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 Newbold |
#81 | |||
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Posts: 2 Sun, Jul 26, 2009 06:37:25 |
I just started another thread for this re: bass controls.
I don't see it on the main page so I thought I'd put a link here. http://guitarsbyfender.yuku.com/topic/10222 |
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beddamatrix |
#82 | |||
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Posts: 7 Sat, Aug 8, 2009 12:17:34 |
thanks jbliquori your links is very helpfull... i just got my l90 and l500xl with filter today... thanx to everybody here in the forum...
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oacikgoz |
#83 | |||
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Posts: 8 Fri, Oct 9, 2009 03:22:44 |
I'm curious to know what Q-filter sounds like. There is a clip with Keystones on a Tele, but I need more exposure. I'm wondering whether the filter
known as MTC offered by Ritchie Blackmore's former tech Dawk and RBTC by some other company (to my understanding, it's an almost exact replica) is some
sort of Q-filter? Here is a clip of RBTC on youtube, and the text on the clip pretty much explains what it does.
I always wondered how Blackmore got that wah effect when he picked a note while on the neck pickup and instantly switched to bridge. I got nuts trying to get that kind of tone from the neck pickup and that kind of warble when you switch... If Q-filter IS actually the same thing, I'd be all over it. These guys sell that unit at crazy high prices and it's probably a simple yet smart passive circuit. Could someone enlighten me on this issue? If this is not some sort of Q-filter, what could it possibly be? Thanks a lot! http://www.youtube.com/watch?v=ZhPJPOmUnu8 |
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SirZozzo |
#84 | |||
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Posts: 12 Mon, Nov 16, 2009 17:23:40 |
Q-Filter: How about sound if I change the value of cap from 0.1 to 0.2 uf and resistor from 5 kOhm to 25 kOhm ?
I used Q-filter with 0.2 uf and 25 kOhm, when I turned down tone to 0. Sound life acoustic, but I lost some volume and bass on lower strings. Is that ok ? Someone could help me to know more ? Thank you so much!
Last Edited By: SirZozzo Mon, Nov 16, 2009 17:28:43.
Edited 1 time.
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 lgbclp |
#85 | |||
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Posts: 1323 Wed, Nov 18, 2009 04:56:25 Contributing Palladium Member |
Sounds right from my understanding. If you want to retain more bass, increase the value of the resistor even more.
--Garrett--
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SirZozzo |
#86 | |||
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Posts: 13 Wed, Nov 18, 2009 17:07:59 |
Thank you!
So... what about cap in Q-filter and L-filter ? |
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lgbclp |
#87 | |||
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Posts: 1324 Wed, Nov 18, 2009 23:12:57 Contributing Palladium Member |
I'm not an expert, but a cap generally filters out high frequencies. Higher value should mean less highs as the knob is turned down. I only assume that
this is how it works with the Q-Filter.
So Q-Filter with cap and resistor, as you turn the pot anti-clockwise I think it should have the effect of reducing highs via the cap, yet retaining the preferred amount of bass via the resistor, all the while lowering the inductance (power) of the pickup. I think. 
--Garrett--
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musiz |
Answer | #88 | ||
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Posts: 1 Fri, Nov 27, 2009 17:57:25 |
Hi I'm Larry.
I have been following your online discussion of Q filters. This might be the answer you're looking for. The Q filter in electronics is a filter that will vary the Q of a circuit. The Q of a circuit means the QUALITY of the circuit. This is usually used when talking about filters and tuned circuits and their band widths. A filter has a band of frequencies made up by a group of components usually a coil cap and sometimes a resistor. This group of components will have a band width of frequencies. This group of frequencies has what is called a center frequency. The band width of the circuit is determined by the Q of the band width. Example A.) the band width is from 1khz to 10khz. The center frequency is 5khz. This group may be considered to have a low Q because the amount of frequencies that pass through the circuit. Example B.) The center frequency in this example is still 5khz but the band width is from 2.5khz to 7.5khz. As you can see the band width in example B is narrower. This would be known as a High Q Circuit. In example A it is a more broad of a band width than B which means A has a lower Q than B which has a higher Q or sharper band width. In relation to the guitar the tone control is a filter. The lower the Q, the wider band of frequencies going through and the higher the Q the sharper the band of frequencies. For this example will drastically alter the difference of the tone control and what frequencies it affects. I hope this is helpful in understanding a Q filter. Deeper discussion can be found online or in electronics text books. Look under AC Circuits, Filters, Tune Circuits and this will give you more detail and graphical examples of what I am trying to explain. Again, hope this helps. |
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tdmckee1961 |
Q Filter on Tele's | #89 | ||
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Posts: 1 Mon, Nov 30, 2009 02:08:49 |
I have two Tele guitars. They are both wired the same and use a Stew-Mac 5-Way/4 pole Super Switch. One the first guitar I have Lawrence 200's for both
the neck and bridge and want to switch to the 298 for the bridge to get an overdriven sound. However, I also want the ability to have a non-driven sound from
the bridge (a la the 200's) and thought a Q Filter could accomplish that. Will I get what I am looking for with the 298 and Q Filter?
My second question is: How do I wire the filter for just the bridge pickup (leaving the neck pickup alone) and also maintain the master Tone control? I am thinking I need a concentric Tone pot to leave the master tone in the circuit for both PUP's and also give me the ability to have a pot control for the Q Filter. How do I wire the Q Filter to the existing circuit? I am thinking I connect the white lead of the Q Filter to the 5 way switch where the bridge PUP is connected and the black to the back of the Tone pot? Correct? Also, if I want to add the cap & resistor, where do they connect in the circuit? |
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