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| Shock Brother's DIY Amps Building or modding your amp? Then use this forum to discuss the process and show your pride and joy. |
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#1 (permalink) |
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TDPRI Member
Join Date: Oct 2009
Location: London, UK
Posts: 45
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Lead Dress
Is there a rule-of-thumb so to speak concerning lead dress? What I mean is, are certain leads coming close together going to cause more oscillation than others? How should I know which ones will do this?
Thanks. |
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#2 (permalink) |
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Tele-Afflicted
Join Date: Sep 2009
Location: Stockholm,Sweden
Age: 61
Posts: 1,224
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The general rule-of-thumb is to separate input leads as far as possible from output leads.
There are of course a lot of other things to think of when you are building an amp.Shielded leads grounded only on one end,heater leads twisted ,hugging the chassie and so on.Go to www.geofex.com. www.ayanmusic.com/leaddress.htm will give you a few tips too. Limbe |
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#3 (permalink) |
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Tele-Meister
Join Date: Nov 2007
Location: Columbus, Ohio
Posts: 104
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Go here:http://www.geofex.com/article_folder..._tube_amps.htm
Also study as many pictures of the insides of amplifiers as you can. |
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#4 (permalink) |
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Friend of Leo's
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Wires carrying out of phase signals should be seperated. Gain usually means signal inversion. so as Limbe says, seperate input and output. A Cathode Follower has no gain and there is no inversion, no no need to worry about its input vs output. Remember is you have a lot of gain stages, The odd number are out of phase with all the even numbers.
Again, as limbe says twist the heater wires, shoot for 3 turns per inch Don't forget grounds can be carrying large currents and so can radiate noise magneticly. Don't use the chassis as a ground conductor. Only two things should be electricly connected to the chassis, the incoming safety ground wire, and 1 connection to the ground network, preferbly at the input jack |
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