Monday, January 29, 2007

Latest fiddlings

The innards: EI trafos with their secondaries connected to each other, in pairs. Common connection to the mains on the primaries of one group of transformers (3), the primaries of their correlated transformer are connected to the load (power inlet for DAC, CDP, ETC). It's a way to do an isolation transformer (with it's many advantages) with found transformers.

Don't know if they'll be good for more than 35W a pair. I'll toss some small caps across the secondaries for additional HF filtering. The output wiring and those caps are still pending.

The base. You can see that I used U-channel for the transformer mountings. Cut them by eye with a hacksaw, and drilled the holes by hand. All hardware is stainless, with nylon insert locking nuts. Nice and solid, despite the lightweight box (1/4" ply winebox). The cables will be hardwired, the quick and dirty power inley cable is shown. 3 leadouts with IEC connectors will be used to power several devices. I'm hoping it'll drive my DVD/SACD/CDP, which draws 43W according to spec.... might be too much. We'll see. Certainly the dac, linestage, and digital EQ effectively, so it won't go to waste if it's too small for the player.

What else.... fiddling with digital EQ in the big rig, installed surround channels in the bedroom rig. What's next, still pending is the preamp: octals, with phonostage. Will be using a chassis from Also, the time has come for us to start playing with driver modification. After that's up and running, we're probably going to have a little fun with a small open baffle, with a high density driver compliment- 4 8"s (peerless HDS), a high eff. midrange and tweeter.

I've been keeping hifi on it's toes for a goodly while now.


Post a Comment

<< Home