Have you looked at the scematic? What do you think. I have been reading in AudioeXpress an article defining how to build a minimal reactance power supply that would fit this pre to a tee. The rest of the schematic seems pretty simple and the tubes are cheap. I haven't heard from Colin but this was originally his Idea so I don't want to take any credit for thinking this up.
colinhester Messages: 1349 Registered: May 2009 Location: NE Arkansas
Illuminati (3rd Degree)
Sorry for the delay. Had some personal business to attend. Yes, I'm still with you and very excited about the group build. Is the new power supply going to be less expensive? I was looking at Hammond power transformers and we were looking at $50 just for this part.....Colin
Well the power supply they use is perfectly adequate, not to worry, there has to be an equivelant transformer for less money. I can search a little and get back to you. Lets establish a budget and see if we can hit the target.
colinhester Messages: 1349 Registered: May 2009 Location: NE Arkansas
Illuminati (3rd Degree)
Let's boiler-plate the cost to bare minimum. Like you said earlier, if people want to build with boutique parts, then that's awesome. I'm just here to learn, have fun and make some new friends. This is my sanctuary from all the world. BTW, where do you get 2x4's for $2.87?
Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
I"ve seen the schematic. Looks like about an hours work, even with the tube rectified power supply. I think it's cool; Nice to put it in an attractive case. Spend a little time on the details and it can be made into a nice looking preamp. And from what I've heard said about it, it will probably be a very nice sounding preamp too.
Wayne Parham Messages: 18791 Registered: January 2001
Illuminati (33rd Degree)
I haven't really looked into the differences between diode, fast-recovery (HEXFRED) and tubes, so I defer to the judgement of guys that have played with 'em. I see it really as a matter of switching time, hysterisis and resistance. But even putting that aside, I think it's cool to have a tube rectifier for a tube amp. Solid state diodes are cheaper and easier, so if a guy substituted one, I could sure see why he might. But my vote is to use a tube rectifier.
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