tag:blogger.com,1999:blog-5481402030233340127.post2172100839442406643..comments2024-03-28T17:24:07.520-04:00Comments on Perf and PCB Effects Layouts: Music Man Sabre II Bass Preampdtgehringhttp://www.blogger.com/profile/09555201436004501222noreply@blogger.comBlogger17125tag:blogger.com,1999:blog-5481402030233340127.post-91444645288059102102024-03-15T14:25:48.116-04:002024-03-15T14:25:48.116-04:00This comment has been removed by the author.Juan Gamezhttps://www.blogger.com/profile/08189619228030480849noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-53180101140928582352021-09-07T21:11:31.600-04:002021-09-07T21:11:31.600-04:00Este capacitor amarelo e de cerâmica ou tantalo ??...Este capacitor amarelo e de cerâmica ou tantalo ???JR NUNEShttps://www.blogger.com/profile/05154488496162494023noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-46350455352363487542021-07-06T04:52:36.778-04:002021-07-06T04:52:36.778-04:00Hi! I tried this circuit without luck (2 months ag...Hi! I tried this circuit without luck (2 months ago) and Stingray with more luck (2 of my basses have ir now. After that, I started to layout some preamps for my basses and some pedals, and I uploaded this one based in your way of drawing layouts. https://selftaughtcreativity.wordpress.com/2021/07/06/sr-480-bass-preamp-pcb-layout/.<br />I hope you like it, feel free to share if you like or tell me if you need something. I'll try to post some more layouts, AMPEG SVT Bajaman, Stingray 3EQ, etc...VLTRAhttps://www.blogger.com/profile/08709005646199986248noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-40690805138716429982020-11-18T06:10:13.332-05:002020-11-18T06:10:13.332-05:00do your have a sound or video demo for this pedal?...do your have a sound or video demo for this pedal?Anonymoushttps://www.blogger.com/profile/12909831595553731850noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-32866494126624852762020-09-21T19:13:27.887-04:002020-09-21T19:13:27.887-04:00I use LT1354 and run it at 18vI use LT1354 and run it at 18vFunkManhttps://www.blogger.com/profile/18207143981540857135noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-63943927931602240212020-05-15T16:21:58.409-04:002020-05-15T16:21:58.409-04:00With 1.5MΩ on pin 8, the op amp has a GBW of 180KH...With 1.5MΩ on pin 8, the op amp has a GBW of 180KHz, slew rate of 0.1V/µs, and quiescent current of about 30µA. There are lots of op amps that meet these specs. However, it's nearly impossible nowadays to find them in the nearly-obsolete DIP-8 package. I did a search across many manufacturers and only found one op amp that is still produced and has similar specs to a LM4250 with a 1.5M programming resistor to ground at a 9V supply.<br /><br />This op amp is the LT1636CN, from Analog Devices. It has slightly higher power consumption (45µA vs 30µA) but otherwise should be pretty similar.nedkonzhttps://www.blogger.com/profile/11540080423503034534noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-16636750396000125882019-08-14T22:37:41.454-04:002019-08-14T22:37:41.454-04:00I guess that´s just for having the minimum power c...I guess that´s just for having the minimum power consumption. The Resistor that "programs" the OpAmp is the 1M5 one in Pin 8, wich in common OpAmps has no connection.<br />so, I just guess that in using a 741, 071 or whatever, everything should be the same, exept for that resistor in Pin 8, wich should not be.Flaconsiushttps://www.blogger.com/profile/06737032731094906124noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-84078631769103591042019-08-14T22:34:19.894-04:002019-08-14T22:34:19.894-04:00I´ve seen that it is like a single OpAmp (LM741, T...I´ve seen that it is like a single OpAmp (LM741, TL071 and so meny others) but, it is a PROGRAMMABLE OpAmp. The Datasheet says that the "Programmable" thing is because "A single external<br />master bias current setting resistor programs the input bias<br />current, input offset current, quiescent power consumption,<br />slew rate, input noise, and the gain-bandwidth product".<br />Flaconsiushttps://www.blogger.com/profile/06737032731094906124noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-1945435497702210642019-08-02T12:27:13.432-04:002019-08-02T12:27:13.432-04:00input cap is 1uF and output is 10uFinput cap is 1uF and output is 10uFFunkManhttps://www.blogger.com/profile/18207143981540857135noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-49280017529955773652019-07-25T12:12:41.334-04:002019-07-25T12:12:41.334-04:00Check out the support documents from your pickup&#...Check out the support documents from your pickup's manufacture. They should have some sort of wiring diagram. And whatever wire from the pickup goes to the volume pot (to one of the lugs, not the ground wires to the back of the pot) will go to the input of the preamp circuit boardEffects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-60513144612975322952019-07-25T12:02:14.316-04:002019-07-25T12:02:14.316-04:00no friend, I'm not ... I never called pickups ...no friend, I'm not ... I never called pickups in my life ... help me if you can, thanks ...JJMarqueshttps://www.blogger.com/profile/05098397149003419423noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-62749450236500869282019-07-22T19:16:57.059-04:002019-07-22T19:16:57.059-04:00Google’s your friend there. Not familiar with that...Google’s your friend there. Not familiar with that pickupEffects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-76838909133986808962019-07-22T19:15:35.032-04:002019-07-22T19:15:35.032-04:00my pickup is a mmpro cabrera, so it has 4 wires .....my pickup is a mmpro cabrera, so it has 4 wires ... what would be their positive?JJMarqueshttps://www.blogger.com/profile/05098397149003419423noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-19012812227151714552019-07-22T18:54:40.123-04:002019-07-22T18:54:40.123-04:00Positive wire from the pickup goes to the In pad, ...Positive wire from the pickup goes to the In pad, Out pad goes to the jack. Effects Layoutshttps://www.blogger.com/profile/11341183658959824998noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-79132751496053804442019-07-22T18:26:53.392-04:002019-07-22T18:26:53.392-04:00how do i use it onboard?how do i use it onboard?JJMarqueshttps://www.blogger.com/profile/05098397149003419423noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-77580057605485884972019-07-22T18:22:04.999-04:002019-07-22T18:22:04.999-04:00What replacement do you recommend for the LM4250?What replacement do you recommend for the LM4250?JJMarqueshttps://www.blogger.com/profile/05098397149003419423noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-1296838609817132462019-07-09T21:16:11.535-04:002019-07-09T21:16:11.535-04:00thanks for this awesome layout.. kudos.. 😄thanks for this awesome layout.. kudos.. 😄jandalesandshttps://www.blogger.com/profile/00462306622137008848noreply@blogger.com