Need discontinued LED

R

Robert Wolcott

Guest
Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)? I
believe these were discontinued a while ago.

Thanks,
Bob
 
I may have a couple, will have to check when I get home today. Leaving soon
for the early part of day.

JS

"Robert Wolcott" <rwolcott23@yahoo.com> wrote in message
news:aYWdnQF5t6hEKMLcRVn-sA@comcast.com...
Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)? I
believe these were discontinued a while ago.

Thanks,
Bob
Click to expand...
 
"Robert Wolcott" (rwolcott23@yahoo.com) writes:
Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)? I
believe these were discontinued a while ago.

Thanks,
Bob
Click to expand...
So is this to replace existing components, where you want things to
be exact replacements?

If they are just LEDs, then just use generic LEDs. There has to be a
good reason for tracking down the exact parts, and you've not supplied
such a reason.

Michael
 
I checked my stock, I don't have any. I must have sold them. Sorry!

JS
"No Spam Here - Joe Schmo" <Spammenot@Nospam.net> wrote in message
news:eek:ES7d.3902$Ae.3608@newsread1.dllstx09.us.to.verio.net...
I may have a couple, will have to check when I get home today. Leaving
soon
for the early part of day.

JS

"Robert Wolcott" <rwolcott23@yahoo.com> wrote in message
news:aYWdnQF5t6hEKMLcRVn-sA@comcast.com...
Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)? I
believe these were discontinued a while ago.

Thanks,
Bob
Click to expand...
 
On Sun, 3 Oct 2004 01:18:38 -0700, "Robert Wolcott"
<rwolcott23@yahoo.com> wrote:

|Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)? I
|believe these were discontinued a while ago.
|
|Thanks,
|Bob
|

Looking at the data sheet for the Dialight 507 series
http://www.dialight.com/pdfs/prodgroup/507-3918-xxxx-600.pdf

Could their 585 series be replacements?
http://www.dialight.com/pdfs/prodgroup/585-3xxx.pdf

Ross H
 
"Robert Wolcott" <rwolcott23@yahoo.com> wrote in message
news:aYWdnQF5t6hEKMLcRVn-sA@comcast.com...
Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)?
I
believe these were discontinued a while ago.

Thanks,
Bob
Click to expand...
According to the datasheet at the URL posted by Ross, these are
incandescent, not LEDs. In that case, you could use a 327 or similar
lamp.

For this app, incandescents are a poor choice. What I would do is
replace the lamp with a red LED, a 1N4004 rectifier diode (in case it's
AC) and a 2.2k ohm 1/2W resistor, all in series. This will give you
just about infinite life, and it will be really bright if you use a high
brightness red LED.
 
On Mon, 04 Oct 2004 04:04:53 GMT, Ross Herbert
<rherber1SPAMEX@bigpond.net.au> wrote:

|On Sun, 3 Oct 2004 01:18:38 -0700, "Robert Wolcott"
|<rwolcott23@yahoo.com> wrote:
|
||Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)? I
||believe these were discontinued a while ago.
||
||Thanks,
||Bob
||
|
|Looking at the data sheet for the Dialight 507 series
|http://www.dialight.com/pdfs/prodgroup/507-3918-xxxx-600.pdf
|
|Could their 585 series be replacements?
|http://www.dialight.com/pdfs/prodgroup/585-3xxx.pdf
|
|Ross H


I just looked through my old stock and I discovered I have about 40
Dialco 507-3917 on hand. However these are white so unless some way
could be used to color the bezel they would not be of much use. They
are there if you wish to pay for postage from Australia.

Ross H
 
"Robert Wolcott" <rwolcott23@yahoo.com> wrote in message news:aYWdnQF5t6hEKMLcRVn-sA@comcast.com...
Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)? I
believe these were discontinued a while ago.

Thanks,
Bob


This outfit shows 6 in stock...Paul
Click to expand...

http://www.exitech.com/simcatalog.asp?cat_description=Lamps
 
I could go with replacements but it would be a pain. These are argon laser
warning lights and appear in the power supply and laser head. I have two of
these lasers and don't want to replace the sockets in four instances (these
LEDs just plug in).

Bob


"Michael Black" <et472@FreeNet.Carleton.CA> wrote in message
news:cjp4ug$adj$1@freenet9.carleton.ca...
"Robert Wolcott" (rwolcott23@yahoo.com) writes:
Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)? I
believe these were discontinued a while ago.

Thanks,
Bob



So is this to replace existing components, where you want things to
be exact replacements?

If they are just LEDs, then just use generic LEDs. There has to be a
good reason for tracking down the exact parts, and you've not supplied
such a reason.

Michael
Click to expand...
 
On Sun, 3 Oct 2004 21:53:29 -0700, "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote:

|"Robert Wolcott" <rwolcott23@yahoo.com> wrote in message
|news:aYWdnQF5t6hEKMLcRVn-sA@comcast.com...
|> Where could I go to find three Dialco 507-3918 red LEDs (28V, 40mA)?
|I
|> believe these were discontinued a while ago.
|
|> Thanks,
|> Bob
|
|According to the datasheet at the URL posted by Ross, these are
|incandescent, not LEDs. In that case, you could use a 327 or similar
|lamp.
|
|For this app, incandescents are a poor choice. What I would do is
|replace the lamp with a red LED, a 1N4004 rectifier diode (in case it's
|AC) and a 2.2k ohm 1/2W resistor, all in series. This will give you
|just about infinite life, and it will be really bright if you use a high
|brightness red LED.
|

You are correct in your statement that the Dialco 507 is incandescent.
Also, while the LED type 585 (-3225) would work electrically, I failed
to notice that it is a physically much smaller device, and so would
probably not fit in the socket provided.

Looking further at the Dialight website I can't see any indication
that the 507 series has been discontinued. In fact it is still listed
in the range of incandescent products so it may still be available.
http://www.dialight.com/products.tpl?page=optoelectronics&cat=Panel&sub=Neon

Furthermore, it seems that Dialight make LED replacements for the 507
incandescent series. They are still called the 507 series but have a
different suffix. The OP would need to specify 507-4761-3331-500 (Red,
28V, 15mA)and would also have to ensure that the correct polarity was
observed when replacing lamps. It would make sense to add a reverse
protection diode to prevent smoke emanation.
http://www.dialight.com/pdfs/prodgroup/507-xxxx-33xx-500.pdf

Ross H
 
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