[sdiy] Roland SH-09 slide pots?

[rsdio at audiobanshee.com]

I haven't looked at these particular slide pots, but it seems that many of them have what is basically a section of PCB under the wiper, held on by metal tabs that wrap around the base. It would be easy to order a new PCB that would fit the metal casing, so that makes me wonder whether PCB fab houses can print carbon or other resistive material on a PCB just like the other materials that go into the process.

Does anybody know? How accessible are these carbon or other resistive materials to those of us who aren't full-on manufacturers of potentiometers?

I do know that flexible circuit manufacturers can make small sections of carbon-impregnated contacts at the ends of "cables." Unfortunately, I don't think that a flexible circuit would hold up under a fader wiper. But, if they can print this material on a flex PCB, then something tells me they should be able to print it on a rigid PCB.

Brian


On May 23, 2017, at 3:52 PM, Adam Inglis <21pointy at tpg.com.au> wrote:
> On 24 May 2017, at 2:34 AM, Eric Frampton <eric at ericframpton.com> wrote:
>> Sadly this one has a spot rubbed bare (like, the readings move smoothly from 1K to 90K to open circuit) on the resistive track, so there’s no rehabbing to be done - it needs a brand new resistive part.
> 
> Let us know if you find anything.
> 
> Does anyone know if there is a way of “transplanting” a track from a new, similar taper 30 mm travel type slide pot? 
> The base of the pot with the tracks on it comes apart without much difficulty from the housing, and the fine copper tines of the wiper mechanism could, with care, be re-fashioned to some degree.
> 
> These same pots are used in other Roland gear of that vintage such as the SH-2.
> 
> AI
> 
>> On May 23, 2017, at 2:48 AM, Adam Inglis <21pointy at tpg.com.au> wrote:
>>> Wow, uncanny, I was going to post the same thing last night.
>>> Then today, inspired by Sam from Syntaur’s video on cleaning the Arp slide pots, I desoldered one of the SH-09 pots, opened it up and took a closer look. I’ve actually managed to rehabilitate it to almost new. Now only got another 17 more to go!
>>> 
>>> FWIW I looked high and low and couldn’t find anything close available, even NOS.
>>> 
>>> On 23 May 2017, at 2:57 PM, Eric Frampton <eric at ericframpton.com> wrote:
>>>> I’m looking for a replacement slide pot for a Roland SH-09 synth. It’s 100K-A taper with a 35mm throw. Roland’s part numbers numbers were 029-306 and LFE9RC16A15. This is for SUB OSC volume. Help?