tag:blogger.com,1999:blog-3465922128874862400.post5822151140361925560..comments2024-02-19T17:26:07.448-08:00Comments on Coda Effects: Black Hole : Sunn Model T preampCoda Effectshttp://www.blogger.com/profile/11269924772680602439noreply@blogger.comBlogger29125tag:blogger.com,1999:blog-3465922128874862400.post-65630296930128127882019-02-10T07:56:31.111-08:002019-02-10T07:56:31.111-08:00So in theory just put a buffer pedal after this in...So in theory just put a buffer pedal after this in the effects loop to use it as a preampQuinn301https://www.blogger.com/profile/10533587464677627924noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-57997318306896308442019-01-05T08:20:33.621-08:002019-01-05T08:20:33.621-08:00This comment has been removed by the author.RankoThttps://www.blogger.com/profile/17851674550152263396noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-20240946549016931412018-12-23T12:16:29.758-08:002018-12-23T12:16:29.758-08:00Hello again, thanks for the reply. So I bought a K...Hello again, thanks for the reply. So I bought a Klon Buffer kit from Fuzzdog (pedalparts schematic), only to find the Manticorefx blog post stating majority of diy Klon buffer kits are 'wrong'. I then found your posts about the PCB you made of a correct Klon buffer. :-( Is your PCB still available? Thought |I'd just use the parts from the Fuzzdog kit, your PCB and a couple of replacement parts with correct values. But can't find the pcb in your shop :-(rjc0https://www.blogger.com/profile/16636415577911882219noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-59685159637459432262018-12-20T02:07:43.031-08:002018-12-20T02:07:43.031-08:00I might change the name of it until I adapted it f...I might change the name of it until I adapted it for real preamp use. I think for now the impedance is a bit high for that. However if you have a buffer to put next to it, it is perfectly suitable.<br /><br />I will do more testing on that.<br /><br />I am working on a similar desing for a Supro Amp, PCBs are ready but I am block by the J201 shortageCoda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-21471667686281367722018-12-20T01:10:24.837-08:002018-12-20T01:10:24.837-08:00Hi there, recently bought your JFET loaded PCB to ...Hi there, recently bought your JFET loaded PCB to build but was thinking it was a preamp suitable to feed into the Return of a tube (output half of a 12AX7) buffered FX loop in my amp? So is this V1 really for in front of the amp as a boost/dist/fuzz and the possible V2 version a more suitable design for the FX loop Return? Thank you for the PCB. Have you considered doing the Twin Twelve (Silvertone 1484) project in the same way. http://tagboardeffects.blogspot.com/2017/10/jhs-twin-twelve-v1.html http://effectslayouts.blogspot.com/2017/07/jhs-twin-twelve-v1.htmlrjc0https://www.blogger.com/profile/16636415577911882219noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-24030702186395922332018-07-23T23:17:20.138-07:002018-07-23T23:17:20.138-07:00OK I see what you mean! The original preamp is org...OK I see what you mean! The original preamp is organized like this, after the volume knob goes the phase inverter section of the amp. So I decided to follow closely the original schematic. However, I think it would beneficiate from a real output section. For the v2 (maybe next year), I will add an output section that will allow more output volume at lower gain and lower the output impedance.Coda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-23212171032604185412018-06-25T00:15:35.406-07:002018-06-25T00:15:35.406-07:00I mean the tube with the voltage labels 6 and 7, c...I mean the tube with the voltage labels 6 and 7, comes before the volume (looks like it should be before the power amp), but also after the tonestack. But on yours, you have Q3 and Q4 before the tonestack and then volume. But if we put the tonestack between Q3 and Q4 would that not be closer to the original preamp?BurgerCrisishttps://www.blogger.com/profile/00013276983244566099noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-7278515027577228372018-06-23T06:51:05.164-07:002018-06-23T06:51:05.164-07:00To push it in a power amp, you would need to lower...To push it in a power amp, you would need to lower the output impedance with a buffer. A simple Klon buffer does the job really well.<br /><br />For your second question, the tubes after the tonestack is part of the power amp for instance. So not really necessary here.Coda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-39887591480009323752018-06-23T06:49:44.736-07:002018-06-23T06:49:44.736-07:00No problem to mix voltage. The voltage only indica...No problem to mix voltage. The voltage only indicates the max voltage the capacitor can handle. For guitar pedals, 25V is largely enoughCoda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-48030782607384675322018-05-31T13:31:59.697-07:002018-05-31T13:31:59.697-07:00Hey! This is sweet. Might get into making one of t...Hey! This is sweet. Might get into making one of these later. Do you think that, if pushed into a good power amp, it would sound like a real Model T, with tubes? <br /><br />Also, looking at the original tube schematic, it looks like the tonestack is place somewhat between the two gain tubes! The manner in which looks a little complicated to me, being a novice... Do you think that wiring your tonestack in the middle of the two JFets would be a good idea?BurgerCrisishttps://www.blogger.com/profile/00013276983244566099noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-21128397797970511212018-04-25T07:56:02.865-07:002018-04-25T07:56:02.865-07:00A simple Klon buffer usually does the job really w...A simple Klon buffer usually does the job really well.Coda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-88484443315449054392018-04-15T20:31:59.346-07:002018-04-15T20:31:59.346-07:00What output buffer would you guys recommend? What output buffer would you guys recommend? Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-1443467012233146412018-04-15T20:30:36.435-07:002018-04-15T20:30:36.435-07:00I made your PCB version and it is great! Thanks so...I made your PCB version and it is great! Thanks so much.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-10395636031089745852018-02-18T23:22:27.981-08:002018-02-18T23:22:27.981-08:00The "LDR" part name is actually quite co...The "LDR" part name is actually quite confusing, I was meaning "LeD Resistor", and realize later on it can be confusing! It is just the current limiting resistor for the LED!Coda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-33226346372519299672018-02-16T03:38:51.961-08:002018-02-16T03:38:51.961-08:00Eya! Thnx 4 the lush pedals. Whats the ldr on the ...Eya! Thnx 4 the lush pedals. Whats the ldr on the board/kit list all about? Light dependant resistor...???b6a6r6nhttps://www.blogger.com/profile/11814890188154659539noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-53963831571262488122018-02-12T16:44:09.477-08:002018-02-12T16:44:09.477-08:00Thanks, I bought some Panasonic fc capacitors but ...Thanks, I bought some Panasonic fc capacitors but the 50v 220uf is way to big for the pcb, I see some 25v on ebay that should fit, is it ok to mix and match voltages? The rest of the electrolytic caps i have are 50v...Eesoterichttps://www.blogger.com/profile/08472118507406079681noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-43973135626945262882018-02-08T07:11:59.226-08:002018-02-08T07:11:59.226-08:00Merci !Merci !Coda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-19666792748162623442018-02-03T01:49:01.765-08:002018-02-03T01:49:01.765-08:00No problem at all: all the soldering that you have...No problem at all: all the soldering that you have to do is on the other side of the board. They are also more heat resistant that they seem!Coda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-37315568542299960992018-02-02T15:49:38.611-08:002018-02-02T15:49:38.611-08:00Got mine in the mail a last week, was wondering if...Got mine in the mail a last week, was wondering if there's any concern about soldering near those built-in transistors? Do you have any suggestions for not frying them? This will either be the first or one of the first builds I do, thanks!Eesoterichttps://www.blogger.com/profile/08472118507406079681noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-49418533901590493002018-01-25T04:56:36.134-08:002018-01-25T04:56:36.134-08:00Exactly. For now, the output impedance is not good...Exactly. For now, the output impedance is not good enough to use it as a preamp per se. I am currently testing it at my place, and might add it to the v2.0 if conclusive!Coda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-38776576034079746542018-01-25T04:48:30.988-08:002018-01-25T04:48:30.988-08:00Hi!
I'd better add an output buffer to have a...Hi!<br /><br />I'd better add an output buffer to have a steady impedance source.<br /><br />Nice job btw.plushhttps://www.blogger.com/profile/08263087121719556185noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-32703827054477318232018-01-24T09:46:22.581-08:002018-01-24T09:46:22.581-08:00Yep! Have a look on the build doc ! (link in the s...Yep! Have a look on the build doc ! (link in the sales page here : http://www.coda-effects.com/p/black-hole-pcb.htmlCoda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-33627602032506330102018-01-24T05:54:25.001-08:002018-01-24T05:54:25.001-08:00Do you happen to have a drill template for your en...Do you happen to have a drill template for your enclosure layout? Thanks! Nickolassalokcinhttps://www.blogger.com/profile/16450290054846240759noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-86920430942961310112018-01-05T07:31:33.088-08:002018-01-05T07:31:33.088-08:00OK! If you end up testing the 18V output, let me ...OK! If you end up testing the 18V output, let me know how it works out compared to the 9V! Thanks!Dr. Gorihttps://www.blogger.com/profile/11321079215111811183noreply@blogger.comtag:blogger.com,1999:blog-3465922128874862400.post-20045830824265041502018-01-05T07:12:41.995-08:002018-01-05T07:12:41.995-08:00Hello! I have never tried it... yet! But you are r...Hello! I have never tried it... yet! But you are right, it should be interesting to test it. I can test 18V, but maybe not the 25V because of the 220uF capacitor (small voltage rating in order to have a small footprint)Coda Effectshttps://www.blogger.com/profile/11269924772680602439noreply@blogger.com