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pager8

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Hi all,
Just to say hello to you all as I have just joined. Looking to acquire power amps possibly 686. I have built kits before but I am no expert
If I go ahead I will be looking for guidance from all you good folks
pager8 (Geoff) UK
 
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Welcome aboard Geoff. You can get a good idea of what's involved in a Modulus-686 build here:

Tom
 
Hi all,
Just to say hell to you all as I have just joined. Looking to acquire power amps possibly 686. I have built kits before but I am no expert
If I go ahead I will be looking for guidance from all you good folks
pager8 (Geoff) UK
Hey Geoff, if you want some support, I would like to know, if you have some questions about your project? Also it is recommended to have at least some knowledge in working with electrical devices or electronics in general. Can you give us some insight?
 
Hey Geoff, if you want some support, I would like to know, if you have some questions about your project? Also it is recommended to have at least some knowledge in working with electrical devices or electronics in general. Can you give us some insight?
Hi, Just thinking about where to go in my Hi Fi journey. I have built successfully tube amps and phono and pre amp stages before (with good instructionsbut I am no expert by any means I can follow instructions without knowing the reasons why but still acknowledging the dangers involved
 
Messing with mains voltage is dangerous. Let's not pretend that it isn't. That said, it is two connections that you need to make in the Modulus-686 so as long as you can connect black to black and white to white securely you should be good. I further recommend insulating the connections with heat shrink. The rest of the connections in the amp I show above are all low-voltage connections. Now, you could still get a zap if you touch the right connections (say from +36 to -36 V) but you really have to try hard at it. In general, don't poke around inside the amp when the power is on.

If you've already built tube amps I wouldn't be super concerned that you'd go off and electrocute yourself, though that risk is always there with DIY projects.

The risk with the Modulus-686 is mostly a financial one. It's an expensive project, though I've had tube amps that cost more to build. For some reason, a few builders of the Modulus-686 have managed to reverse the power supply connections which destroys the amp module on the first power-up. That makes for a sad and very expensive day. The modules are not easy to repair either. For this reason I generally don't recommend the Modulus-686 as a first project, but if you already have build experience it shouldn't be too difficult to put it together correctly. Also, as you can see in the video, it's pretty easy to verify the connections to the power supply before you plug them into the amp modules. That alone will prevent a lot of tears.

Should you get stuck along the way I'm only an email away.

Tom
 
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