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oatmeal769
New
Username: oatmeal769

Post Number: 1
Registered: 2-2010
Posted on Thursday, February 25, 2010 - 9:49 am:   Edit Post

Hey All,


I have a vintage F2-B (serial # 712) which needs to have the high impedance input jacks replaced. These are the ones which switch a resistor in to give a drop in sensitivity, etc.

The trouble is I cannot find a Switchcraft (or any other brand) which accepts a mono signal and SWITCHES OPEN.

There are several which will close a switch, but nothing like the original unit, which opens a single switch.

Can ANYONE tell me where to find them? I've looked EVERYWHERE!!

Thanks in advance!
jimmyj
Intermediate Member
Username: jimmyj

Post Number: 162
Registered: 8-2008
Posted on Thursday, February 25, 2010 - 11:51 am:   Edit Post

Hey Jeff,
I believe they still make all versions. Like this:
http://www.switchcraft.com/products/jack-85.html
or this:
http://www.switchcraft.com/products/jack-90.html
Pacific Radio (Hollywood / Burbank) or Electronic City (Burbank) might even stock them. If not, certainly Newark or Mouser online.
Alembic may be willing to sell you one too but I think it's stock part so you should be able to find it...
Jimmy J
oatmeal769
New
Username: oatmeal769

Post Number: 2
Registered: 2-2010
Posted on Thursday, February 25, 2010 - 12:25 pm:   Edit Post

Hi Jimmy,
No, none of those will work (I already ordered 3 and tried...)
Thanks for trying though!

The jack in question has an insulated 'nub' on the tip, which opens a circuit without effecting any other connection.

I really have looked all over, at this point I'm kind of looking for what Alembic uses in the first place. I'd really rather not send it in for a repair I can do in 2 minutes.

Here is a picture of the two input jacks on a channel. The one on the LEFT is the one which needs replacing
Input Jacks
pacificshine
Junior
Username: pacificshine

Post Number: 42
Registered: 7-2008
Posted on Thursday, February 25, 2010 - 2:55 pm:   Edit Post

Jeff,
I thing what you’re looking for is available at Mouser Electronics, (800) 346-6873 www.mouser.com, part number 502-13E (Switchcraft part). You can see its diagram in the Mouser on-line catalog on page 1152 accessed from http://mouser.com/CatalogRequest/Catalog.aspx then enter page number 1152 at bottom right. Looks like circuit diagram #4 will do what you need, and they have 25 pieces in stock.
--Alan
jimmyj
Intermediate Member
Username: jimmyj

Post Number: 163
Registered: 8-2008
Posted on Thursday, February 25, 2010 - 4:33 pm:   Edit Post

Thanks for the pic. That's a Switchcraft 13E - "isolated break". It's not represented in the drawings at the first linked page above but it is listed below.
Here's a link to Newark:
http://www.newark.com/jsp/displayProduct.jsp?sku=39F699&CMP=KNC-G10000675&HBX_OU=50&HBX_PK=SWITCHCRAFT+13E
I don't know if they have a minimum order but at least it shows that the part is still in production.
Jimmy J
jimmyj
Intermediate Member
Username: jimmyj

Post Number: 164
Registered: 8-2008
Posted on Thursday, February 25, 2010 - 4:36 pm:   Edit Post

Oops, Newark shows no stock but Mouser has 25 available...
http://www.mouser.com/ProductDetail/Switchcraft/13E/?qs=sGAEpiMZZMvlX3nhDDO4AMssdw1fQHKNcxxrsmbWksw%3d
(sorry, apparently links don't work while editing... D'OH!)
Jimmy J

(Message edited by jimmyj on February 25, 2010)
oatmeal769
New
Username: oatmeal769

Post Number: 3
Registered: 2-2010
Posted on Thursday, February 25, 2010 - 4:51 pm:   Edit Post

I ~think~ that might be it! I thought I had already ordered the entire switchcraft catalog. Mouser is great!
I'll try it, hopefully it's the one. Thanks!

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