8V 40mA bi-pin lamp (Marantz)

[Tim Schwartz]

Hello all,

Anyone know of a generic lamp that is an 8 volt, 40 mA bipin type?
These are used as source indicators in receivers like the Marantz 2270
and 2275. The 6.3 volt 7380 is readily available, but won't last long
running on 8 volts, and gets too hot as well.

Of course a reliable vendor who sells them would be just as good.

Many thanks,
Tim Schwartz
Bristol Electronics

 

[Phil Allison]

"Tim Schwartz"

Anyone know of a generic lamp that is an 8 volt, 40 mA bipin type? These
are used as source indicators in receivers like the Marantz 2270 and 2275.

** Gee - a small bi-pin lamp is just begging to get replaced with a white
LED.




..... Phil

 

[dave]

On 09/04/2013 06:52 AM, Tim Schwartz wrote:

Hello all,

Anyone know of a generic lamp that is an 8 volt, 40 mA bipin type?
These are used as source indicators in receivers like the Marantz 2270
and 2275. The 6.3 volt 7380 is readily available, but won't last long
running on 8 volts, and gets too hot as well.

Of course a reliable vendor who sells them would be just as good.

Many thanks,
Tim Schwartz
Bristol Electronics

An LED and a resistor should work best.

 

[dave]

On 09/04/2013 07:29 AM, Phil Allison wrote:

"Tim Schwartz"

Anyone know of a generic lamp that is an 8 volt, 40 mA bipin type? These
are used as source indicators in receivers like the Marantz 2270 and 2275.


** Gee - a small bi-pin lamp is just begging to get replaced with a white
LED.




.... Phil


What he said!

 

[John Robertson]

On 09/04/2013 6:52 AM, Tim Schwartz wrote:

Hello all,

Anyone know of a generic lamp that is an 8 volt, 40 mA bipin type?
These are used as source indicators in receivers like the Marantz 2270
and 2275. The 6.3 volt 7380 is readily available, but won't last long
running on 8 volts, and gets too hot as well.

Of course a reliable vendor who sells them would be just as good.

Many thanks,
Tim Schwartz
Bristol Electronics

eBay or use 6V bulbs and a dropping resistor...

Or LEDs as Phil suggested.

John :-#)#

--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

 

[Trevor Wilson]

On 4/09/2013 11:52 PM, Tim Schwartz wrote:

Hello all,

Anyone know of a generic lamp that is an 8 volt, 40 mA bipin type?
These are used as source indicators in receivers like the Marantz 2270
and 2275. The 6.3 volt 7380 is readily available, but won't last long
running on 8 volts, and gets too hot as well.

Of course a reliable vendor who sells them would be just as good.

Many thanks,
Tim Schwartz
Bristol Electronics

**I've found that owners of those old Marantz recievers are only too
happy to spend some extra bucks on replacing ALL lamps with LEDs. That
includes the stereo and source indicator lamps. The payoffs are huge.
They include:

* Far lower power consumption and consequent minimised damage to the
plastic housing that contains the dial back-lighting.
* Far, far more attractive dial lighting, if the LEDs used are blue ones.
* Indefinite (or at least very long) life-span for the lighting.

I've found that Lumileds™ work extremely well, due to their wide
dispersion characteristics. It requires some extra effort for the
repairer though. You can purchase plug-n-play replacements from eBay, if
you can't be bothered doing your own work.

--
Trevor Wilson www.rageaudio.com.au

 

[Arfa Daily]

"Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
news:b8pgpbFeir5U1@mid.individual.net...

On 4/09/2013 11:52 PM, Tim Schwartz wrote:
Hello all,

Anyone know of a generic lamp that is an 8 volt, 40 mA bipin type?
These are used as source indicators in receivers like the Marantz 2270
and 2275. The 6.3 volt 7380 is readily available, but won't last long
running on 8 volts, and gets too hot as well.

Of course a reliable vendor who sells them would be just as good.

Many thanks,
Tim Schwartz
Bristol Electronics

**I've found that owners of those old Marantz recievers are only too happy
to spend some extra bucks on replacing ALL lamps with LEDs. That includes
the stereo and source indicator lamps. The payoffs are huge. They include:

* Far lower power consumption and consequent minimised damage to the
plastic housing that contains the dial back-lighting.
* Far, far more attractive dial lighting, if the LEDs used are blue ones.
* Indefinite (or at least very long) life-span for the lighting.

I've found that Lumileds™ work extremely well, due to their wide
dispersion characteristics. It requires some extra effort for the repairer
though. You can purchase plug-n-play replacements from eBay, if you can't
be bothered doing your own work.

--
Trevor Wilson www.rageaudio.com.au

Although of course, care needs to be taken that the lamps are actually being
fed with DC. In many items using pea bulb indicators and back illumination,
they are fed with AC straight off the tranny, or sometimes via a series
resistor whether AC or DC. This means that if you drop the current by
swapping to LEDs, the voltage will rise. I have also found that it is hard
to match the 'colour' of small bulbs with LEDs, particularly when they are
deliberately under-run to produce a more 'lemon' coloured light. Things like
tuning meters just don't look right if the light behind them is too white.
And even with wide angle LEDs, the light dispersion is sometimes not enough
to 'fill' an area with light, resulting in uneven illumination.

I recently replaced a number of the feature lamps on my pinball table's
playfield with LEDs. To replace the ones that shone through clear plastic
diffusers, so were normally 'white', I used warm white LEDs with a water
clear lens. I then diffused the dome by rubbing it with some very fine wet
and dry paper, and then added some yellow felt tip. This took the output
from warm white to a colour very similar to a tungsten lamp, which produced
illumination much closer to the original bulb.

Arfa

 

[Phil Allison]

"Arfa Daily"

Although of course, care needs to be taken that the lamps are actually
being fed with DC.

** LEDs are, believe it or not, DIODES !!

So they can be used on low voltage ( ie 6.3V ) AC supplies with only a
series resistor.

Put two of 'em in reverse parallel and the supply voltage can be much
higher.

They come in all colours too: red, orange, yellow, green, blue and purple.

Some ingenuity may be needed to get the best result in each case, but it
well worth not having to search high and low for special, low current tiny
bulbs.



.... Phil

 

[Leif Neland]

Phil Allison kom med fřlgende:

"Arfa Daily"

Although of course, care needs to be taken that the lamps are actually
being fed with DC.


** LEDs are, believe it or not, DIODES !!

Having LEDs run on one half-phase of AC can cause flicker.

It can be seen on cheap christmas decorations, which flicker
annoyingly, especially at the perifical vision, which is optimized to
see quick movements of e.g. predators. If you look at the light
directly, the flicker is less or not noticable, because at that angle
the eye wants details, not speed.

It might be less noticable at 60Hz than the european 50Hz ac.

So it might be advisable to rectify the ac either full wave or just a
diode and a cap.

IMHO the lights turning off slowly also looks more cool than an led
turning off abruptly

Leif

--
Husk křrelys bagpĺ, hvis din bilfabrikant har taget den idiotiske
beslutning at undlade det.

 

[Phil Allison]

"Leif Neland"

"Arfa Daily"

Although of course, care needs to be taken that the lamps are actually
being fed with DC.


** LEDs are, believe it or not, DIODES !!

Having LEDs run on one half-phase of AC can cause flicker.

It can be seen on cheap christmas decorations, which flicker annoyingly,
especially at the perifical vision, which is optimized to see quick
movements of e.g. predators. If you look at the light directly, the
flicker is less or not noticable, because at that angle the eye wants
details, not speed.

** For typical red bezels or indicator lights, it is simply not visible.

It might be less noticable at 60Hz than the european 50Hz ac.

** I am posting from Aussie land - we have 50 Hz.

So it might be advisable to rectify the ac either full wave or just a
diode and a cap.

** The lack of visible flicker was surprising to me.

It tried red and white leds with the same result.

IMHO the lights turning off slowly also looks more cool than an led
turning off abruptly

** Neon bezels have been going off fast since, like forever.




.... Phil

 

[Arfa Daily]

"Phil Allison" <phil_a@tpg.com.au> wrote in message
news:b8q6srFire3U1@mid.individual.net...

"Arfa Daily"

Although of course, care needs to be taken that the lamps are actually
being fed with DC.


** LEDs are, believe it or not, DIODES !!

So they can be used on low voltage ( ie 6.3V ) AC supplies with only a
series resistor.

Yes. However, they are not renowned for having a very high PIV, so whilst
you would probably get away with just a series resistor at low AC, you just
might not with AC a bit higher than that ... The point I was making was that
although a simple series resistor is fine if the lamp supply is DC, it *may*
not be if it is AC, and you shouldn't just assume that it is one or the
other. As I said before you snipped the context of my comment in order to
make your point ...

Put two of 'em in reverse parallel and the supply voltage can be much
higher.

Agreed

They come in all colours too: red, orange, yellow, green, blue and purple.

Some ingenuity may be needed to get the best result in each case, but it
well worth not having to search high and low for special, low current tiny
bulbs.



... Phil

 

[Arfa Daily]

"Phil Allison" <phil_a@tpg.com.au> wrote in message
news:b8qtiiFn3q7U1@mid.individual.net...

"Leif Neland"
"Arfa Daily"

Although of course, care needs to be taken that the lamps are actually
being fed with DC.


** LEDs are, believe it or not, DIODES !!

Having LEDs run on one half-phase of AC can cause flicker.

It can be seen on cheap christmas decorations, which flicker annoyingly,
especially at the perifical vision, which is optimized to see quick
movements of e.g. predators. If you look at the light directly, the
flicker is less or not noticable, because at that angle the eye wants
details, not speed.

** For typical red bezels or indicator lights, it is simply not visible.

It is to some of us. I find the PWM'd LED flicker of road works cone-top
beacons very annoying, as well as the flicker from PWM'd LED stop and tail
lights on some makes of car. My wife doesn't notice it all, however.
Admittedly, the effect is worse at the periphery of vision, but I still see
it looking head on at the source.

That said, if two LEDs are used in inverse parallel as you suggested, rather
than paralleling with a conventional diode or just relying on the reverse
blocking of the LED, flicker is not an issue, as each LED will produce light
on opposite half cycles.

It might be less noticable at 60Hz than the european 50Hz ac.


** I am posting from Aussie land - we have 50 Hz.


So it might be advisable to rectify the ac either full wave or just a
diode and a cap.

** The lack of visible flicker was surprising to me.

It tried red and white leds with the same result.


IMHO the lights turning off slowly also looks more cool than an led
turning off abruptly


** Neon bezels have been going off fast since, like forever.

That is true, but I think that Lief was more referring to things like meter
and tuning scale backlighting, rather than on off indicators.

Arfa

... Phil

 

[Gareth Magennis]

** For typical red bezels or indicator lights, it is simply not visible.


It is to some of us. I find the PWM'd LED flicker of road works cone-top
beacons very annoying, as well as the flicker from PWM'd LED stop and tail
lights on some makes of car. My wife doesn't notice it all, however.
Admittedly, the effect is worse at the periphery of vision, but I still
see it looking head on at the source.

Although I don't find this particularly annoying, I very much notice it too.
For me the effect manifests itself as a line of bright strobing when my eyes
move horizontally past the flickering LED's. Like * * * * * * *
* * * * *

In the old days you could get a very similar effect by injesting
halluconegenic mushrooms or a tab of acid.



Gareth.

 

[dave]

On 09/04/2013 06:14 PM, Arfa Daily wrote:

Although of course, care needs to be taken that the lamps are actually
being fed with DC.

LEDs run fine on AC, as long as the voltage and current are within limits.

 

[dave]

On 09/05/2013 05:50 AM, Arfa Daily wrote:

"Phil Allison" <phil_a@tpg.com.au> wrote in message
news:b8q6srFire3U1@mid.individual.net...

"Arfa Daily"

Although of course, care needs to be taken that the lamps are
actually being fed with DC.


** LEDs are, believe it or not, DIODES !!

So they can be used on low voltage ( ie 6.3V ) AC supplies with only a
series resistor.


Yes. However, they are not renowned for having a very high PIV, so
whilst you would probably get away with just a series resistor at low
AC, you just might not with AC a bit higher than that ... The point I
was making was that although a simple series resistor is fine if the
lamp supply is DC, it *may* not be if it is AC, and you shouldn't just
assume that it is one or the other. As I said before you snipped the
context of my comment in order to make your point ...



Put two of 'em in reverse parallel and the supply voltage can be much
higher.

Agreed


They come in all colours too: red, orange, yellow, green, blue and
purple.

Some ingenuity may be needed to get the best result in each case, but
it well worth not having to search high and low for special, low
current tiny bulbs.



... Phil

https://duckduckgo.com/?t=lm&q=led+series+resistor+calculator

 

[Trevor Wilson]

On 5/09/2013 11:14 AM, Arfa Daily wrote:

"Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
news:b8pgpbFeir5U1@mid.individual.net...
On 4/09/2013 11:52 PM, Tim Schwartz wrote:
Hello all,

Anyone know of a generic lamp that is an 8 volt, 40 mA bipin type?
These are used as source indicators in receivers like the Marantz 2270
and 2275. The 6.3 volt 7380 is readily available, but won't last long
running on 8 volts, and gets too hot as well.

Of course a reliable vendor who sells them would be just as good.

Many thanks,
Tim Schwartz
Bristol Electronics

**I've found that owners of those old Marantz recievers are only too
happy to spend some extra bucks on replacing ALL lamps with LEDs. That
includes the stereo and source indicator lamps. The payoffs are huge.
They include:

* Far lower power consumption and consequent minimised damage to the
plastic housing that contains the dial back-lighting.
* Far, far more attractive dial lighting, if the LEDs used are blue ones.
* Indefinite (or at least very long) life-span for the lighting.

I've found that Lumileds™ work extremely well, due to their wide
dispersion characteristics. It requires some extra effort for the
repairer though. You can purchase plug-n-play replacements from eBay,
if you can't be bothered doing your own work.

--
Trevor Wilson www.rageaudio.com.au


Although of course, care needs to be taken that the lamps are actually
being fed with DC. In many items using pea bulb indicators and back
illumination, they are fed with AC straight off the tranny, or sometimes
via a series resistor whether AC or DC. This means that if you drop the
current by swapping to LEDs, the voltage will rise. I have also found
that it is hard to match the 'colour' of small bulbs with LEDs,
particularly when they are deliberately under-run to produce a more
'lemon' coloured light. Things like tuning meters just don't look right
if the light behind them is too white. And even with wide angle LEDs,
the light dispersion is sometimes not enough to 'fill' an area with
light, resulting in uneven illumination.

**All quite true, however, I was specifically referring to the Marantz
products and Lumileds™. The Marantz blue dial looks stunning when
backlit via blue LEDs. Far, far better than the original lamps and with
vastly lower currents and, consequently, heat. The original lamps are
rated at 8 Volts @ 200ma each. In some Marantz models, there is 7 or 8
of the suckers! The heat generated warps the plastic housing containing
the backlighting. Lumleds™ deliver an even 120 degree spread of light
and are thus an excellent choice for backlighting in these
circumstances. Particularly given they can be run at around 10ma each.

I recently replaced a number of the feature lamps on my pinball table's
playfield with LEDs. To replace the ones that shone through clear
plastic diffusers, so were normally 'white', I used warm white LEDs with
a water clear lens. I then diffused the dome by rubbing it with some
very fine wet and dry paper, and then added some yellow felt tip. This
took the output from warm white to a colour very similar to a tungsten
lamp, which produced illumination much closer to the original bulb.

Arfa

**Cool.


--
Trevor Wilson www.rageaudio.com.au

 

[Phil Allison]

"Arfa Dickhead Daily"

** For typical red bezels or indicator lights, it is simply not visible.


It is to some of us. I find the PWM'd LED flicker of road works cone-top
beacons very annoying,

** WTF has that got to do with my comment ?????????????????

Fuck of you pathetic pommy fool.




.... Phil

 

[Phil Allison]

"Arfa Daily"

** LEDs are, believe it or not, DIODES !!

So they can be used on low voltage ( ie 6.3V ) AC supplies with only a
series resistor.


Yes. However, they are not renowned for having a very high PIV, so whilst
you would probably get away with just a series resistor at low AC,

** Jesus FUCKING CHRIST -

this IDIOT just DOES NOT READ !!!!!!!!!

 

[Arfa Daily]

"Phil Allison" <phil_a@tpg.com.au> wrote in message
news:b8sgcmF3angU1@mid.individual.net...

"Arfa Dickhead Daily"


** For typical red bezels or indicator lights, it is simply not visible.


It is to some of us. I find the PWM'd LED flicker of road works cone-top
beacons very annoying,


** WTF has that got to do with my comment ?????????????????

Fuck of you pathetic pommy fool.




... Phil

You never understand fuck all, do you ? You're so busy cutting context to
try and make your half-arsed and witless comments look clever, you never
manage to look behind the actual words. You commented about flicker at 25 Hz
that's "simply not visible" with a red bezel. My comment was that LED
flicker at that frequency might not be noticeable to *you*, but was to some
people. If you knew anything about anything, you would have understood that
traffic cone lights use LEDs, flashed at around 30 Hz, as do the stop and
tail lights of some cars. These to me, and apparently Gareth, exhibit a very
visible flicker. Since your AC connected LED would be flashing at a similar
rate, the flicker is likely to be just as visible to some people,
irrespective of whether it is being viewed through a red bezel.

And you call me a pathetic fool ? At least I'm not a dopey cunt who can't
spell, like you. Now fuck off back under your rock, unless you've got
anything of any sense to say.

Arfa

 

[Arfa Daily]

"Phil Allison" <phil_a@tpg.com.au> wrote in message
news:b8sgftF3b4iU1@mid.individual.net...

"Arfa Daily"


** LEDs are, believe it or not, DIODES !!

So they can be used on low voltage ( ie 6.3V ) AC supplies with only a
series resistor.


Yes. However, they are not renowned for having a very high PIV, so whilst
you would probably get away with just a series resistor at low AC,


** Jesus FUCKING CHRIST -

this IDIOT just DOES NOT READ !!!!!!!!!

No, it's YOU who either does not read, does not understand, or chooses not
to. All you do is snip indiscriminately to try and make yourself look
clever. Be advised that you fail royally in this endeavour. All you actually
look is an ever greater twat ...

Arfa