last one, the common emitter, if only because it's newer and offers adjustable cart loading.

[Andrew]

-- Richard,

I had a go at this about a year or so ago, I'd be interested in what you think. I have a strip-board layout somewhere, if it helps?

-- Andrew

[Richard]

Hi Andrew,

Thanks for the offer. Did you complete one of the designs and have a listen or not get that far?

Rich

[Andrew]

Hi Richard,

Yes, I got it working, the one you posted...

Do you want me to say or would you prefer to compare notes afterwards you've built and had a listen?

I'm up for either but didn't want to spoil the story if you were just looking for a small project to occupy the coming winter evenings, not that it doesn't look like winter already

I'm sure the thread should be on the BB here somewhere anyway. Suffice to say for the cost I reckon its worth building.

cheers,

-- Andrew

[Richard]

Hi Andrew,

Yeah, shortcut please, is it any good? If not I'll buy or build something better and spend the time saved decorating

Rich

[Andrew]

I didn't put it in a case, just on a bit of vero with a £5er's worth of generic parts.

Very good value for money and showed what my step ups were doing wrong.

I didn't stick with it as it needed shielding and I found a way to improve the step-ups.

I may try and resurrect it, I ought to, tho' I suspect the Piccolo from HagTech is even better.

The problem I have found is step up and active head amps both do different things really well, the problem seems to be getting one good all rounder - the cart has a bearing, of course.

To paraphrase someone else I find the stepups more organic and head amps more dynamic (the PRAT thing).

cheers,

-- Andrew

[Richard]

Thanks Andrew, very useful and I might well give it a go. I realize it's something I'll have to experience for myself but can imagine what you say.

I need another cart first though and want to set it in another arm and deck which I have but don't have an armboard for - idea - will ask for one in Wants

Rich