Welcome to my guestbook, where you can see what previous visitors think about this site and my projects and articles. Many thanks to everyone who has left messages - your feedback really is appreciated!
Guestbook entries from May 2003 (6)
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- Maurice Oden
- Australia
- 25 May, 2003
I am delighted to find a site that appears to know something about Rogers speakers.
As the company has been taken over I cannot find information about the Studio1 model that I have and I would like to attempt to modify the existing crossover to make the speaker bi-wired. Would you be kind enough to advise me where I could find this info?
I have looked at the circuit board,but without much electical knowledge and a circuit diagram, I have very little idea of how to proceed. I had thought of simply breaking the copper connections to the tweeter on the circuit board at the amp input and leading the tweeter connections out to 2 new terminals on the back of the cabinet. But which connections???? It is a puzzle!
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- Scott (SAWZALL)
- Washington DC, USA
- 16 May, 2003
A rather sweet website... Will be quite interested if you take your preamp to the DIY market.
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- Francois
- Venezuela
- 14 May, 2003
Good place..., your website is interesting... much success in your projects
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- Andries
- Holland
- 14 May, 2003
I realy like your way of building the amp, and think i'll give it a try. I have a question however, would it be possible to use the gainclone as a guitar amplifier, and what kind of a preamp do i have to use,to lift-up the input sensitivity to about 20mv. Do you have a sugestion, or more usefull, a schematic ?
You've build a real nice and simple to copy amp, and your website is really top of the tops ! ! !
Best regards,
Andries -
- ShOoPoO
- Canada
- 13 May, 2003
looks good:)
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- Matt Wenham - DoctorRad
- UK
- 6 May, 2003
Hi Mark, Found your pages on a Gainclone search, some very nice stuff you have going on here.
I think you might find Ben Duncan's writings on preamp design a bit of a eye opener. Try contacting Audio Synthesis for reprints of his AMP-01, AMP-02, PAS-01, PAS-02 and CD Player mods from Hifi News. I only have AMP-01 these days unfortunately, but most of the groundwork on how op-amp circuits behave in the real world is covered in this text. Suffice to say, for DIY projects, it really is worth avoiding spoiling the boat for a ha'ppeth of tar and going for better op-amps than 5532s. But as you point out, they may well be 'good enough', and they're cheap to replace when things go wrong.
My current thoughts are leaning towards trying a Gainclone with a fully regulated supply. Naim have been doing it since the 70s, but thankfully, Moore's Law apparently applies to analogue chips as well as digital. You can now get stupidly cheap, stupidly good (value) chips to do pretty much anything. It's a New Golden Age, it really is.
Cheers,
Matt...