RadioBanter - Unknown Component

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Unknown Component

Pulled a high speed vacuum relay, Jennings RJ1A, out the other day
that I was saving for a QSK mod to my old amp. There is component
across the windings of this relay that I can not identify. It is
soldered, or silver soldered, to the winding terminals. It is about
3/16 square, yellow, and has the following markings: JAVX 8652 AA M390
14/01 1553.

Here is a slightly out of focus picture.
http://home.alltel.net/winlyn/RJ1A.jpg

Anyone?????

Win, W0LZ

Win wrote:

Pulled a high speed vacuum relay, Jennings RJ1A, out the other day
that I was saving for a QSK mod to my old amp. There is component
across the windings of this relay that I can not identify. It is
soldered, or silver soldered, to the winding terminals. It is about
3/16 square, yellow, and has the following markings: JAVX 8652 AA M390
14/01 1553.

Here is a slightly out of focus picture.
http://home.alltel.net/winlyn/RJ1A.jpg

Anyone?????

Win, W0LZ

It's a rectangular ceramic cap, _possibly_ 39pF ('cause of the "M390"
marking). Those things have military catalog numbers and don't
necessarily include the actual value printed on the cap, which is a pain
if you have a mixed bag of them, or if you have one on a board and want
to know it's value.

--
-------------------------------------------
Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

On Mon, 04 Jul 2005 11:28:42 -0700, Tim Wescott
wrote:

Win wrote:

Pulled a high speed vacuum relay, Jennings RJ1A, out the other day
that I was saving for a QSK mod to my old amp. There is component
across the windings of this relay that I can not identify. It is
soldered, or silver soldered, to the winding terminals. It is about
3/16 square, yellow, and has the following markings: JAVX 8652 AA M390
14/01 1553.

Here is a slightly out of focus picture.
http://home.alltel.net/winlyn/RJ1A.jpg

Anyone?????

Win, W0LZ

It's a rectangular ceramic cap, _possibly_ 39pF ('cause of the "M390"
marking). Those things have military catalog numbers and don't
necessarily include the actual value printed on the cap, which is a pain
if you have a mixed bag of them, or if you have one on a board and want
to know it's value.

Thanks, Tim. I think you are correct. Rich Measures, KG6K, said it
could be an MOV, which is a capacitive device.. What eve it is,
exactly, I think I am going to leave it in the circuit. I can't see
it hurting anything.

win, w0lz

It is a cap. I've got plenty of those things from thr Collins surplus sales.

Pete

"Win" wrote in message
...
On Mon, 04 Jul 2005 11:28:42 -0700, Tim Wescott
wrote:

Win wrote:

Pulled a high speed vacuum relay, Jennings RJ1A, out the other day
that I was saving for a QSK mod to my old amp. There is component
across the windings of this relay that I can not identify. It is
soldered, or silver soldered, to the winding terminals. It is about
3/16 square, yellow, and has the following markings: JAVX 8652 AA M390
14/01 1553.

Here is a slightly out of focus picture.
http://home.alltel.net/winlyn/RJ1A.jpg

Anyone?????

Win, W0LZ

It's a rectangular ceramic cap, _possibly_ 39pF ('cause of the "M390"
marking). Those things have military catalog numbers and don't
necessarily include the actual value printed on the cap, which is a pain
if you have a mixed bag of them, or if you have one on a board and want
to know it's value.

Thanks, Tim. I think you are correct. Rich Measures, KG6K, said it
could be an MOV, which is a capacitive device.. What eve it is,
exactly, I think I am going to leave it in the circuit. I can't see
it hurting anything.

win, w0lz

i am not highly qualified as an electronics guy so maybe this is stupid,
but isnt that a cap to reduce the spark as the contacts open? an old
points ignition condenser is for that purpose and it is .02 mfd