Obsessed with Dave! Super interesting information here. How about a Part 2!?
@moogdome25626 жыл бұрын
Dave is magic, knows his stuff, loving these videos. I had a JP4, and SH2, stupidly I sold them both, little did I know that today, synth prices have gone through the roof.thanks for showing. Excellent. Daves brain must be as big as a planet, Jupiter.
@andyanderson65577 жыл бұрын
First time watching this channel- this vid warms my heart. This man is a true WIZARD and the Synths need you Dave!- Thank you for bring them back to life so many can enjoy for years to come!
@myoriginalmusic67393 жыл бұрын
I am watching all these very interesting :)
@thisNewFoundLand6 жыл бұрын
...brilliant individual. Subscribed. Certainly, the greater value of KZbin on full display here. Good production value -- and a clever interviewer asking the right questions without getting in the way of the wise monk in his cell.
@Nervejam7 жыл бұрын
It would be nice to have an "after Dave has fixed it" bit on the end..
@annother3350 Жыл бұрын
yes a demo
@quibster8 жыл бұрын
Truly a charming bloke who knows his stuff. Interesting channel, just discovered you guys in the related videos from markusfuller's videos. Great stuff!
@edgeeffect8 жыл бұрын
Yeah... Imagine a Dave and Markus double-act.
@Bigsbeee5 жыл бұрын
Fabulous synth, tech is my kind of guy. Seems a really nice bloke. Really enjoyed this especially having just bought a beautiful example myself. Looks like you have the early Rev 1 there too ? Mine is suffering some tuning issues . Hopefully can rectify from rear of the Jup using the x4 trim pots.
@amsynths6 жыл бұрын
You cant tweak the sounds on the push button board they are in ROM. The 5th board is common modulation, the keyboard microprocessor does note assignment and the chorus board is under the levers. Just to be accurate, great video!
@homesynths15046 жыл бұрын
So it was you the one who wrote that retro review on FM?? haha.. I remember that anecdote...
@Geegeebinks4 жыл бұрын
Hello, Super interesting video, thank you ! I would like to know.. Is it a bad idea to install the Kenton Midi Kit on JP-4 ? Thanks in advance. Peace
@chriswareham5 жыл бұрын
You're right and the Roland CEO (even if it was Ikutaro Kakehashi - who I regard as a personal hero) was wrong. Some of the Jupiter 4 presets were awful, particularly "The Force" which is unusable and such a waste on a machine with only 8 presets!
@illustriouschin8 жыл бұрын
This guy takes jobs that nobody else would touch.
@danalexpiano5 жыл бұрын
4:09 bicycleee :-D :-D
@AdamTheAd-vanc3d8 жыл бұрын
Can someone tell me what type of trimmers that are on the side of the voice cards please. I salvaged some similar looking ones from an old pioneer cassete deck probably a very similar age to the Jupiter late 70s/very early 80s , im on a quest to get some for my project . Nice video and look inside the synthsizer.
@edgeeffect8 жыл бұрын
Just had a listen to a Jupiter 4 and it REALLY, REALLY reminds me of my old Korg Mono/Poly... was one a "reaction" to the other?
@marcbrasse7478 жыл бұрын
Not realy. The Jupiter 4 appeared in 1978. The Mono/Poly is from 1981 and a brother to the Korg Polysix, which was one of the synths that broke the price barrier for poly's. Furthermore the Mono/Poly has no presets but a lot more programming controls / options. Conceptually there are indeed some similarities though: 4 voice, single oscillator per voice, paraphonic (hm, is the Jupiter 4 paraphonic. I'dd actually have to look that up). I owned a Mono/Poly for years and totally loved it. The only reason I sold it was to finance a CS80. I do however think the sound of the Jupiter 4 has more character then that of the Mono/Poly. To my ears the 4 can typically make sounds that have balls and presence at the same time while on most other synths you normally have to go for one or the other.
@paulbuswell65666 жыл бұрын
Daves comment about them being worth more in pieces as spares really saddens me. It's getting more and more common on Ebay to come across rare synths thats are just a trail of listings. Obviously from the same seller, where they've ripped a synth apart, that could have been repaired if damaged.. Just to make more money. This in turn pushes up the prices of the remaining examples of the synth. There is one particular German seller on Ebay , who I think has some sort of illness that makes him move the decimal point at least one ( and sometimes two) extra digits to the right. Some of the his prices ,for what he is offering, are just eyewatering!
@dlawlis6 жыл бұрын
No part 2?
@purelyyonatan12298 жыл бұрын
How can I get in touch with Dave.....Need a Siel Mono repairing......
@ElectronicSound7 жыл бұрын
We'd be happy to pass on a message for you
@iSirTaki8 жыл бұрын
Don't touch the trimmers of the voiceboards! :-D
@teanou44358 жыл бұрын
#1 The Jupiter-4 only 'drifts' if you haven't changed the original 1970 (!) electrolytic capacitors that are used for the tuning. Soon as you put polypropylene caps, it stays in tune 100% with ZERO drift. Real bad myth that's still being propagated. #2 The JP-4 design is not complicated, and is in fact way more easy to work on than a Jupiter-8. And all polyphonic synthesizers still follow the same principle with having a dedicated oscillator for each voice... (polymoog aside) Also... you should have replaced all of the capacitors in there... I went through mine and put fresh ones in. While it takes some time, it ensures none will short out or leak at the bungs (which one of them did).
@davepegz8 жыл бұрын
I do like to keep the circuitry as original as possible, and although some electrolytic caps can deteriorate over time, it's by no means all - only about 15 -20% of them in my experience. I use an inline tester that can test them without unsoldering them - if they're still within spec. they can stay. Using polypropylene caps. does noticeably change the sound characteristics (although, admittedly only if you hear them side by side) so I replace any faulty ones using electrolytics. Tuning drift (in my experience anyway) is usually a temperature-related problem in the pitch bend/portamento circuitry. This one is particularly complicated because of a very early Kenton midi retrofit, which is far more invasive than later versions - replacing some of the original circuitry instead of just complimenting it......
@teanou44358 жыл бұрын
Capacitor types will only change the sound if they're used in the audio signal. I don't believe the tuning capacitors in the circuit are related to the audio signal out (but if I'm wrong, I have not noticed a sound difference with replacing those specifically). I agree that a certain "integrity" should be kept, I used japanese electrolytics for everything else for consistency. I still think it's a good idea to proactively replace the electrolytics with fresh *high quality!) ones, you never know "how much longer" they'll last, and it's more convenient doing the maintenance in one go rather than repeatedly having to revisit it. But at the same time, I don't repair other peoples' synths, just my own. I wasn't aware that kenton had kits like that... sounds like a nightmare since the JP-4 service manual is then inert :p
@skyprop8 жыл бұрын
Most complicated??? Dave, Stick your hands into a Yamaha CS-80.
@teanou44358 жыл бұрын
No kidding... the polymoog and CS-80 make the JP-4 look like child's play. Heck, even a JP-8 is more complex to work on.
@davepegz8 жыл бұрын
Yeah, I used to have a CS-80 many moons ago - I used to gig with a fan heater/fan to help keep the thing in tune :~) Fantastic sound, but a real nightmare to keep alive, and I always thought it should come supplied with roadies if it was going to live up to it's 'portable' claim........