I just tried an Accutronics 3 spring medium decay tank in my '65 PRRI and it still has way too long of a decay. I am going to try a Mod 8AB1A1B, Short Decay, 3-Spring and hope it comes in around 2 seconds. The original Ruby that came with the amp is supposed to be short decay and it's crazy long.
@scottmatthews17217 сағат бұрын
Squier Precision basses are a great platform for modifications.
@jezmez6818 сағат бұрын
So is there a kit to make one of these somewhere? Eventually, I would like to make and amp, and I would love a Bassman with 4 celestion cream backs.
@ErikThomasMusic18 сағат бұрын
Fender just announced the new Tonemaster tweed 59' Bassman, coming soon! I won't be interested in one as I prefer real tube tone, however Fender did add some cool new attractive features to it. Its good that Fender is listening to the market demand and added things like effects loop, reverb etc. to the amp. YT reviewers are going to have a big day once they all get their hands on one, soon. It will be a hot seller.
@Satchmoeddie18 сағат бұрын
They call that interference distance between parts and wires a difference of inverse squares or something like that. As you get closer by X distance the dB of signal interference squares and then distance X closer again and it squares itself again. I am 100% sure I got the terminology 100% wrong but the concept is 97% correct. Some types of ionizing radiation work the same way.
@DavidEllis-rw1of19 сағат бұрын
Beautiful work!
@jimsalman725719 сағат бұрын
When you do the job properly, you effectively reap double rewards: Beauty... and Reliability!
@LarsonGuitarPlayer19 сағат бұрын
Wow! This sounded great with the mods. Now I want o JTM45.
@curtahnlund375819 сағат бұрын
Lyle, you Are such a honest person. A real human with such a special knowledge of your trade. I live in Sweden, but spent my time in Nashville in the earls 70 ties. Did know nothing about amps. Learning so much from you, that I am turning in my fender sf amps to a good swedish tech for service. Got they blackfaced via vintagefender amp repairs. They sound great👍
@LarsonGuitarPlayer20 сағат бұрын
You played Dust in the wind by Kansas. That song made me wanna play acoustic and made me buy an Ovation. ❤
@randomlyselecteduser20 сағат бұрын
Did part one get pulled? I can't seem to find it...
@rustymohican828020 сағат бұрын
So beautiful! I am happy : )
@YeatzeeGuitar20 сағат бұрын
Pure zen
@wallpapermusique23 сағат бұрын
"Red right sounds political"?? It sounds nautical to me...."red right returning". How many sailors/boaters here??
@Eric86Pete23 сағат бұрын
Hey Lyle, how do I get in touch with you for a mod package to my AC30? I’ve emailed but haven’t heard back. Thanks man!
@PsionicAudio23 сағат бұрын
Sorry, please be patient. I’m a one man shop and I’m drowning in emails.
@Eric86Pete23 сағат бұрын
@@PsionicAudiono worries! Just wanted to make sure I’m on your list in some way, shape or form! The exploding inbox is a testament to your work! Thanks for the reply!
@skeeterbuck1355Күн бұрын
Lyle, I've viewed all the videos on this amp and in the previous video on this amp you show as one of the mods you did was to change out the cathode bypass cap on V1 from 25uf to 1uf and you removed the bypass cap, another 25uf completely on the second triode. I this video I see that the second triode cap has been reinstalled. Is this correct? I'm asking as I'm modding my Blonde Bassman build to match your recommendations. Thanks!
@PsionicAudio23 сағат бұрын
I put a 4.7uF on the second triode IIRC. Might have been 10.
@skeeterbuck135523 сағат бұрын
Thanks Lyle!
@PsionicAudio23 сағат бұрын
I think I remember wanting a bit more gain without mud. And/or wanting the heater hum rejection of the bypassed cathode. Notice the snubber cap across the second stage plate. That was very necessary to keep squeal out and reduce hiss. I don’t remember what I used now, but it would have been between 100-500pF. Experiment.
@skeeterbuck135521 сағат бұрын
@@PsionicAudio In the video you mention a 330pf across the 100K plate resistor. I'm rather sure it was the same value as the treble bleed on the volume pot.. I'm going to try the 4.7uf for the bypass cap.
@merlesson1164Күн бұрын
Excellent as always. Thanks.
@martinreid1740Күн бұрын
Fantastic detailed work that makes me happy, can't wait to see more.
@jonnybeck6723Күн бұрын
"...semi-rotten cotton"
@ubmasteringКүн бұрын
This episode is perfect. By that I mean the flow and content are perfectly balanced. This leaves a good taste and the want for more.
@steveh1273Күн бұрын
how come all amps don't have a 47nf cap at the standby switch? Is this a common practice?
@PsionicAudioКүн бұрын
Most amps have standby after the reservoir (first filter) node. This circuit has SB before the reservoir so the added cap is needed. Standby is not needed in this amp with the rectifier tube, but as it’s a valuable fairly rare amp I’m just restoring that part of the circuit too.
@PsionicAudio23 сағат бұрын
PS a rectifier (tube or solid state) has a higher DC output with a capacitive load than without, so there would have been a large voltage spike if the switch didn’t have that cap. There is still a spike as 100nF isn’t much of a load compared to 40uF, but it’s better than having a no-load state on the rectifier. Hard on the rectifier tube, too.
@joeltunnahКүн бұрын
Nice work, but man, those old Fender eyelet boards are ugly, and the connections on the back... ugh. I know it's iconoclastic, but since it's already "player grade" I would have swapped it out for a turret board on standoffs, with all connections visible and accessible on top. One minor correction: the 68k input resistors are mixers, not "grid stoppers" which need to be physically on the socket pins. I'm sure you know that, but others may not.
@PsionicAudioКүн бұрын
They are only mixers if you use both inputs of a channel at once. If you use the lower gain input then they form a voltage divider and act as a grid stopper. If you use the higher gain input they (in parallel) are a grid stopper, though not perfectly located.
@PeteRatcliffe-i5lКүн бұрын
Great explanation! Could you comment on the use of frequency compensation that some amp builder's implement for this style of MV to address the impact of the loss of negative feedback? Cheers!
@PsionicAudio23 сағат бұрын
Thanks Pete. The frequency change is more apparent in amps that have a Presence circuit. Trying to compensate is tricky as you don’t know how the player is using the Presence circuit. Easy to overdo it and have the amp too bright for many (but still not enough for others). I advise clients that any MV involves some compromise, but this circuit is close to transparent over 1:00 and not objectionable between 10:00-1:00. If they find themselves using the amp with the Master at 8:30 it’s too much amp for that stage. Better to get a second smaller amp or look into the various reactive load attenuator devices (Suhr, Fryette, UA, etc). There are ways to compensate within the circuit (high pass filter increases as MV is turned down, very minor treble bleed circuit incorporated, etc) but like I said, that is pretty much guesswork as to what *most* players will find good. Others will hate it.
@PeteRatcliffe-i5l17 сағат бұрын
@@PsionicAudio Thank you for the quick and thoughtful response.Much appreciated.
@riffraffrichardКүн бұрын
Yeah a lot of the mud positions sounded muddy. I didn’t mind the sound of the booster, there’s a use for a heavy treble sound. Overall sounds a great guitar! Good looking, and really nice sound!
@cano228Күн бұрын
12:40, this would be very cool to have a 50 watt setting, but you are missing the point. The amp is supposed to be a lightweight, modern reliable version of the original, and not stray far from the original. The attenuator is for being able to play at home or smaller gigs maybe, and the xlr out is for gigs or easy recording. This amp isn't meant to be better than the original, it is rather meant to be as close as possible.
@diegorhoenisch62Күн бұрын
Absolutely beautiful work. Cheers, Alan Tomlinson
@fiddlixКүн бұрын
Absolutely stunning work Lyle, to tell the truth, I wouldn’t have expected anything less judging by your previous work you have posted. Cheers 🍻.
@remurderehtКүн бұрын
Rotten Cotton is going to be the name of my next music group 😄
@jimsalman725719 сағат бұрын
It could also be the nickname for someone who works in Congress.
@NinerFourWhiskeyКүн бұрын
Does your 1958 Bassman have *linear* volume pots? My 1960 5F6A does, and they're factory original, matching date codes. I've seen same in most later 5F6A along with the "non-scratchy" presence control circuit with a 25K pot.
@PsionicAudioКүн бұрын
Yes it does.
@hillelmusicКүн бұрын
What’s crazy is, as soon as you started playing on it I could smell the Fender amp smell coming through the video…
@dewey7330Күн бұрын
Well done sir. Looks great!
@Relayer6aКүн бұрын
Maybe I missed it, did you say you cleaned it? 🙃
@PsionicAudio23 сағат бұрын
I think I might have. Accidentally.
@briggsmech7038Күн бұрын
Lyle you are a true artist. What would you charge for a two-week apprenticeship?
@PsionicAudioКүн бұрын
$12,452.73 Otherwise I would not have the time. But thanks.
@DogatHeartКүн бұрын
Stunning !!
@victorbeebe8372Күн бұрын
Mahalo Lyle! Yes, I agree. Nice and orderly.
@evanharmon7928Күн бұрын
It makes me happy to see such attention to detail.
@IL2TXGunslingerКүн бұрын
Incredible series! Great to see so many people here. Video quality is superb
@SkinnyorangemusicКүн бұрын
You said the high end didnt sound vintage but were not on the vintage speaker sim
@pauldavis6356Күн бұрын
"Vomitish" - Something that resembles, but is not quite vomit. 🤮
@user-ok2ju4lw4uКүн бұрын
Wow!
@endoalley680Күн бұрын
After watching the repairs progress, these amp demonstrations are like the icing on the cake. I admit I sometimes skip ahead during the repair video to hear what the finished amp sounds like.
@soapboxearth2Күн бұрын
The bass pot is a 1964 cts, I'm watching on a 65-inch tv ,lol God, i would L❤VE to be able to restore an old 5f6a or JTM. Good lord, you have my envy, Lyle !!
@unclemeat8422Күн бұрын
Watching on my newish computer monitor instead of phone tonight. Image looks as fresh as the amp restoration Lyle!! There is a “64 Bassman head and cab with webers down the street for sale. Would it sound anything like what your rebuilding?
@PsionicAudioКүн бұрын
The ‘64 model is a very different amp, but cool in its own way. Thanks.
@colbyjack7074Күн бұрын
The difference between when that amp first came in and where it is at now is extremely stark and amazing!
@briansilcox5720Күн бұрын
Excellent choices and rationale for your handling of this restoration. Hope to see some description of impedance match logic of 4 speakers.
@PsionicAudioКүн бұрын
Thanks. Not much to say on that. There are four 8 ohm speakers in parallel making a 2 ohm load.
@goodun2974Күн бұрын
@@PsionicAudio , did Leo have those transformers custom-made for a 2 ohm load?
@PsionicAudio23 сағат бұрын
I doubt it. Probably in the Triad catalog then in the Schumacher. But it’s possible he asked them to make 2 ohm versions of existing models. It would been so much more convenient for the rest of us if he’d used 16 ohm speakers for a 4 ohm load.
@goodun297423 сағат бұрын
@@PsionicAudio It appears that Leo wanted to avoid series-parallel combinations in his 4x speaker cabinets, probably to avoid warranty repairs caused by having one blown speaker also disconnect another series-wired speaker from the system, and now you've got only two speakers left to handle full gig volume, leading to more blown speakers and possibly a blown output transformer...... Of course, it's easy enough to wire 4 speakers in series parallel in such a manner that when one speaker dies it doesn't automatically take a second speaker out of the circuit, but the fact that the Bassman has 4 separate output jacks seems to indicate he was worried about that type of scenario; Or perhaps it was a fail-safe for a speaker rattling at the gig and the musician could simply unplug The Wire to that 1 speaker that was causing a problem or perhaps it was a "show must go on" fail-safe for a bad speaker buzzing or rattling loudly at the gig, and the musician could simply unplug the wire to that one speaker that was causing a problem. I have some old Triad catalogues and I should look to see if they made transformers with 2 ohm secondary. I don't think I have any Schumacher catalogs......
@jerryking2418Күн бұрын
Very nice work.
@jimdeavenport9952Күн бұрын
Your layout work is superb. Some very nice video that will come in handy and hopefully here in the near future to use on my Brother n Law's 1958 Fender Bassman. We have been threatening to go back in and replace all the electrolytics at a minimum since the day we resurrected it after a 20 year Rip Van WInkle nap 5 years ago. A previous owner of the amp was a professional bass player and gigged with a lot so we know there are most likely some weak links in it so it doesn't get fired up as often and babied at that when it does. I am a believer in full restoration and use rather than Keep it Original Museum Piece. What good is a Model T if you can't drive it? I just sent a links to my Bro n Law.
@joemcgraw5529Күн бұрын
Beautiful work Lyle
@FuriousMessКүн бұрын
This series is a real treat! Thoroughly enjoyable and it's looking like a picture perfect example.
@jhjanko1Күн бұрын
Beautifully presented. Beautifully executed. As I progress in this hobby, I have learned that this level of quality requires only a slight increase in effort. Very satisfying.
Пікірлер
I just tried an Accutronics 3 spring medium decay tank in my '65 PRRI and it still has way too long of a decay. I am going to try a Mod 8AB1A1B, Short Decay, 3-Spring and hope it comes in around 2 seconds. The original Ruby that came with the amp is supposed to be short decay and it's crazy long.
Squier Precision basses are a great platform for modifications.
So is there a kit to make one of these somewhere? Eventually, I would like to make and amp, and I would love a Bassman with 4 celestion cream backs.
Fender just announced the new Tonemaster tweed 59' Bassman, coming soon! I won't be interested in one as I prefer real tube tone, however Fender did add some cool new attractive features to it. Its good that Fender is listening to the market demand and added things like effects loop, reverb etc. to the amp. YT reviewers are going to have a big day once they all get their hands on one, soon. It will be a hot seller.
They call that interference distance between parts and wires a difference of inverse squares or something like that. As you get closer by X distance the dB of signal interference squares and then distance X closer again and it squares itself again. I am 100% sure I got the terminology 100% wrong but the concept is 97% correct. Some types of ionizing radiation work the same way.
Beautiful work!
When you do the job properly, you effectively reap double rewards: Beauty... and Reliability!
Wow! This sounded great with the mods. Now I want o JTM45.
Lyle, you Are such a honest person. A real human with such a special knowledge of your trade. I live in Sweden, but spent my time in Nashville in the earls 70 ties. Did know nothing about amps. Learning so much from you, that I am turning in my fender sf amps to a good swedish tech for service. Got they blackfaced via vintagefender amp repairs. They sound great👍
You played Dust in the wind by Kansas. That song made me wanna play acoustic and made me buy an Ovation. ❤
Did part one get pulled? I can't seem to find it...
So beautiful! I am happy : )
Pure zen
"Red right sounds political"?? It sounds nautical to me...."red right returning". How many sailors/boaters here??
Hey Lyle, how do I get in touch with you for a mod package to my AC30? I’ve emailed but haven’t heard back. Thanks man!
Sorry, please be patient. I’m a one man shop and I’m drowning in emails.
@@PsionicAudiono worries! Just wanted to make sure I’m on your list in some way, shape or form! The exploding inbox is a testament to your work! Thanks for the reply!
Lyle, I've viewed all the videos on this amp and in the previous video on this amp you show as one of the mods you did was to change out the cathode bypass cap on V1 from 25uf to 1uf and you removed the bypass cap, another 25uf completely on the second triode. I this video I see that the second triode cap has been reinstalled. Is this correct? I'm asking as I'm modding my Blonde Bassman build to match your recommendations. Thanks!
I put a 4.7uF on the second triode IIRC. Might have been 10.
Thanks Lyle!
I think I remember wanting a bit more gain without mud. And/or wanting the heater hum rejection of the bypassed cathode. Notice the snubber cap across the second stage plate. That was very necessary to keep squeal out and reduce hiss. I don’t remember what I used now, but it would have been between 100-500pF. Experiment.
@@PsionicAudio In the video you mention a 330pf across the 100K plate resistor. I'm rather sure it was the same value as the treble bleed on the volume pot.. I'm going to try the 4.7uf for the bypass cap.
Excellent as always. Thanks.
Fantastic detailed work that makes me happy, can't wait to see more.
"...semi-rotten cotton"
This episode is perfect. By that I mean the flow and content are perfectly balanced. This leaves a good taste and the want for more.
how come all amps don't have a 47nf cap at the standby switch? Is this a common practice?
Most amps have standby after the reservoir (first filter) node. This circuit has SB before the reservoir so the added cap is needed. Standby is not needed in this amp with the rectifier tube, but as it’s a valuable fairly rare amp I’m just restoring that part of the circuit too.
PS a rectifier (tube or solid state) has a higher DC output with a capacitive load than without, so there would have been a large voltage spike if the switch didn’t have that cap. There is still a spike as 100nF isn’t much of a load compared to 40uF, but it’s better than having a no-load state on the rectifier. Hard on the rectifier tube, too.
Nice work, but man, those old Fender eyelet boards are ugly, and the connections on the back... ugh. I know it's iconoclastic, but since it's already "player grade" I would have swapped it out for a turret board on standoffs, with all connections visible and accessible on top. One minor correction: the 68k input resistors are mixers, not "grid stoppers" which need to be physically on the socket pins. I'm sure you know that, but others may not.
They are only mixers if you use both inputs of a channel at once. If you use the lower gain input then they form a voltage divider and act as a grid stopper. If you use the higher gain input they (in parallel) are a grid stopper, though not perfectly located.
Great explanation! Could you comment on the use of frequency compensation that some amp builder's implement for this style of MV to address the impact of the loss of negative feedback? Cheers!
Thanks Pete. The frequency change is more apparent in amps that have a Presence circuit. Trying to compensate is tricky as you don’t know how the player is using the Presence circuit. Easy to overdo it and have the amp too bright for many (but still not enough for others). I advise clients that any MV involves some compromise, but this circuit is close to transparent over 1:00 and not objectionable between 10:00-1:00. If they find themselves using the amp with the Master at 8:30 it’s too much amp for that stage. Better to get a second smaller amp or look into the various reactive load attenuator devices (Suhr, Fryette, UA, etc). There are ways to compensate within the circuit (high pass filter increases as MV is turned down, very minor treble bleed circuit incorporated, etc) but like I said, that is pretty much guesswork as to what *most* players will find good. Others will hate it.
@@PsionicAudio Thank you for the quick and thoughtful response.Much appreciated.
Yeah a lot of the mud positions sounded muddy. I didn’t mind the sound of the booster, there’s a use for a heavy treble sound. Overall sounds a great guitar! Good looking, and really nice sound!
12:40, this would be very cool to have a 50 watt setting, but you are missing the point. The amp is supposed to be a lightweight, modern reliable version of the original, and not stray far from the original. The attenuator is for being able to play at home or smaller gigs maybe, and the xlr out is for gigs or easy recording. This amp isn't meant to be better than the original, it is rather meant to be as close as possible.
Absolutely beautiful work. Cheers, Alan Tomlinson
Absolutely stunning work Lyle, to tell the truth, I wouldn’t have expected anything less judging by your previous work you have posted. Cheers 🍻.
Rotten Cotton is going to be the name of my next music group 😄
It could also be the nickname for someone who works in Congress.
Does your 1958 Bassman have *linear* volume pots? My 1960 5F6A does, and they're factory original, matching date codes. I've seen same in most later 5F6A along with the "non-scratchy" presence control circuit with a 25K pot.
Yes it does.
What’s crazy is, as soon as you started playing on it I could smell the Fender amp smell coming through the video…
Well done sir. Looks great!
Maybe I missed it, did you say you cleaned it? 🙃
I think I might have. Accidentally.
Lyle you are a true artist. What would you charge for a two-week apprenticeship?
$12,452.73 Otherwise I would not have the time. But thanks.
Stunning !!
Mahalo Lyle! Yes, I agree. Nice and orderly.
It makes me happy to see such attention to detail.
Incredible series! Great to see so many people here. Video quality is superb
You said the high end didnt sound vintage but were not on the vintage speaker sim
"Vomitish" - Something that resembles, but is not quite vomit. 🤮
Wow!
After watching the repairs progress, these amp demonstrations are like the icing on the cake. I admit I sometimes skip ahead during the repair video to hear what the finished amp sounds like.
The bass pot is a 1964 cts, I'm watching on a 65-inch tv ,lol God, i would L❤VE to be able to restore an old 5f6a or JTM. Good lord, you have my envy, Lyle !!
Watching on my newish computer monitor instead of phone tonight. Image looks as fresh as the amp restoration Lyle!! There is a “64 Bassman head and cab with webers down the street for sale. Would it sound anything like what your rebuilding?
The ‘64 model is a very different amp, but cool in its own way. Thanks.
The difference between when that amp first came in and where it is at now is extremely stark and amazing!
Excellent choices and rationale for your handling of this restoration. Hope to see some description of impedance match logic of 4 speakers.
Thanks. Not much to say on that. There are four 8 ohm speakers in parallel making a 2 ohm load.
@@PsionicAudio , did Leo have those transformers custom-made for a 2 ohm load?
I doubt it. Probably in the Triad catalog then in the Schumacher. But it’s possible he asked them to make 2 ohm versions of existing models. It would been so much more convenient for the rest of us if he’d used 16 ohm speakers for a 4 ohm load.
@@PsionicAudio It appears that Leo wanted to avoid series-parallel combinations in his 4x speaker cabinets, probably to avoid warranty repairs caused by having one blown speaker also disconnect another series-wired speaker from the system, and now you've got only two speakers left to handle full gig volume, leading to more blown speakers and possibly a blown output transformer...... Of course, it's easy enough to wire 4 speakers in series parallel in such a manner that when one speaker dies it doesn't automatically take a second speaker out of the circuit, but the fact that the Bassman has 4 separate output jacks seems to indicate he was worried about that type of scenario; Or perhaps it was a fail-safe for a speaker rattling at the gig and the musician could simply unplug The Wire to that 1 speaker that was causing a problem or perhaps it was a "show must go on" fail-safe for a bad speaker buzzing or rattling loudly at the gig, and the musician could simply unplug the wire to that one speaker that was causing a problem. I have some old Triad catalogues and I should look to see if they made transformers with 2 ohm secondary. I don't think I have any Schumacher catalogs......
Very nice work.
Your layout work is superb. Some very nice video that will come in handy and hopefully here in the near future to use on my Brother n Law's 1958 Fender Bassman. We have been threatening to go back in and replace all the electrolytics at a minimum since the day we resurrected it after a 20 year Rip Van WInkle nap 5 years ago. A previous owner of the amp was a professional bass player and gigged with a lot so we know there are most likely some weak links in it so it doesn't get fired up as often and babied at that when it does. I am a believer in full restoration and use rather than Keep it Original Museum Piece. What good is a Model T if you can't drive it? I just sent a links to my Bro n Law.
Beautiful work Lyle
This series is a real treat! Thoroughly enjoyable and it's looking like a picture perfect example.
Beautifully presented. Beautifully executed. As I progress in this hobby, I have learned that this level of quality requires only a slight increase in effort. Very satisfying.
sweet . Cheers