Hi everyone, Im new here, this is my first post. EDIT: Just realised I may have neglected the site etiquate and failed to introduce myself properly - Ive just done that on the Intructions section. Cheers!
Anyway, on with the story...
Im putting together a large 6 x 6550 bass amplifier. Im using stacked dual HT lines at 300V and 600V, for smoothing Im using CLC filters on both lines.
I just wanted to ask about the placement and orientation of the chokes. Ive have a long look online but I cant find an answer that Im happy with. Very few amps seem to use a choke on the upper HT supplying the power valve anodes, only on the lower HT supplying the screens and the preamp valves, so not many people have hit this problem.
From what I can tell, the chokes are the greatest offenders for stray magnetic fields, since they are dropping the entire AC component of a rectified sine wave, which has alot of harmonics at 100Hz, 200Hz, 300Hz etc. I need to place them as far from the input valve as possible.
[IMGDEAD]https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-ash3/558068_10151635765646340_195900044_n.jpg[/IMGDEAD]
But, can I place them side by side, or will their magnetic interraction with each other effect their operation as inductors? Will placing them side by side either increase or decrease their inductance, since they will either have the magnetic field generated from the AC component of the rectified signal in phase or antiphase with each other?
Is this important, or can I just place them side by side without any adverse effects?
Cheers for any help! Mike
Im putting together a large 6 x 6550 bass amplifier. Im using stacked dual HT lines at 300V and 600V, for smoothing Im using CLC filters on both lines.
I just wanted to ask about the placement and orientation of the chokes. Ive have a long look online but I cant find an answer that Im happy with. Very few amps seem to use a choke on the upper HT supplying the power valve anodes, only on the lower HT supplying the screens and the preamp valves, so not many people have hit this problem.
From what I can tell, the chokes are the greatest offenders for stray magnetic fields, since they are dropping the entire AC component of a rectified sine wave, which has alot of harmonics at 100Hz, 200Hz, 300Hz etc. I need to place them as far from the input valve as possible.
[IMGDEAD]https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-ash3/558068_10151635765646340_195900044_n.jpg[/IMGDEAD]
But, can I place them side by side, or will their magnetic interraction with each other effect their operation as inductors? Will placing them side by side either increase or decrease their inductance, since they will either have the magnetic field generated from the AC component of the rectified signal in phase or antiphase with each other?
Is this important, or can I just place them side by side without any adverse effects?
Cheers for any help! Mike
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