# Clarostat conductive plastic pots (380 & 485 series)

I

#### Igor The Terrible

Jan 1, 1970
0
Hi:

I'm trying to find out if anyone has used the conductive plastic
potentiometers for guitars and/or for volume pedals for pedal steels
and had positive results with them. Living on the coast with
excessive salt air and sand is not exactly the ideal environment for
carbon pots in terms of getting much useful life out of them.

I got some info of Honeywell's website and they claim a 1 million
cycle life (rotational) for the 485 series and 100,000 cycle life for
the 380 series with both having 1% dynamic noise and conform to MIL-
R-94 specifications. Although they are a bit pricey--especially the
485 series, however, if they work as well as Honeywell's propaganda
claims, they may well be worth the investment.

Any insights or thoughts would be sincerely appreciated.

http://sensing.honeywell.com/index.cfm?ci_id=16046&la_id=1&catId=79843

K

Jan 1, 1970
0
Unless you live in a palm frond hut right on the sand then regular pots are
fine. If you get enough sand and salt into a carbon type to wreck it then
nothings going to last long.
The whole guitar should come unglued in about ..oh 6 months so why worry

J

#### Jim

Jan 1, 1970
0
Keith said:
Unless you live in a palm frond hut right on the sand then regular pots are
fine. If you get enough sand and salt into a carbon type to wreck it then
nothings going to last long.

Conductive plastic is quieter than carbon, right?

H

#### Harrison Ford Prefect

Jan 1, 1970
0
Igor said:
Hi:

I'm trying to find out if anyone has used the conductive plastic
potentiometers for guitars and/or for volume pedals for pedal steels
and had positive results with them. Living on the coast with
excessive salt air and sand is not exactly the ideal environment for
carbon pots in terms of getting much useful life out of them.

I got some info of Honeywell's website and they claim a 1 million
cycle life (rotational) for the 485 series and 100,000 cycle life for
the 380 series with both having 1% dynamic noise and conform to MIL-
R-94 specifications. Although they are a bit pricey--especially the
485 series, however, if they work as well as Honeywell's propaganda
claims, they may well be worth the investment.

I haven't used them in a while, but when I did, I loved them.

I really need to get some again. They last like crazy. At
least they used to, and I assume they still do, or nobody would
buy them. Especially at that price./

I

#### Igor The Terrible

Jan 1, 1970
0
No not THAT extreme but, the CTS 500s I'm using in my strats are good
for about 10 - 13 months and start getting scratchy. For a pedal
steel where pots really get a workout...forget it. Even the ABs I'm
using last a year or less. ...and you are right, nothing really lasts
on the beach. Cleaning them is a very short lived fix and
subsequently become worse than what they were. It's not just the
salty air...it's the prevailing winds that blow it everywhere and into
everything.

S

#### Sacramento Dave

Jan 1, 1970
0
Harrison Ford Prefect said:
I haven't used them in a while, but when I did, I loved them.

I really need to get some again. They last like crazy. At
least they used to, and I assume they still do, or nobody would
buy them. Especially at that price./

How much are they ? Sounds like something I have to have but don't need

I

Jan 1, 1970
0
Their carbon comp pots were selling for around $20.00; which were replaced by the conductive plastic units. The 485 series you have to go directly through Honeywell because they are special order items. From what I've been hearing about them, they will be the last pot you will put in your guitar for a l o n g time--if ever. I have no idea how much they are, but,I will find out sometime next week. P #### PMG Jan 1, 1970 0 I don't like CTS pots in guitars. I've tried the ones from Hoffman Amps, Specialty Guitar, and Acme. The kinds with the smooth back, *and* that kind with the dimple in the middle. They were all scratchy, and hard to turn. I use CGE pots, which are easy to turn, and they're not scratchy. On top of being better than the CTS garbage, CGE pots cost less Neither one is as good as Stackpole pots were, but they haven't made those for a while. Buying used, or NOS Stackpole pots is too expensive for me. Haven't tried Honeywell pots. For me, the CGE pots last a couple years in a Tele, and then need cleaning. But you need to use Caigs DeOxit to clean them. RadioShack's "Contact/Control Cleaner Lubricant" stuff really isn't good for pots. Pete D #### DaveM Jan 1, 1970 0 Igor The Terrible said: Their carbon comp pots were selling for around$20.00; which were
replaced by the conductive plastic units. The 485 series you have to
go directly through Honeywell because they are special order items.
will put in your guitar for a l o n g time--if ever. I have no
idea how much they are, but,I will find out sometime next week.

I'm not a musician, but I have experience with a wide range of electronic
components and their characteristics. I don't know the specifics on the pots
that you've been discussing, but I would recommend that you take a look at
sealed pots. It seems, from the discussion, that the pot elements are being
contaminated and destroyed by airborne moisture and sand/grit. A sealed pot
should eliminate those hazards and make the pot last a long time. Don't know
the
I don't know the physical sizes of the pots that you need for the guitars.
Mouser carries several lines of pots, among them the Bourns Series 51 panel
mount pots. They are available on both Cermet and Conductive Plastic. THey are
listed on catalog page 542. If you don't have a copy of their catalog, you can
search for their part number 652-PCW1J-C24-BAB103 and then download a copy of

I

#### Igor The Terrible

Jan 1, 1970
0
Did some more digging and I came up with Bourns conductive plastic
pots. They are not cheap but they too are a great product. Moreover
they have roughly the same specs as the Clarostat 380 series and their
price is about the same. I believe somebody might have mentioned them
somewhere on this thread--whoever it was...good call!! They are
available at Mouser Electronics. Best of all, they were designed
specifically for guitar.

Anyway, if any of you are interested here are the numbers for both
250k and 500k 0.25W CP Pots.

250k: 652-95A1DZ28EA0300L http://www.mouser.com/search/refine.aspx?Ntt=652-95A1DZ28EA0300L

500K 652-95A1DZ28EA0302L http://www.mouser.com/search/refine.aspx?Ntt=652-95A1DZ28EA0302L

Thanks everyone for your insights and help.

M

#### Michael A. Terrell

Jan 1, 1970
0
Igor said:
Their carbon comp pots were selling for around \$20.00; which were
replaced by the conductive plastic units. The 485 series you have to
go directly through Honeywell because they are special order items.
will put in your guitar for a l o n g time--if ever. I have no
idea how much they are, but,I will find out sometime next week.

http://www.potentiometers.com/

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

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