Archive for the ‘Studio Log’ Category

Sequential Circuits Pro One

On the workbench this time is a Sequential Circuits Pro One. This unit belongs to a famous Swedish musician that’s been in the studio here at Analog Sweden for the past three days. I’m not sure if I’m allowed to mention his name so I won’t.

Anyway the machine had several problems ranging from tuning, crackly potentiometers and keyboard problems. I gave the machine a complete overhaul and now it’s in great shape once again. Quite a bit of work but well worth it for a machine of this calibre.

Instead of using the now hard to obtain rubber bushings we replaced them with our own method using custom cut felt. This works well for all pratt and reed style keyboards, so if you have one that is failing drop us a line. We can also fix and repair faulty J-wires on these keyboards.


05 2010

Sequential Circuits Prophet 5

On the workbench this week is a revision 3 Sequential Circuits Prophet 5. These are still highly revered machines and definately amongst the sought after classic analogs. This unit came in for power supply recapping, it was also very much out of tune. After the recapping it was given a full calibration and tuning back to factory settings. Sure there’s still a little drift in the tuning but that’s to be expected with an old machine. It now sounds as lush as it did when it first left the factory all those years ago, a true classic.


05 2010

Yamaha CS70M Retro Fit

If you’ve been following the blog over the last months you’ll know that we organised a group buy of Kenton Retro Fits for the CS70. These had been long out of production but Kenton told us that if we had enough orders they would make a new design exclusively for us. So here it is, the fruits of our labour, a new Kenton retro kit fitted and working on a clients CS70M.


04 2010

Roland TR-808 Midi Kit

Here’s another familier job, this time it’s fitting a midi kit into a Roland TR-808. As we did before, the midi kit is fitted internally and a new socket is placed where the din sync socket used to be. What this means is that cosmetically nothing is changed on the machine. The new socket doubles as din sync as well as midi. The new switch has three positions instead of two. Operation is the same except when the switch is in the middle position midi is activated. You can play all the drums from a standard midi keyboard with a special midi/sync cable (comes with the kit)

Here’s a video of the completed job


01 2010


A new machine arrived for the studio. This time we added an ARP Odyssey MK II to the collection. It’s not clear if we will keep or sell this unit yet. Functionally it’s in pretty good shape, theres a broken (but glued back together) key. We may have some spares, I’ll have to check this out when i get a spare moment. Soundwise it sounds lovely, you can’t beat a nice slab of analog goodness. We now have all three variations of the Odyssey in the collection. If we decide to put one up for sale we’ll mention it here first of course.

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01 2010

Marion Prosynth, Sequential Circuits Prophet 2000 and a Yamaha TX7

We hope you all had a nice holiday, we all had a much needed break here at Analog Sweden. Unfortunately the weather is quite cold here at the moment, but hey we are in Sweden so what should we expect in the winter months. So we have a mixed bag to report on today, some analog, some digital and some digital with analog filters. Quite a mixed bunch.

First up is a stack of Marion Pro Synths, these were designed by Tom Oberheim and the core technology is based very much around his matrix 1000 synths. This are a little better though since you get a nice large LCD for editing. These units are NOS and had been sitting so long that i had to replace all the batteries, originally they were hardwired, but i figured to place holders in there so that the next time the battery needs replacing its a simple job that doesn’t involve any soldering.

Next up was a Yamaha TX7, this needed some general maintenance, i suppose you all know this is basically a DX7 in a small form factor, the less said about this the better, unless we plan to change our name to Digital Sweden…not any time soon thankfully :-)

The current job on the workbench is a Sequential Circuits Prophet 2000. This is an old school sampler, but has nice curtis based analog filters. Three of the eight voices were dead, I’ve since repaired them and have now encountered another problem (this is often the case with vintage gear, fix one thing, find another problem) Thenewly discovered fault is with the sampling input, i can sample but it only samples silence. I’ve traced the input signal and so far I’ve confirmed it up to the input filters. that cuts out quite a large section of the circuit, but there’s still plenty more to debug and so that’s my current quest.

Well I guess its time to get back to it, keep your eyes open over the coming weeks since there will be some major changes around here, including some updates to the site and a new web shop where you’ll be able to browse the goodness we have for sale.


01 2010

Roland VP-330 Calibration

Quite some time has passed since the last blog post, again the reason for this is simple, we’ve just been really busy. Anyway i’ve added a few new posts of the recent jobs we’ve been working on. There’s a few more to add, but they are ongoing so as soon as they are completed i’ll make some new posts about them. Anyway a new addition to the studio arrived, a Roland VP-330 vocoder. It’s in really nice shape too, except for a tiny mark near the logo. As with most things that arrive, it needed tuning and calibration. This i promptly did and now it’s sitting in it’s new home quite happily.


12 2009

DIY Sync 24 Splitter

After we did a little rearranging in the studio it became aparent that we didn’t have enough sync 24 connections for all the old Roland gear. So i was tasked to build a sync 24 splitter. A relatively simple task since its a completely passive circuit, so i set to work and you can see the results of my labour in the picutres.



12 2009

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