tag:blogger.com,1999:blog-6847048658257278783.post855823497803544474..comments2024-03-27T15:26:01.893+00:00Comments on Guitar FX Layouts: Keeley 4-Knob CompressorIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger342125tag:blogger.com,1999:blog-6847048658257278783.post-62580941486918750652021-03-07T14:51:07.957+00:002021-03-07T14:51:07.957+00:00Use a common 3PDT stomp switch like you can find o...Use a common 3PDT stomp switch like you can find on eBay, Amazon or online sellers like Tayda. The switch is wired up as per the diagram here:<br /><br />https://tagboardeffects.blogspot.com/2012/02/offboard-wiring.html<br /><br />It shows the LED wiring tooIvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-85240039438792990832021-03-07T14:46:44.017+00:002021-03-07T14:46:44.017+00:00Hi, I’m new to pedal building. What kind of stomp ...Hi, I’m new to pedal building. What kind of stomp switch does this build need? Where does an LED go?Creaverhttps://www.blogger.com/profile/09272296751824899788noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-30154653164589531352021-03-07T14:46:42.443+00:002021-03-07T14:46:42.443+00:00Hi, I’m new to pedal building. What kind of stomp ...Hi, I’m new to pedal building. What kind of stomp switch does this build need? Where does an LED go?Creaverhttps://www.blogger.com/profile/09272296751824899788noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-33356300419779427912020-12-15T07:37:31.452+00:002020-12-15T07:37:31.452+00:00Built this FOUR times now, works great!
https://h...Built this FOUR times now, works great!<br /><br />https://hgecontraptions.blogspot.com/2014/09/keeley-4-knob-compressor.html<br />https://hgecontraptions.blogspot.com/2016/06/keeley-4-knob-compressor-clone.html<br />https://hgecontraptions.blogspot.com/2017/02/keeley-4-knob-comp-clone-third-one.html<br />https://hgecontraptions.blogspot.com/2019/08/hge-contraptions-custom-6in1-pedal.htmlHGE Contraptionshttps://www.blogger.com/profile/13124050879741157587noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-80475810877015654202020-12-03T23:02:09.235+00:002020-12-03T23:02:09.235+00:00I used B1M lin. and soldered 1M resistor between 2...I used B1M lin. and soldered 1M resistor between 2-3 pins. perfect log. pot. :)emrahmanhttps://www.blogger.com/profile/08447416403279328495noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-28531276597912145842020-02-28T10:39:56.140+00:002020-02-28T10:39:56.140+00:00Hi! Sorry for english...
Built this one, it sounds...Hi! Sorry for english...<br />Built this one, it sounds, but have a problem. When i roll C500k pot in middle it mutes sound. What is the problem?Todorovhttps://www.blogger.com/profile/16914712895211698628noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-61604659105260278642019-05-25T06:36:23.998+01:002019-05-25T06:36:23.998+01:00MAO GOD BLESS, THANKS FOR YOUR PATIENCE... I WAS C...MAO GOD BLESS, THANKS FOR YOUR PATIENCE... I WAS CHECKING THE LAST GROUP OF STUFF YOU SAID TO CHECK AND WAS LOOKING AT LAYOUT AND JUST BY PURE LUCK I CAUGHT THE PROBLEM.. THE 1UF CAP RIGHT UNDER THE LEFT SIDE OF IC WAS SUPPOSED TO BE SOLDERED IN HOLE 8 AND 10 FROM THE TOP.. I HAD IT IN 8 AND 9... I CORRECTED IT AND THE PEDAL WORKS AMAZING... SUPER QUIET AND ALOT OF SQUASH... JUST WHAT I WANTED.. I ALREADY HAVE A EMPRESS COMPRESSOR WHICK IS THE BEST PEDAL I EVER HEARD GREAT FOR ALWAYS ON KINDA OF THING.. NOT REAL SQUASHY THOUGH... MY EGO COMPRESSOR WAS NOISEY AND HAD A LOT OF HUM SO I GOT RID OF IT.... THIS LAYOUT IS AMAZING.. IT'S SUPER SQUASH AND VERY QUIET.. AMAZING LAYOUT.... IM EXTREMELY HAPPY RIGHT NOW.... THANKS AGAIN FOR EVERYTHING... I WENT OVER LAYOUT 10 TIMES AND COULDN'T FIND ANYTHING... FOR SOME REASON CHECKING WHAT YOU JUST ASKED ME TO CHECK PUT MY EYES IN THE RIGHT SPOT... I DON'T THINK I WOULD HAVE EVER FOUND IT WITHOUT YOUR HELP... THANKS AGAIN.. YOUR THE BEST.... Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-53943129620362633522019-05-24T04:57:16.874+01:002019-05-24T04:57:16.874+01:00Al, just had a thought.
Did you use a 500k reve...Al, just had a thought. <br /><br />Did you use a 500k reverse log pot (Type "C") for the Sustain? And wire up just lugs 2 and 3 per the layout? (lug 1 can be either not connected, or tied to lug 2)<br /><br />With no power and the IC removed, and with the Sustain pot turned down, you should read around 527k from Q5-E to IC socket 5. As you turn up the Sustain pot, the resistance should quickly move towards the 27k at full clockwise. <br /><br />Also, double check the 27k resister value at IC pin 5. You can also replace the 27k with a lower value, like 15k.<br /><br />The lower the resistance from Q5 emitter to IC pin 5, the more sustain and volume (and noise).<br /><br />(Haven't had a chance to dig out my Keeley clone, hope to this weekend) <br /><br />MAOhttps://www.blogger.com/profile/16009444316767677263noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-14306627007133107262019-05-22T04:11:33.510+01:002019-05-22T04:11:33.510+01:00All the way down(counter clockwise) is 174.8 and a...All the way down(counter clockwise) is 174.8 and all the way up (clockwaise) is 0 (I questioned this in an earier message... the layout said use lug 2 & 3... If I would have used lug 1 & 2 them all the way down would be 0 and all the way up would be 174.8... so pot works fine, it just functions backwards using lug 2 & 3.... I used a 200k pot so the 172.8 is the top resistance for that pot... So when I tried it with guitar and amp, the clipping all the way up or down there was no sudible volume difference... I'm stumped... it's like something is reducing the level or not increasimg the level.. depending how this circuit works.. And I have know clue how much the clipping pot would effect the volume.. could it be the output section where it's losing volume??? thanks again your the best I really appreciate your help with this.... <br /> Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-48768592685379699882019-05-22T03:41:11.582+01:002019-05-22T03:41:11.582+01:00ok, that's better. Those readings are probably...ok, that's better. Those readings are probably ok. <br /><br />Pin 2 and Pin 3 to ground 255k might be correct since we are measuring in circuit.<br /><br />Measure from the 1U again to socket 2 with the Clip control all the way down, then all the way up. All the way down should be zero ohms, all the way up 150k (or whatever value you used for the Clip control).<br /><br />If that checks out, then the input signal is probably ok. And I'm going to need to find an old build of mine so we can proceed. <br /><br />MAOhttps://www.blogger.com/profile/16009444316767677263noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-5742353504520545552019-05-21T23:34:58.164+01:002019-05-21T23:34:58.164+01:00THE LAST MESSAGE I SENT CORRECTED INFO... I FORGEO...THE LAST MESSAGE I SENT CORRECTED INFO... I FORGEOT TO INCLUDE <br /><br />PIN 2 TO GROUND IS 255.6K<br /><br />PIN 3 TO GROUND IS 255.5K ( YOU HAD SAID YOU THOUGH THESE WOULD BE CLOSER TO 500K.... <br /><br />THIS AND THE PREVIOUS MESSAGE IS ALL THE CORRECT INFORMATION YOU ASKED FOR.... AGAIN THANKS SO MUCH... HOPEFULLY THE CORRECT READING WILL GIVE YOU A CLUE TO WHAT'S GOING ON... LIKE I SAID YOUR THE BEST IT'S SO COOL YOUR HELPING ME ...Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-26872990386366310202019-05-21T23:23:07.658+01:002019-05-21T23:23:07.658+01:00HI MAO I'M SORRY I DID THE TESTING WRONG THE P...HI MAO I'M SORRY I DID THE TESTING WRONG THE PEDAL WAS POWERED AND IT I GAVE YOU VOLTAGES NOT RESISTANCE... HERE'S THE PROPER NUMBERS WITH THE PEDAL OFF AND RESISTANCE... SORRY..<br /><br />IC RESISTANCE BETWEEN PIN 2 AND 3 IS 1.99K<br /><br />RESISTANCE BETWEEN 1UF CAP AND PIN 2 IS 172.8K (YOU SAID IT SHOULD BE ZERO..<br /><br />RESISTANCE BETWEEN 1UF CAP AND PIN 3 IS 174.8K<br /><br />HOPEFULLY THE RIGHT INFO WILL LEAD US TO HOW TO FIX THIS ISSUE..<br />THANKS SO MUCH I'M SORRY FOR SENDING THE WRONG INFO.. YOUR THE BEST.. Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-69382959499331336852019-05-21T06:04:34.522+01:002019-05-21T06:04:34.522+01:00ok, we may be on to something, this doesn't se...ok, we may be on to something, this doesn't seem right:<br /><br />From IC Socket 2 to ground is 4.84<br />From IC Socket 3 to ground is 4.84<br /><br />I would think resistance to ground at those sockets should be much higher, like 500k. <br /><br />And I would think you should read some small resistance (like 2k) from top of 1u to socket 3.<br /><br />No power applied to the circuit when checking resistances, correct?<br /><br />With the IC still removed, and no power applied, check resistance between socket 2 and socket 3. I think it should be around 2k. If it's 1k, check the cut to the left of pin 2. If it reads zero(shorted), then you have a short somewhere around pin 2 or pin 3. <br /><br />If that all checks out ok, you can also rule out problems with the low pass filter network at pin 3 by removing the 1uf cap directly below the socket 4 (or just lift either of it's legs). Then reinstall the IC and apply power. Compressor should still work, just wont have the low pass filter in the circuit. If symptoms are the same, the low pass filter is ok. If symptoms change, let us know what happens. <br />MAOhttps://www.blogger.com/profile/16009444316767677263noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-60224859845495004722019-05-21T05:26:03.876+01:002019-05-21T05:26:03.876+01:00Thanks so much MAO...
From IC Socket 2 to ground...Thanks so much MAO... <br /><br />From IC Socket 2 to ground is 4.84<br />From IC Socket 3 to ground is 4.84<br /><br />From top of 1uf Cap near clip 3 connection to IC Socket 2 is 0<br />it is the same for cap to socket 3 "0"<br /><br />I wasn't sure how to check 1M resistor to pin 2 and 3 I tried what I though made sense from end of resistor that lead to 2 and from end of resistor that lead to 3 and both were "0"<br /><br />Hopefully this gets us closer to figuring this out...lol... thanks again for your help... I'm still learning..Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-46869916233735470092019-05-19T22:37:51.625+01:002019-05-19T22:37:51.625+01:00Those voltages look ok to me.
And based on your...Those voltages look ok to me. <br /><br />And based on your comments, it sounds like everything is working except that the output is low...strange. <br /><br />My gut tells me the input signal is somehow being reduced early on. <br /><br />I think you did mention the Clip control doesn't have much of an affect. If you haven't already done so, I'd focus on that area for now. <br /><br />Pull the IC, then double check the 1M resistor values at pin 2 and pin 3. <br />Then measure from pin 2 to ground, then pin 3 to ground. I think both should read the same. (Wont be 1M)<br />Then with the Clip control turned all the way down, measure from the top of the 1uf cap (near the Clip 3 connection) to pin 2 of the IC socket, should be zero resistance. <br />Then measure from top of 1U to pin 3, should be 2k.<br /><br />That should tell us if something is up at the input.<br /><br />I may have an old build in my scrap pile, if so I will audio probe it to see what happens with the gain throughout the circuit. <br />MAOhttps://www.blogger.com/profile/16009444316767677263noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-21175073189856758722019-05-18T20:42:11.860+01:002019-05-18T20:42:11.860+01:00Can anybody help me trouble shoot my Keeley 4-Knob...Can anybody help me trouble shoot my Keeley 4-Knob Compressor Build?? The pedal works it's quiet with no distortion.. The problem I'm having is the Level has to be all the way up and the Sustain has to be at 3o'clock to get unity gain.. I'm getting good compression at this setting and the Attack knob works... The Clipping doesn't seem to change anything.. Here are my voltages of IC and Transistors.. If anybody can tell me what the proper voltages should be so I know where to start looking it would be a big help...<br /><br />IC LM3080:<br /><br />1= 2.42, 2= 4.66, 3= 4.66, 4= 0, 5= .643, 6= 2.79, 7= 9.39, 8= 0<br /><br />TRANSISTORS 2N5088<br /><br />Q1= E 1.844 B 2.246 C 7.55<br />Q2= E 2.242 B 2.78 C 7.13<br />Q3= E 0 B 0 C 9.15<br />Q4= E 0 B 0 C 9.15<br />Q5= E 8.76 B 9.15 C 9.38<br /><br />ANY HELP WOULD BE GREATLY APPRECIATED, THANKS Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88254485702654260212019-05-17T05:48:21.323+01:002019-05-17T05:48:21.323+01:00Hi MAO, Changing the pot did not work... as far as...Hi MAO, Changing the pot did not work... as far as controls the sustain has to be at 3o'clock and the level all the way up to get unity gain.. but I'm getting some nice compression from the sustain control.. and the Attack control works properly as I turn up the attack it allows more transients through as it should.. he are the voltages I got... <br /><br />LM3080: 1= 2.4 2=4.66 3=4.66 4=0 5=.643 6=2.79 7=9.39 8=0<br /><br />TRANSISTORS:<br /><br />Q1) E=1.844 B=2.246 C=7.55<br />Q2) E=2.242 B=2.78 C=7.13<br />Q3) E=0 B=0 C=9.15 <br />Q4) E=0 B=0 C=9.15<br />Q5) E=8.76 B=9.15 C=9.38<br /><br />Hopefully this will help figure out whats wrong.... Thanks MAO I hope you can give me a clue to what's going on... I changed the IC and got pretty much the same readings... I do have a socket n.. soldered in for the IC.. hope to hear from you soon. thanks again for all your help... Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-33795305842271138762019-05-16T06:33:37.133+01:002019-05-16T06:33:37.133+01:00I THINK I FOUND OUT WHAT IT IS... THE 50K LINEAR P...I THINK I FOUND OUT WHAT IT IS... THE 50K LINEAR POT READS 52K ONE WAY AND THE OTHER 32K... IT'S FAULTY IT NEVER REACHES ZERO RESISTANCE... I CHECKED MY OTHER ONE FROM TAYDA AND IT'S BAD ALSO... LUCKILY I HAD SOME FROM SMALL BEAR AND IT READS PERFECT GOES FROM ZERO TO FULL RESISTANCE... I NEVER GOT A BAD POT FROM TAYDA BEFORE BUT I NOW HAVE 2 THE LAST ONES THEY SENT... DOES THIS SOUND LIKE IT WOULD BE THE PROBLEM... THE POT ON THE PEDAL FOR LEVEL ALWAYS HAS RESISTANCE 52K ONE WAY AND 32K THE OTHER... IF YOU THINK THIS IS IT, I'LL JUST CHANGE THE POT FIRST.. HOPEFULLY IT WORKS.. THANKS AGAIN MY FRIEND...Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-49225702253865186592019-05-16T05:31:53.439+01:002019-05-16T05:31:53.439+01:00Everything is wired exactly like the layout... I t...Everything is wired exactly like the layout... I took my time, did the cuts and links one night, double and triple checked all perfect.. I did the same with components, One night for resistors, triple checked.. One night for diodes and transistors, triple checked.. And one night for caps and ic, triple checked.. And one night for wiring, triple checked.. So everything is exact... I purchased the LM3080 from www.surplus-electronics-sales.com, the only place that had it... I will get you the voltages in next post... I just have some questions about stuff I chacked... first thing was linear pots for Attack and Clippin... the layout said both were using lug 2 & 3 and nothing on 1.. they are alpha pots. 200k Linear.. when I measured resistance on lug 2 and 3 all the way counter clockwise(left) was full resistance 169k and fully clockwise (right)was 0 resistance.. So that meants when pots are off fully counter clockwise it full resistance about 169k.... When I measure Lugs 1 & 2 that seem to my mind all the way counter clockwise (left) is zero And all the way clockwise (right) is full resistance.. but the layout says use lug 2 & 3.. I just want to make sure with the pots off it's suppose to be full resistance, because wiring to lug 2&3 it's full resistance off, It it was lug 1&2 it would be zero resistance in off position (all the way counter clockwise) Ill figure out how to check the voltages on IC and transitors meanwhile... unless it's something you can easily instruct me how to do it.... I seem other post where there was a similar problem... the sustain acted more like a volume, but nobody anwered the issue.. if I don't hear from you by tomorrow I'll just look up how to check and give you the voltages.. thanks for the help, I really appreciate it... Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-30633877202854843822019-05-16T02:53:21.079+01:002019-05-16T02:53:21.079+01:00Either the LM or CA would be fine, assuming they a...Either the LM or CA would be fine, assuming they are legit. <br /><br />Where did you purchase yours?<br /><br />Tough to diagnose without voltage readings. You may want to start a troubleshooting thread in the forums. <br /><br />In the meantime, are you getting compression? <br /><br />Does the Sustain control alter the release time? <br /><br />Does the Attack control alter the response? With the Attack all the way down, strum hard and it should clamp down very quickly, and a much slower response with the Attack all the way up (or visa versa depending on how you wired up the control) <br /><br />You could also try shuffling the transistors to see if anything changes. <br /><br />If you did purchase the LM3080 from a known source, you should probably post the voltage readings at the IC and transistors. <br />MAOhttps://www.blogger.com/profile/16009444316767677263noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-26084563634801588182019-05-16T00:26:07.076+01:002019-05-16T00:26:07.076+01:00the clip and attack are all the way down... I buil...the clip and attack are all the way down... I built the version with the 2 1k resistors. The clip does not really alter the volume. I had it all the way down and tried all the way up, still it takes the level all the way up and sustain at 3o'clock to get unity gain.. I also used the LM3080 as listed in the layout. I see a lot of people talking about the CA3080 but that's not what's listed on the layout diagram... hopefully this is a easy fix. thanks so much.. "just realized there was a reply button..lol thanks so much Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-48628232029121089132019-05-16T00:18:29.574+01:002019-05-16T00:18:29.574+01:00I also used the LM3080 the layout listed... I see ...I also used the LM3080 the layout listed... I see everybody talking about the CA3080 but the layout said LM3080 so that's what I used.. just wanted to add this so you know what I used... Hopefully this is an easy adjustment to get the input level fixed....thanks Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-36785284300030797712019-05-15T14:43:37.829+01:002019-05-15T14:43:37.829+01:00The clip and attack are all the way down... I buil...The clip and attack are all the way down... I built the version with the 2 1k resistors... the clip does not really alter the volume.. I had it all the way down, and tried all the way up... still it take sustain at 3 o'clock and level all the way up to get unity gain... Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-56192029411661688602019-05-15T12:19:32.500+01:002019-05-15T12:19:32.500+01:00Does the Clip control alter the maximum volume? Tu...Does the Clip control alter the maximum volume? Turning the Clip all the way down should give maximum input signal. Turning it up will reduce the input signal. <br /><br />Which layout did you build? The 2k trimmer version or the two 1k resistors?MAOhttps://www.blogger.com/profile/16009444316767677263noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-32069391061138254742019-05-15T09:56:52.430+01:002019-05-15T09:56:52.430+01:00Hi MAO if your around... I need help.. I finished ...Hi MAO if your around... I need help.. I finished the Keeley 4-knob compressor and everything is good except one thing.. I have to have level all the way up and sustain at 3/4 the way up to get unity gain.. the pedal sounds clean.. If I turn the sustain to 9 o'clock can bearly hear it... I do not have high out put pick ups. Probably average to low range.. everything is crystal clear no distortion... How do I increase input of pedal.. I have no problems with any pedals I've bought Like Empress Compressor, Wampler Ego Compressor and any other pedal.. the only time I got low output was on a talons overdrive I built.. I swapped out leds for germanium diodes and input volume dropped had to have level all the way up to get unity gain.. so I put leds back in because that's what the circuit was designed for and my overdrive works perfectly... What would cause the input level to be so low on this Keely 4-knob compressor.. Sound wise it's good and clean, no distortion... But like I said level has to be all the way up and Sustain has to be at 3 o'clock to get unity gain... please help.. thanks.. Al Batchelorhttps://www.blogger.com/profile/05903155565105794686noreply@blogger.com