Comments on: The Presence Control http://billmaudio.com/wp Small amps, big sound. Wed, 08 Sep 2010 00:19:31 -0400 hourly 1 http://wordpress.org/?v=3.0.1 By: bill http://billmaudio.com/wp/?page_id=72&cpage=1#comment-12402 bill Sat, 28 Aug 2010 14:45:39 +0000 http://billmaudio.com/wp/?page_id=72#comment-12402 The vast majority of the resistors on the Blues Junior are 1/4 watt. The plate resistors are 1/2 watt--slightly larger and fatter. Compare your resistor to the ones on the board. Most pedals use 1/4 watt and 1/8 watt resistors. The vast majority of the resistors on the Blues Junior are 1/4 watt. The plate resistors are 1/2 watt–slightly larger and fatter. Compare your resistor to the ones on the board. Most pedals use 1/4 watt and 1/8 watt resistors.

]]> By: dennis sipe http://billmaudio.com/wp/?page_id=72&cpage=1#comment-10682 dennis sipe Mon, 09 Aug 2010 20:45:14 +0000 http://billmaudio.com/wp/?page_id=72#comment-10682 Bill, I have standby switch mod, and the basic mods for my son's cream BJ. Also did twin reverb mod. I'm going to get the clean boost and a new volume knob and new capacitors. I have two questions: Do you like the dryer sound of a cream board with the extra headroom mod and do you think it is a bad idea to use only a stereo foot switch to engage and disengage the clean boost. I'm kind of lost in the thread about the pot variations on the prescience knob. Is the prescience control working for most people just fine? thanks dennis Bill,
I have standby switch mod, and the basic mods for my son’s cream BJ. Also did twin reverb mod. I’m going to get the clean boost and a new volume knob and new capacitors. I have two questions: Do you like the dryer sound of a cream board with the extra headroom mod and do you think it is a bad idea to use only a stereo foot switch to engage and disengage the clean boost. I’m kind of lost in the thread about the pot variations on the prescience knob. Is the prescience control working for most people just fine?
thanks
dennis

]]> By: bill http://billmaudio.com/wp/?page_id=72&cpage=1#comment-8457 bill Sat, 03 Jul 2010 03:41:57 +0000 http://billmaudio.com/wp/?page_id=72#comment-8457 There are both 10K and 50K (with the resistor that reduces it to 25K) versions out there. Some people find the 50K to work well, others don't. I'm switching back to the 10K. There are both 10K and 50K (with the resistor that reduces it to 25K) versions out there. Some people find the 50K to work well, others don’t. I’m switching back to the 10K.

]]> By: Robert M http://billmaudio.com/wp/?page_id=72&cpage=1#comment-8342 Robert M Thu, 01 Jul 2010 05:24:45 +0000 http://billmaudio.com/wp/?page_id=72#comment-8342 Thank you Bill for the answer. What do you think is the reason some people experience different behaviour? Do we have different versions of the pot? Thank you Bill for the answer. What do you think is the reason some people experience different behaviour? Do we have different versions of the pot?

]]> By: bill http://billmaudio.com/wp/?page_id=72&cpage=1#comment-8333 bill Thu, 01 Jul 2010 02:36:49 +0000 http://billmaudio.com/wp/?page_id=72#comment-8333 The presence control with the switch is only available in 10K and 50K values. 25K linear would be ideal. The resistor reduces the value of the 50K pot to about 25K but it also makes it nonlinear. All of the tones are available, but they get compressed. Perhaps I'll switch back to 10K. The presence control with the switch is only available in 10K and 50K values. 25K linear would be ideal. The resistor reduces the value of the 50K pot to about 25K but it also makes it nonlinear. All of the tones are available, but they get compressed. Perhaps I’ll switch back to 10K.

]]> By: Robert M http://billmaudio.com/wp/?page_id=72&cpage=1#comment-8245 Robert M Tue, 29 Jun 2010 18:05:44 +0000 http://billmaudio.com/wp/?page_id=72#comment-8245 I got the basic mod kit and presence control kit today and installed it. basic mod kit was good but the presence control is kind of a dissapointment for me. I experience the same problem as Eric and DaveG: nothing happens in sound from 7 o-clock until 3. It's more of a three way switch 1.(7 to 3 o-clock) nothing 2.(3 to 4 o-clock) little more presence 3.(5 o-clock) Too much presence. I have read about good jazz sound on this site and some great feedback on the presence control. That's why I'm dissapointed. I measured the resistance on the pot and found 2.4 ohm when pot is in highest level (5 o-clock). When I turn the knob down the resistance seems to go zero all the way down to 7 o-clock. Is it broken? What is the small resistor soldered on the pot? I really hope there is a solution for this. BR Robert I got the basic mod kit and presence control kit today and installed it. basic mod kit was good but the presence control is kind of a dissapointment for me. I experience the same problem as Eric and DaveG: nothing happens in sound from 7 o-clock until 3. It’s more of a three way switch 1.(7 to 3 o-clock) nothing 2.(3 to 4 o-clock) little more presence 3.(5 o-clock) Too much presence.
I have read about good jazz sound on this site and some great feedback on the presence control. That’s why I’m dissapointed.
I measured the resistance on the pot and found 2.4 ohm when pot is in highest level (5 o-clock). When I turn the knob down the resistance seems to go zero all the way down to 7 o-clock.
Is it broken?
What is the small resistor soldered on the pot?

I really hope there is a solution for this.

BR Robert

]]> By: bill http://billmaudio.com/wp/?page_id=72&cpage=1#comment-8138 bill Mon, 28 Jun 2010 01:11:07 +0000 http://billmaudio.com/wp/?page_id=72#comment-8138 I'm hoping to find a different taper for the control. I'm researching options. I’m hoping to find a different taper for the control. I’m researching options.

]]> By: Eric http://billmaudio.com/wp/?page_id=72&cpage=1#comment-8058 Eric Sat, 26 Jun 2010 16:30:09 +0000 http://billmaudio.com/wp/?page_id=72#comment-8058 I recently installed basic mod kit, recap kit, T020 trans, twinstack mod, input jack, & presence control. Am extremely impressed & happy with the improvement in sound and sensitivity, but am experiencing same effect as DaveG regarding presence control, from 7 o-clock to 3 o-clock no difference in tone whatsoever, presence kicks in only from 3 to 5 o-clock. Have tried every variation of treble, mid, & bass constrols with no difference in presence control response. What think? I recently installed basic mod kit, recap kit, T020 trans, twinstack mod, input jack, & presence control. Am extremely impressed & happy with the improvement in sound and sensitivity, but am experiencing same effect as DaveG regarding presence control, from 7 o-clock to 3 o-clock no difference in tone whatsoever, presence kicks in only from 3 to 5 o-clock. Have tried every variation of treble, mid, & bass constrols with no difference in presence control response. What think?

]]> By: bill http://billmaudio.com/wp/?page_id=72&cpage=1#comment-7359 bill Mon, 14 Jun 2010 17:03:43 +0000 http://billmaudio.com/wp/?page_id=72#comment-7359 It should darken the tone as well, but the treble control can override it. It should darken the tone as well, but the treble control can override it.

]]> By: DaveG http://billmaudio.com/wp/?page_id=72&cpage=1#comment-7150 DaveG Fri, 11 Jun 2010 13:15:38 +0000 http://billmaudio.com/wp/?page_id=72#comment-7150 I finally got this one installed. Everything went well, but I find that the control really only has an effect at the very end of its range. While it does seem to get very bright and crisp at the far end, I'm not really hearing any sort of jazzy muffled tone at the other end. Is this pretty much the expected behavior? thanks! I finally got this one installed. Everything went well, but I find that the control really only has an effect at the very end of its range. While it does seem to get very bright and crisp at the far end, I’m not really hearing any sort of jazzy muffled tone at the other end. Is this pretty much the expected behavior?

thanks!

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