Hi. I never built the Dr. Boogie, even if I thought about it many times, as well the DieFet, or the Bogner version or some other jfet emulator. I built directly the Triple Wreck, because in these jfet version often the eq section is not too much versatile or there are noise problems.
I met once a guy with a Dr. Boogie built by a friend, but it had to set it at very low gain, bass and mid at max and treble at min, else it sounded too harsh and fizz. It was nice, but weak, and not even close to a Mesa high gain distortion.
I guessed this kind of high gain emulator are kind of obsolete. Did you still find the Dr. Boogie a good pedal?
Hello again fuzzhead .. I have 1 question .. about pots .. LOG symbol is B and LIN is A here in greece/Europe ... so you , when you say B pot . What kind is it ? Lin or log ?? Because I see it’s different between USA and Europe .. thank you
Generally you want to set the trimmers to half supply voltage, in this case 4,5v. Each trimmer is connected to Drain of Q1 and Q4. Q5 is a buffer so it don't need a trimmer. But some people like a bit higher voltage like 5v but let your ears decide. It can take some time to dial it in but it usually a quite easy process if you have legit J Fets.
So I finish and I disappointed ...it’s working . But it doesn’t have the wow gain ,,, it have some gain between Marshall 1974x and fender vibroverb 1964 ... ahah ahah , no it’s joke , I dialling those trimmers for an hour but the max gain isn’t max .. :( ... I use for diode the 1N5818. It’s the same right ? And tomorrow I check the voltages
I check my battery and is bad . I replace with other ( not new but relatively good ) and the sound it’s better ... but I think to put 9v adapter for sure . Tomorrow I check the voltage . You say with 4.5v on Drain Is good . So I check all the Drain pins without the jfets or with ?
I put on the board 9v adapter and I redialling the trimms..... sounds amazing and the gain kick is like tube distortion ..... thank you fuzzhead . It’s amazing pedal
I have 1 more question fuzzhead ( never end for questions !!?!?) so I put adapter on board , but now I see , my 9 volt adapter is 0.6 ampere and the 9volt battery is 1 ampere.... it”s problem ? May I try with 1ampere adapter to see difference
You can verify this, sounds amazing and spot on. Thanks for making a layout that fits in a 1590B.
ReplyDeleteGreat! I'll tag it right away!
DeleteHi.
ReplyDeleteI never built the Dr. Boogie, even if I thought about it many times, as well the DieFet, or the Bogner version or some other jfet emulator. I built directly the Triple Wreck, because in these jfet version often the eq section is not too much versatile or there are noise problems.
I met once a guy with a Dr. Boogie built by a friend, but it had to set it at very low gain, bass and mid at max and treble at min, else it sounded too harsh and fizz. It was nice, but weak, and not even close to a Mesa high gain distortion.
I guessed this kind of high gain emulator are kind of obsolete. Did you still find the Dr. Boogie a good pedal?
This comment has been removed by the author.
ReplyDeleteCan I use bf244a instead of j201?
ReplyDeleteMaybe, but it might not sound as high gain as with J201's. An equivalent search resulted in that BF244A is closer to 2N5457.
DeleteHello again fuzzhead .. I have 1 question .. about pots .. LOG symbol is B and LIN is A here in greece/Europe ... so you , when you say B pot . What kind is it ? Lin or log ?? Because I see it’s different between USA and Europe .. thank you
ReplyDeleteHi there. At this blog B means linear ans A means audio taper.
DeleteIäm located in europé as well but got used to the US labels....
Thank you man ..waiting for finish my dr boogie . :D king regards
DeleteI finish the board ,, on next hours I solder the pots for test ,,, I have one more question . The trimmers I set on full or with test sound I set it ?
ReplyDeleteGenerally you want to set the trimmers to half supply voltage, in this case 4,5v. Each trimmer is connected to Drain of Q1 and Q4. Q5 is a buffer so it don't need a trimmer.
DeleteBut some people like a bit higher voltage like 5v but let your ears decide. It can take some time to dial it in but it usually a quite easy process if you have legit J Fets.
So I finish and I disappointed ...it’s working . But it doesn’t have the wow gain ,,, it have some gain between Marshall 1974x and fender vibroverb 1964 ... ahah ahah , no it’s joke , I dialling those trimmers for an hour but the max gain isn’t max .. :( ... I use for diode the 1N5818. It’s the same right ? And tomorrow I check the voltages
DeleteI check my battery and is bad . I replace with other ( not new but relatively good ) and the sound it’s better ... but I think to put 9v adapter for sure . Tomorrow I check the voltage . You say with 4.5v on Drain Is good . So I check all the Drain pins without the jfets or with ?
DeleteI put on the board 9v adapter and I redialling the trimms..... sounds amazing and the gain kick is like tube distortion ..... thank you fuzzhead . It’s amazing pedal
ReplyDeleteRight on! Its been lots of builds lately!
DeleteI’m thinking to make your pedal ( dronestortion ) :)
DeleteI have 1 more question fuzzhead ( never end for questions !!?!?) so I put adapter on board , but now I see , my 9 volt adapter is 0.6 ampere and the 9volt battery is 1 ampere.... it”s problem ? May I try with 1ampere adapter to see difference
ReplyDelete0,1A -- enough for...
Deletehello all.... how should transistors have a voltage cut-off?
ReplyDeletewhat are the parameters of Vgs off?
ReplyDeleteHey guys, I just built this. The distortion sounds really good but I have to max out the volume just to get unity. Is that normal?
ReplyDeleteNo, it is not normal. You might have a tine solder bridge at the end of the circuit?
DeleteBOA TARDE. COMO ADIONAR MAIS GRAVES?
ReplyDeleteThis comment has been removed by the author.
ReplyDelete