That Master Volume is sooooo nice. It works all the way. Bass is wonderfully preserved, Treble stays clear. A wonderful thing this little pot. Thank you Lyle for your never ending pursuit for perfection! It really shows.
Thanks for answering my question on the live chat tonight regarding your preference for playing Gibson over Fender. Fortunately I was playing back in the days when their was no vintage guitar market, my brother and I owned them all from a flying V to explorer. The only two I held onto was a blue 57 Strat owned by Elvis Costello and an early 60 red strat which was my favourite. In the latter days out gigging I was afraid to take them out which kind of defeats the the point of owning them. Am suffering arthritis now and playing is really tough. If your are ever in Scotland drop by, you'll be more than welcome.
Gratifying indeed! If there was ever an amp that deserves to serve as the showcase for your ever-improving presentation, surely it's this one. The close up shots are a really nice touch.
I needed one of your videos for the ride home.. Just the right kind of zen thing to make the day end on a chill note.. Have not even started watching yet. Queued up for the ride. Cheers Lyle!
How nice and musical this amp is now and the master volume is awesome sounding, you get the best of the cleans and overdrive.... And the Yes riff, yummy.
Oh, so you are running the master volume in between the push and pull lines in between the phase inverter and the output tubes. Valco, Sano, Excelsior and other amps used a switch to short those two together as their standby switch and fixed bias or cathode bias you can still hear a tiny bit of audio signal leaking through. That is still one of my very favorite master volume circuits. I just swapped a Champ II's master volume over to that. Dang that particular Champ II sounds really really nice with a mean streak in it.
Well, thanks. I used to be. I was never a lead guitarist in bands. Always rhythm and written parts - never been a great improviser. I used to work out/write some intricate difficult parts but they would be rehearsed. Meanwhile, four year olds are playing Eruption…
There's a big lacking of rhythm players testing gear. I personally think it's much more important than ego stroking under the guise of testing a product etc.
@@BradsGuitarGarage Every time I’m watching someone test an amp I’m just thinking “Dude, please strum a big open E chord for me so I can hear what the hell we’re dealing with” but instead I get 6 minutes of the guy showing the subtle ways he’s gotten himself out of the pentatonic box.
Owner of a Lonely Heart on a cranked Bassman? works for me ;-) The amp sounds great. And a master volume is not a dirty word if it is a mod you put in, I am sure.. I need to watch this again now that I can concentrate on the tech bits..
@@PsionicAudio YES... I DID notice that when I watched it on the way home, could not recall it this morning.. But yes, I definitely heard it.. God I played Wings Greatest until my needle wore out and then my CD wore out, and Jet is such a killer tune.
Hi Lyle, when you talk about the 1M grid leaks in the phase inverter leading to blocking distortion, is this due to the old carbon comps increasing in value? Thanks for the great video!
Thanks Riley. No, they measured fine. But that’s a measurement taken with no voltage/current. Resistors can fail under load regardless of material, though 56 year old CCs are more likely than most. They absorb moisture and stuff over the decades.
Hey Lyle, I was hoping we'd get a 'nuts and bolts' description of how you installed the MV...been waiting since the Dr. Z 66's. Regardless, nice job as always.
No, that has a fairly poor taper and gets fizzy. It’s okish in an amp that has a Cut circuit and no negative feedback (Vox, Matchless) but doesn’t play nice with Fenders and Marshalls and such. And the type 3 (crossline) is either always in circuit with a lower value pot (say 500K) or big parts of the knob travel are useless if you want it transparent (1M pot). Some amps have it switched so it’s only there when you want it, but it’s really not an optimal choice.
Well, this is a Bassman, but I get your point. Not really feasible in this circuit without radically changing what this amp is. There are other amps that do that. But this is a ‘67 Bassman.
why change the output trafo wires? couldn't you just switch the PI output wires or the ones going to the power tubes? not doubting your work btw, just wondering if there's a special reason
You can. But I prefer to change the wires at the jack as that is the only place the wire colors deviate from other post ‘63 Fenders. And the grid/plate wires are often not long enough to be reversed.
This amp can never be expected to produce great gain tones, even with the Master volume. What it does excel at are cleans and all the in-between gain sounds. As soon as the gain is anywhere near 10, it loses the magic of what these amps do best, which is NOT high gain. However, they do take pedals really well.
@@PsionicAudioI built an ab165/aa864 on your recommendation last year. I also got all of the preamp tubes on the same PS node, again on your recommendation. Great sounding amp with no noise at all. The crunch is great, better than any other BF Fender that I own.
Just a stock Bassman with groove tubes. Lots of great tones in there. We used to A/B them with a 100 watt Marshall JMP with 6550's and an 80's Tube Screamer on top. With that rig I could get plenty of great tones ~ all I needed.
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That Master Volume is sooooo nice. It works all the way. Bass is wonderfully preserved, Treble stays clear. A wonderful thing this little pot. Thank you Lyle for your never ending pursuit for perfection! It really shows.
Satisfying!
Thanks for answering my question on the live chat tonight regarding your preference for playing Gibson over Fender. Fortunately I was playing back in the days when their was no vintage guitar market, my brother and I owned them all from a flying V to explorer. The only two I held onto was a blue 57 Strat owned by Elvis Costello and an early 60 red strat which was my favourite. In the latter days out gigging I was afraid to take them out which kind of defeats the the point of owning them. Am suffering arthritis now and playing is really tough. If your are ever in Scotland drop by, you'll be more than welcome.
@@martinreid1740 most of us are vintage 😂
Now that sounds like a real rock and roll guitar amp!
Sounds great. So quiet. The master volume sounds great. Thanks for the trim pot lesson. It's nice to learn.
PS that’s your guitar into your amp the whole video.
@psionicaudio Wow awesome
The playing tests at the end were kind of showing extremes on purpose. We’ll dial it in mo betta on the real playing video.
What a great sounding amp, the attention to detail in your workmanship is something you can be very proud of.
Gratifying indeed! If there was ever an amp that deserves to serve as the showcase for your ever-improving presentation, surely it's this one. The close up shots are a really nice touch.
Yeah, that thing sound amazing! What a lovely smooth overdrive tone. Nice work!
I needed one of your videos for the ride home.. Just the right kind of zen thing to make the day end on a chill note.. Have not even started watching yet. Queued up for the ride. Cheers Lyle!
Very nice. The work fixing this combo, the explanations and the guitar work.
How nice and musical this amp is now and the master volume is awesome sounding, you get the best of the cleans and overdrive....
And the Yes riff, yummy.
Soundtrack is really nice.
Dammit, that is a fantastic sounding and responding amp!
Oh, so you are running the master volume in between the push and pull lines in between the phase inverter and the output tubes. Valco, Sano, Excelsior and other amps used a switch to short those two together as their standby switch and fixed bias or cathode bias you can still hear a tiny bit of audio signal leaking through. That is still one of my very favorite master volume circuits. I just swapped a Champ II's master volume over to that. Dang that particular Champ II sounds really really nice with a mean streak in it.
No, not a crossline. See tomorrow’s video.
Thanks for putting the links to the other videos in the description. That is a real time saver.
I am beyond grateful for your sharing your work like this.
The clean alone is great but that sizzle 🗣️🤌
Fantastic job as always. That amp sounds amazing..!
Really cool tags on values😉👍👍
Beautiful work sir😃👍👍
Sounding great with master volume 😁👍👍
😎✌👍❤🖖
the amp sounds like one I would very much enjoy playing.
Sounds great!
Very nice Bassman amp!
WOW! that master volume is exceptional
You know, Lyle. You're quietly a very good rhythm player. That realization has slowly snuck up on me.
Well, thanks. I used to be. I was never a lead guitarist in bands. Always rhythm and written parts - never been a great improviser. I used to work out/write some intricate difficult parts but they would be rehearsed.
Meanwhile, four year olds are playing Eruption…
@@PsionicAudio Tapped out by the age of 6.
There's a big lacking of rhythm players testing gear.
I personally think it's much more important than ego stroking under the guise of testing a product etc.
@@BradsGuitarGarage Every time I’m watching someone test an amp I’m just thinking “Dude, please strum a big open E chord for me so I can hear what the hell we’re dealing with” but instead I get 6 minutes of the guy showing the subtle ways he’s gotten himself out of the pentatonic box.
Nice job, Lyle.
Thanks!
Owner of a Lonely Heart on a cranked Bassman? works for me ;-) The amp sounds great. And a master volume is not a dirty word if it is a mod you put in, I am sure.. I need to watch this again now that I can concentrate on the tech bits..
It was almost Jet…
Whoo-ooh-ooh-ooh-ooh-ooh…
@@PsionicAudio YES... I DID notice that when I watched it on the way home, could not recall it this morning.. But yes, I definitely heard it.. God I played Wings Greatest until my needle wore out and then my CD wore out, and Jet is such a killer tune.
Hi Lyle, when you talk about the 1M grid leaks in the phase inverter leading to blocking distortion, is this due to the old carbon comps increasing in value? Thanks for the great video!
Thanks Riley. No, they measured fine. But that’s a measurement taken with no voltage/current. Resistors can fail under load regardless of material, though 56 year old CCs are more likely than most. They absorb moisture and stuff over the decades.
What value trim pot do you use for the adjustable bias?
10k L
Hey Lyle, I was hoping we'd get a 'nuts and bolts' description of how you installed the MV...been waiting since the Dr. Z 66's. Regardless, nice job as always.
I’m putting the same MV in that rusted ‘67 as I type. I’ll be explaining how it works in the next video.
As always, you're a prince!!
Lovely sounding bassman, great work. Would that same MV circuit function as well in a reverb amp, specifically a 75 Vibrolux?
Thanks. Yes, any of the AB763 variants.
Would the simpler Type 3 sound similar in the upper 50% of its range?
No, that has a fairly poor taper and gets fizzy. It’s okish in an amp that has a Cut circuit and no negative feedback (Vox, Matchless) but doesn’t play nice with Fenders and Marshalls and such.
And the type 3 (crossline) is either always in circuit with a lower value pot (say 500K) or big parts of the knob travel are useless if you want it transparent (1M pot). Some amps have it switched so it’s only there when you want it, but it’s really not an optimal choice.
I know nothing about the design of the Deluxe, but it would be great if the master volume affected only one of the two channels.
Well, this is a Bassman, but I get your point. Not really feasible in this circuit without radically changing what this amp is. There are other amps that do that. But this is a ‘67 Bassman.
why change the output trafo wires? couldn't you just switch the PI output wires or the ones going to the power tubes? not doubting your work btw, just wondering if there's a special reason
You can. But I prefer to change the wires at the jack as that is the only place the wire colors deviate from other post ‘63 Fenders.
And the grid/plate wires are often not long enough to be reversed.
I'm jelous Scotty!
Just waiting for the revstar mod.😊
It’s coming soon
This amp can never be expected to produce great gain tones, even with the Master volume. What it does excel at are cleans and all the in-between gain sounds. As soon as the gain is anywhere near 10, it loses the magic of what these amps do best, which is NOT high gain. However, they do take pedals really well.
How many AB165/AA864 hybrids have you played?
@@PsionicAudioI built an ab165/aa864 on your recommendation last year. I also got all of the preamp tubes on the same PS node, again on your recommendation. Great sounding amp with no noise at all. The crunch is great, better than any other BF Fender that I own.
Have owned 2.
Hybrids or stock?
Just a stock Bassman with groove tubes. Lots of great tones in there. We used to A/B them with a 100 watt Marshall JMP with 6550's and an 80's Tube Screamer on top. With that rig I could get plenty of great tones ~ all I needed.
this awaited me from youtube as I clicked on your tab to watch this video
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Weird. I don’t have any control over that, sorry.