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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Some comment on your wiring... posted by cheap-Jack on January 20, 2005 at 09:21:34:
Hi,> for EACH channel as in your case, I'd use two RF coaxial centre
> conductors, run as TWISTED pair (one as signal go & the other as
> signal return, so 100% balanced).That is exactly as I do, actually. I did not twist them for reasons of utility.
> I would shield this twisted pair in ONE only common overall
> screen sheath, to reduce the capacitance always induced btwn
> the signal wire & the shield by half.What you propose does not cut capacitance in halve, it reduces it, but not as far as you think.
> I would also ground the overall shield sheath only at the input
> stage local ground point, leaving the other end at the input jack
> UNgrounded.I have actually done so. BUT, I wanted one unbroken piece of wire to the Topcap of the 310A, so I kept the shields seperate. It's a matter of utility.
> The idea is to make sure any stray EMI noises be drained
> away affectively.You will find that this is the case with my approach of wiring.
> (2) bundling up signal cable -
> I would run signal cables of each channel separately,
> away from any HT, LV power running cables.Funny. This is exactly what I did. The second bundle is only speaker wires and HT...
> IMO, bundling up cables is a old-school practice
> for "tidy & neat" layout looking?YEs, I actually learned doing it with thread to tie them.
> It is pretty 'unhealthy' sonically.
Nope, it depends how you do it. In many cases it can be better than wild birdsnest wiring. You MUST understand the current loops and the magnetic fields involved though.
My main point was to keep seperate bundles for different types of circuit wiring, don't mix.
In the end there is also a modicum of practicality. In the end the shortest distance between two points is still a straight line.... ;-)
> I'd surely try your tweak of 'starving' the signal valves
> with lower heater voltage & see how it would better the sound.It's not so much my own tweak. What this does is to slightly lower the transconductance, more critically, it keeps the level of transconductance more constant over time.
> Good DIY listening
Same to you, I hope it sounds great over there.
Ciao T
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Follow Ups
- Re: Some comment on your wiring... - Thorsten 01/20/0509:59:22 01/20/05 (0)
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