Jump Drive (LPD Sixty8)

M

MattG

Well-known member
I was sold on this based on @szukalski's excellent demo and build report. Although, as I was waiting on parts to finish the build, @MichaelW's build report kind of lowered my expectations.

So far, I've only done a quick "make sure it works" playthrough. But I really like what I'm hearing. I believe this is my first MIAB (unless you count the Bluesbreaker and derived pedals as MIAB).

For others that have built this: is the bass control super subtle, or does it have an obvious effect? Everything seems to work more or less as expected, but I can barely hear any change from turning the bass knob. It sounds pretty good even without the being able to control the bass, but since the knob is there, I'd like to be able to get a little tuning ability out of it.

I used BAT41 diodes for the clippers, based on MichaelW's build. I also used the simple non-latching relay for the footswitch.
 

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Looks awesome!

I remember the bass having a noticeable effect, I have the bass around 13:00 and the treble 11:00. I will double check tomorrow when it's not the midnight hour.
 
Feral Feline said:
What made you choose the MW's BAT41 clipping over Szukalski's BA282 clipping?
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For the simple reason that BAT41 are available from Mouser/DigiKey, BA282 are not. I already had a parts order going, and didn’t want to pay shipping to source from another vendor. So BAT41 it is!
 
Yeah, shipping woes I understand — the Bat41are a great choice IMO, but if you decide to try something else out, after you desolder the Bat41, install sockets!
I like to install sockets for anything easily damaged or swapped out (glass diodes and transistors). Makes it easier to swap out if you want to try something new or damage a diode bending its leg and you can't over-cook a transistor if you never apply heat to it... Lotta people here don't like sockets, for good reason; I like sockets for good reasons.
 
szukalski said:
PSA. If you're in Europe I can hook you up with a few BA282s.
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That's very kind of you, but I am in the USA. However, another very generous member has offered to send me some BA282s, so I'm covered!


Feral Feline said:
Yeah, shipping woes I understand — the Bat41are a great choice IMO, but if you decide to try something else out, after you desolder the Bat41, install sockets!
I like to install sockets for anything easily damaged or swapped out (glass diodes and transistors). Makes it easier to swap out if you want to try something new or damage a diode bending its leg and you can't over-cook a transistor if you never apply heat to it... Lotta people here don't like sockets, for good reason; I like sockets for good reasons.
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I have mixed feelings about sockets. I almost always use them for op-amps, not so much to support op-amp rolling, but more as a soldering safety precaution. But with simple two-lead components (like diodes or capacitors), yes, the sockets are great for quick testing of would-be mods. But then I always worry, if I'm using the pedal outside of home (i.e. band practice or a gig), what if the component falls out of the socket? And sockets also cause me "tweak paralysis", where I can't seem to ever settle on "the best" component(s). Then I feel like I really should be spending the time actually bettering my playing, so maybe someday I can do a badass demo like this. The real solution, I think, is to just get into bread-boarding - that's the most generalized version of socketing components!

Anyway, I added another Jump Drive PCB to my PedalPCB Wish List. My current one needs some re-work to get the bass control working, might as well socket the diodes while I'm in there. I do really like the sound of my Jump Drive as-is, though a little more bass would be nice (and presumably doable once I get that bass pot working). So I'll likely want to build another "clean" one.
 
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I totally get the "option paralysis", too. That's exactly why it takes me so long to build anything... I think of all the ways I can mod something, and then not all the mods will fit in an enclosure, so then I have to choose which mods to keep... etc.

Breadboarding is good, and bad. Talk about options...


Once narrowed down, and a decision has been made... can solder in one leg of a diode or transistor into its socket.
I've never had any component let go out of a socket, but then I'm not touring, and what few gigs I had have all dried up...
 
temol said:
Any experience with BA482s?
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The only circuit that I've come across that spec'd BA482's is the Mojito Deluxe. I was not able to find any for my build and I initially subbed with MA858's to get to the correct Vf. They sounded good in the pedal. But then I put in a pair of 2N5457's with the Drain and Source legs soldered together and while they were a skootch lower Vf they "sounded" better to me in the Mojito.

Another option would have been to use a pair of MPSA18's and just use the diode side (Base and Emitter, I think). I know some folks have subbed that in place of the soft clippers in the Paragon with good results. I have't tried it yet.
 
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