This has been a great series. I've been watching Uncle Doug work on some black and silver face Fenders and considering building my own. This gives me lots of inspiration. I'm not ready for something this complex, but the complexity of this amp is what gives you so many tone options. Keep up the good work, and I'll keep watching.
I'd been watching your channel for a long time. It's great to see your journey. I also love to hack my gear and build stuff. My father is an electrical engineer and taught me electronics when I was a kid, so I've tried to convince him to build a guitar tube amp with me as a father and son project. Hopefully we can. Keep up the good work.
I really enjoyed this series. I have taken several classes in electronics tech, and this really motivated me to try something like this. Keep showing more of these videos.
The filter cap upgrade is a good idea. I have had great results with F&T caps. When I modestly increase the primary filter caps like you discussed I get less flabby and more responsive low frequencies. Enjoy the series. Amp sounds good!
@@Yamazaki1923 Sprague Atom are good caps. The values I need are more readily available with the F&T caps from my suppliers. They are also easier to fit in spaces. I use a lot of Sprague orange drop caps in my circuits. Great quality.
With not too much distortion and playing through the bridge PU, this sounds killer. When too much distortion and through the neck PU it gets a bit farty. But hey, that was a great journey! Thanks for taking us along for the ride!
Glad to see you found and fixed some of the problems. Yes, the JJ 6V6S is a robust tube and was a good solution for the higher voltages due to the wrong transformer. I can guarantee you though, that the OT is not big enough and if you crank the amp up enough the core will saturate and will sound horrible. You should change the first stage filtering to be much bigger and to handle the 500+ plate voltage. Use 2 big caps in series like 220U, this will result in 110U filtering, but double the voltage rating of the cap, you need parallel resistors for this also, look at an old Fender amp schem. If your fuse isn't big enough, the inrush of current with bigger caps might blow it, and you might need to make it bigger. Part of the appeal of Dumbles is the clean tone, you really should put the switch in. Use eyelet boards next time, it's much easier, and cleaner. Also, shielded cable has capacitance that can remove high frequencies, you have a lot of it in there, it's probably sucking the tone out to some degree.
Congratulations on the Dumble build! Sounds great and thanks for taking the time to document it by making this video. It’s very educational to see you troubleshoot and the little things that can happen when one is building an amp like a yellow wire having a piece of the insulation missing and burning out a resistor below it or the cap that became unsoldered when you were soldering something else into the same eyelet. I admire your patience in tracking these things down. One funny note, because I am a bit hard of hearing (too many years of playing loud rock ‘n’ roll), I like to turn on the closed captioning, so sometimes see some funny mistranslations. The CC kept calling the Dumble amp a Dumbo amp. Got a little chuckle out of that. Thanks again!
just happened on your channel.. i think i've seen these before but i paid attention today.. reminded me of my early Dumble tone chasing... it wasn't until i perfected my fave circuit that i realized the "Dumble" tone wasn't really a tone but because he custom tuned each machine to its owner... and some just sound like crap.. honestly.. they are just amps.. with some mods.. i learned some tricks along the way.. picked and choose from some values and circuit mods.. my best amps i ever designed was a hybrid Princeton (foot switchable marshall/fender/mesa channels, master vol, reverb, effects loop, boost/bright, attenuator, adjustable "hotdog" bias switch) made a 100watt version too.. 4 6L6s.. with a 5150/fender vibrolux/ hk triamp channels... same basic mods.. trying to include the best of all worlds i could.. then i started chasing speakers.. that was completely enlightening.. the magic is in the speakers.. i built a 2x12 for recording.. a green back with that half closed.. then a vintage jensen.. open backed.. same cab tho.. with the smaller amp was so versatile.. perfect for recording.. the bigger amp with a 4x12 was a monster.. kept tweaking it and made a great road rig.. fast forward.. now a helix with IRs... DI a dry channel to the board.. send a full wet to the board for a 2nd channel.. and break off a 2nd chain pre amp/cab and send that to the little custom Princeton 3 channel stage amp.. sm57 on which speaker fits the sound needed.. .send that as a 3rd channel.. mix wet/dry/wet... pan the wet signals left and right with a slight delay.. feed the dry in dead center with a very small additional delay if needed.. thats huge and magical.. can be hard for metal.. silky smooth for jazz or twangy for country.. and anywhere in between.. can literally get anything from it.. it's way more than my full rack and stack from back in the day and doesn't break my back...
The amp sounds really good. Nice work sticking with it and finding the problems. You got me wanting to build one too. I gotta go find your schematic and parts list in the 1st two videos. Thanks for sharing the process. Nice picking as well!
This probably would have been more helpful earlier, but if you go to 45:59 in part two, you can see that that snap sound was actually that bias cap popping. Also thanks for the videos, the amp sounds great!
Nice video Kley. The 1.6ohm resistor isn't really an issue, it's still Ohm's Law no matter the value. Just one extra step with the calculator rather than reading the DMM. I still measure them each time even if I use 1% metal film
Well, you need a very good meter and leads to measure small resistance values and get reliable and accurate results. To use 1ohm 1% resistors is the only sensible option because they cost almost nothing.
It sounds SO much better with the corrected issues. But that's partly an issue, people building what they term "a Dumble" when all kinds of things could be wrong or different. The small details are what differentiates Great from Good. Look at all the fine options and ideas he had compared to the Marshall, Ampeg, Fender or SUNN of those days. Again, it's easy to do now, but no one was back then.
I use an Orange Amp Detonator ab y pedal to switch between channels on my modded 67 Bassman. The bass channel is reverted to 5F6-A tweed specs and the normal channel is reverted to AA864 specs (which is the bassman version of the quintessential AB763 black panel specs).
You must zero your meter before checking for 1 ohm. Your leads have certain resistance and you will see that. I use a Fluke 57V and it has the zero feature
One last word about the meter's resistance at 3:55; just short the leads together on the lowest ohm setting. Usually will read about .3 ohms. This is the meter's/leads internal resistance. Subtract from actual reading of 1 ohm resistor.
very coherent explanation of your troubleshooting experience. are you curious what tube rectification might offer? i’ve not thought it through but it seems pretty simple to rig an external tube rectifier box and bypass the solid state diodes just to play around and test it.
loved all three parts! Really insightful! I was wondering if you could make a vid where you can add a spring river into an amp (or a digital reverb or both), would love to see you build one into an amp that does not have one.
Hey I am huge fan of the videos. I was searching the web and coming up with very little comprehensive information on channel switching. Might I suggest this for you? I have noticed you have a great way of explaining this information..where it’s harder to learn elsewhere. Thanks again!! Appreciate the shared knowledge
This was great, fascinating, thanks for putting in all this work and sharing it! I'm curious for your thoughts/reasons for using the Brown DLite kit -- I've seen these for something like $900 bucks, and I'm thinking the sum of the components is probably a fair amount less than that. Although I do understand the convenience.
You're welcome! I looked at the D'Lite schematic a lot in preparing for this video and believe it is a very sound circuit. If it had a capable builder I'm sure it could be a great amp.
How do you see the chances of using the same schematics with home use wattage like up to a max of 15 watt and getting a very compareable sound out of it? Do all components need to be scaled down evenly? Or can i keep everything except for the power the same?
I've only ever played one Steel String Singer and one Overdrive Special (both David Lindley's) and your build doesn't sound much like those but it does sound really good and I agree it is extremely usable for any player cool enough to actually use his guitar's controls. I do however think it is worth the effort to at least try the switched mode since any amp with any similarities to Dumbles exhibits or should exhibit extreme articulation. It is likely worth a follow up video as well. Kudos, man... nice job.
Kley, will you please discuss the "high water" marks of the fender bassman series? Which circuits do you think are the "best?" Where did CBS go wrong in the silverfaced AC568 circuit as an example? Thanks!
Hi I do hope you continue making videos, very helpful. Im planning build either super liteTMB or EF86.. Having never played through either could you recommend best for clean tone?
Good job of giving RobRob his props; many of us would still be rubbing two tubes together without his guidance...
This has been a great series. I've been watching Uncle Doug work on some black and silver face Fenders and considering building my own. This gives me lots of inspiration. I'm not ready for something this complex, but the complexity of this amp is what gives you so many tone options. Keep up the good work, and I'll keep watching.
Thanks Jeff. My first build was something much simpler. Take it one step at a time and you can get there!
I'd been watching your channel for a long time. It's great to see your journey. I also love to hack my gear and build stuff. My father is an electrical engineer and taught me electronics when I was a kid, so I've tried to convince him to build a guitar tube amp with me as a father and son project. Hopefully we can. Keep up the good work.
Thank you!
That would be a lot of fun.
I really enjoyed this series. I have taken several classes in electronics tech, and this really motivated me to try something like this. Keep showing more of these videos.
Awesome result, you're an inspiration Kley.
The filter cap upgrade is a good idea. I have had great results with F&T caps. When I modestly increase the primary filter caps like you discussed I get less flabby and more responsive low frequencies. Enjoy the series. Amp sounds good!
Ive had some good success with F&T as well. Was sprague-atom the old go-to before?
@@Yamazaki1923 Sprague Atom are good caps. The values I need are more readily available with the F&T caps from my suppliers. They are also easier to fit in spaces. I use a lot of Sprague orange drop caps in my circuits. Great quality.
This is so cool - thank you! I love how expressive you play.
You successfully worked it out. Sounds super cool and high quality.
With not too much distortion and playing through the bridge PU, this sounds killer. When too much distortion and through the neck PU it gets a bit farty. But hey, that was a great journey! Thanks for taking us along for the ride!
Glad to see you found and fixed some of the problems. Yes, the JJ 6V6S is a robust tube and was a good solution for the higher voltages due to the wrong transformer. I can guarantee you though, that the OT is not big enough and if you crank the amp up enough the core will saturate and will sound horrible. You should change the first stage filtering to be much bigger and to handle the 500+ plate voltage. Use 2 big caps in series like 220U, this will result in 110U filtering, but double the voltage rating of the cap, you need parallel resistors for this also, look at an old Fender amp schem. If your fuse isn't big enough, the inrush of current with bigger caps might blow it, and you might need to make it bigger. Part of the appeal of Dumbles is the clean tone, you really should put the switch in. Use eyelet boards next time, it's much easier, and cleaner. Also, shielded cable has capacitance that can remove high frequencies, you have a lot of it in there, it's probably sucking the tone out to some degree.
Congratulations on the Dumble build! Sounds great and thanks for taking the time to document it by making this video. It’s very educational to see you troubleshoot and the little things that can happen when one is building an amp like a yellow wire having a piece of the insulation missing and burning out a resistor below it or the cap that became unsoldered when you were soldering something else into the same eyelet. I admire your patience in tracking these things down. One funny note, because I am a bit hard of hearing (too many years of playing loud rock ‘n’ roll), I like to turn on the closed captioning, so sometimes see some funny mistranslations. The CC kept calling the Dumble amp a Dumbo amp. Got a little chuckle out of that. Thanks again!
Oh boy, that's much better than last time. You got it!
Kudos, bud! Nice work... sounds wonderful.
Play you are leaving legend. Salute from Croatia 🇭🇷
just happened on your channel.. i think i've seen these before but i paid attention today.. reminded me of my early Dumble tone chasing... it wasn't until i perfected my fave circuit that i realized the "Dumble" tone wasn't really a tone but because he custom tuned each machine to its owner... and some just sound like crap.. honestly.. they are just amps.. with some mods.. i learned some tricks along the way.. picked and choose from some values and circuit mods.. my best amps i ever designed was a hybrid Princeton (foot switchable marshall/fender/mesa channels, master vol, reverb, effects loop, boost/bright, attenuator, adjustable "hotdog" bias switch) made a 100watt version too.. 4 6L6s.. with a 5150/fender vibrolux/ hk triamp channels... same basic mods.. trying to include the best of all worlds i could.. then i started chasing speakers.. that was completely enlightening.. the magic is in the speakers.. i built a 2x12 for recording.. a green back with that half closed.. then a vintage jensen.. open backed.. same cab tho.. with the smaller amp was so versatile.. perfect for recording.. the bigger amp with a 4x12 was a monster.. kept tweaking it and made a great road rig.. fast forward.. now a helix with IRs... DI a dry channel to the board.. send a full wet to the board for a 2nd channel.. and break off a 2nd chain pre amp/cab and send that to the little custom Princeton 3 channel stage amp.. sm57 on which speaker fits the sound needed.. .send that as a 3rd channel.. mix wet/dry/wet... pan the wet signals left and right with a slight delay.. feed the dry in dead center with a very small additional delay if needed.. thats huge and magical.. can be hard for metal.. silky smooth for jazz or twangy for country.. and anywhere in between.. can literally get anything from it.. it's way more than my full rack and stack from back in the day and doesn't break my back...
That amp sound amazing!
The amp sounds really good. Nice work sticking with it and finding the problems. You got me wanting to build one too. I gotta go find your schematic and parts list in the 1st two videos. Thanks for sharing the process. Nice picking as well!
I like it a lot, good job on trouble shooting the amp !!
This probably would have been more helpful earlier, but if you go to 45:59 in part two, you can see that that snap sound was actually that bias cap popping. Also thanks for the videos, the amp sounds great!
Just went back and rewatched and you can totally see it flinch during the pop! Nice catch.
@@KleyDeJong 👌
5F2H single ended KT 66 harp amp tweaked to a hot guitar amp! Amp building is a facinating hobby!
Nice video Kley. The 1.6ohm resistor isn't really an issue, it's still Ohm's Law no matter the value. Just one extra step with the calculator rather than reading the DMM. I still measure them each time even if I use 1% metal film
Well, you need a very good meter and leads to measure small resistance values and get reliable and accurate results. To use 1ohm 1% resistors is the only sensible option because they cost almost nothing.
It sounds SO much better with the corrected issues. But that's partly an issue, people building what they term "a Dumble" when all kinds of things could be wrong or different. The small details are what differentiates Great from Good. Look at all the fine options and ideas he had compared to the Marshall, Ampeg, Fender or SUNN of those days. Again, it's easy to do now, but no one was back then.
nice work. sounds really awesome
Would love to see some ways to implement channel/foot switching. Specifically in an ab763 style circuit. Thanks and great work!!
I use an Orange Amp Detonator ab y pedal to switch between channels on my modded 67 Bassman. The bass channel is reverted to 5F6-A tweed specs and the normal channel is reverted to AA864 specs (which is the bassman version of the quintessential AB763 black panel specs).
You must zero your meter before checking for 1 ohm. Your leads have certain resistance and you will see that. I use a Fluke 57V and it has the zero feature
Sounds awesome.
One last word about the meter's resistance at 3:55; just short the leads together on the lowest ohm setting. Usually will read about .3 ohms. This is the meter's/leads internal resistance. Subtract from actual reading of 1 ohm resistor.
very coherent explanation of your troubleshooting experience. are you curious what tube rectification might offer? i’ve not thought it through but it seems pretty simple to rig an external tube rectifier box and bypass the solid state diodes just to play around and test it.
loved all three parts! Really insightful!
I was wondering if you could make a vid where you can add a spring river into an amp (or a digital reverb or both), would love to see you build one into an amp that does not have one.
Hey I am huge fan of the videos. I was searching the web and coming up with very little comprehensive information on channel switching. Might I suggest this for you? I have noticed you have a great way of explaining this information..where it’s harder to learn elsewhere. Thanks again!! Appreciate the shared knowledge
Great stuff, love itÙ
I would be very interested in an analysis of the mesa mark iv circuit!
This was great, fascinating, thanks for putting in all this work and sharing it! I'm curious for your thoughts/reasons for using the Brown DLite kit -- I've seen these for something like $900 bucks, and I'm thinking the sum of the components is probably a fair amount less than that. Although I do understand the convenience.
You're welcome! I looked at the D'Lite schematic a lot in preparing for this video and believe it is a very sound circuit. If it had a capable builder I'm sure it could be a great amp.
Fantastic, way to go!
Frame 10:33 you can see that the shrink-wrap label plastic on the 50 V capacitor is blown off/down
You resemble Will Forte from SNL.
Cool video Kley, love the build! I think you should grab a 6V6 OT and see how she sounds!
Amp sounds very fizzy.. Lead dress is very important in a Dumble.. A clean build with quality components save alot of headaches..
That was the pop.
You have a cap that looks like it's about pulled apart next to your red alligator lead
How do you see the chances of using the same schematics with home use wattage like up to a max of 15 watt and getting a very compareable sound out of it?
Do all components need to be scaled down evenly? Or can i keep everything except for the power the same?
Change the power supply and output section. Preamp can stay the same.
Awesome video!! Did you end up putting the snubber caps back in?
Accidentally posted this to the pt II video haha
Yes I did on the drive channel. I think it helps give that smoother singing character. Eliminates fizz.
Do a Soldano or a Jose modded Marshall type!
6V6 😂👍
Rip Dumble
I've only ever played one Steel String Singer and one Overdrive Special (both David Lindley's) and your build doesn't sound much like those but it does sound really good and I agree it is extremely usable for any player cool enough to actually use his guitar's controls. I do however think it is worth the effort to at least try the switched mode since any amp with any similarities to Dumbles exhibits or should exhibit extreme articulation. It is likely worth a follow up video as well. Kudos, man... nice job.
Well now I feel a bit silly since you did exactly that and made it sound a bit more articulate, too.
What speakers did you use in the previous and this soundchecks?
Eminence red white and blues
@@KleyDeJong Sounds fantastic! Thanks for your answer!
hey, sorry if i missed this but what speakers/cab are you playing this through?
This is a fender 2x12 cab loaded with a single eminence red white and blues. Mic'd with a Pyle sm57 clone.
Is a dumbleator next?
nice tone but far from the original 183 dumble probably different trafos ,voltages , and scheme not totally accurate
Kley, will you please discuss the "high water" marks of the fender bassman series? Which circuits do you think are the "best?" Where did CBS go wrong in the silverfaced AC568 circuit as an example? Thanks!
Play legend
Hi I do hope you continue making videos, very helpful. Im planning build either super liteTMB or EF86.. Having never played through either could you recommend best for clean tone?
Boy, what a mess!