[Elecraft] hot glue K2 toroids?

[w8zn at comcast.net]

I believe there is lots of non out-gasing RTV's out there. I use it for power dividers all the time. Just smell it, it's pretty easy to tell the difference.

Terry

----- Original Message -----

From: Matt Palmer 

To: SidShusterman 

Cc: elecraft at mailman.qth.net, Rick Shindley 

Sent: Mon, 2 Mar 2009 20:25:52 +0000 (UTC)

Subject: Re: [Elecraft] hot glue K2 toroids?



I doubt you use actual RTV but a RTV-like sealant. RTV contains acetic

acid and will eat/corrode electronics and is a no-no for mil hardware.

In mil spec hardware I doubt you are winding your own toroids. While

it was common practice to do your own air wound coil knifing, the CMMI

people have pretty much axed that practice as it makes it too easy to

loose the recipe and manufacturing costs are too high. Now everything

is bought with a ridiculous tolerance spec from coilcraft or its laser

trimmed. (just gave the manufacturing cost to someone else really, but

the big wigs never realize that)



Just wanted to give my 0.02 before some people got the idea to goto

the hardware store and grab RTV, make sure you know what they are

using as the solvent!



/also produces military hardware

Matt

W8ESE

Former KD8DAO

http://blog.MattIsKichigai.com







On Mon, Mar 2, 2009 at 3:14 PM, SidShusterman wrote:

> I currently work for a military radio manufacturer and we vibrate

> everything we make because lives depend on our products. In cases where

> vibration is an issue we use RTV to provide a cushion. I am not

> suggesting anything just stating a commercial fact.

> Step away from the hot glue gun.  It is for scrapbooking not radio

> manufacture.

> 73,

> Sid

>

>

>> Applying hot glue in tiny amounts takes a level of creativity and skill not

>> found with most kit builders.

>> Why risk it?

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