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8V 40mA bi-pin lamp (Marantz)

Discussion in 'Electronic Repair' started by Tim Schwartz, Sep 4, 2013.

  1. Tim Schwartz

    Tim Schwartz Guest

    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
     
  2. Phil Allison

    Phil Allison Guest

    "Tim Schwartz"

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




    ..... Phil
     
  3. **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.
     
  4. Phil Allison

    Phil Allison Guest

    "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.

    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
     
  5. Leif Neland

    Leif Neland Guest

    Phil Allison kom med følgende:
    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
     
  6. Phil Allison

    Phil Allison Guest

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

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

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

    It tried red and white leds with the same result.


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




    .... Phil
     
  7. **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.
    **Cool.
     
  8. Phil Allison

    Phil Allison Guest

    "Arfa Dickhead Daily"


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

    **** of you pathetic pommy fool.




    .... Phil
     
  9. Phil Allison

    Phil Allison Guest

    "Arfa Daily"

    ** Jesus FUCKING CHRIST -

    this IDIOT just DOES NOT READ !!!!!!!!!
     
  10. Black Iccy

    Black Iccy Guest

    Surely, it will be at the _SAME_ frequency but exist as a light
    source for only half the period (duty cycle). N'est-ce pas?
     
  11. Guest

    Are you sure they are bi-pin lamps? I own a couple Marantz receivers of that vintage (2215 and 2275), and they used "fuse lamps" which have the same dimensions as a 3AG fuse.
    The fuse lamps are readily available on eBay. You can also get them from All Electronics in Van Nuys, California; the 8V lamps are $1 each or $8.50 for 10, while 6V and 12V lamps are slightly cheaper.
     
  12. Leif Neland

    Leif Neland Guest

    Phil Allison sendte dette med sin computer:
    Have you had your Coprolalia disgnosed properly?

    The treatment could be botox at the vocal cords (would it help for
    typing? Possibly in the hands instead) or brain surgery.

    Do you know how you got it?

    If we know your bad behaviour is caused by a disease, it is easier to
    forgive.


    Leif
     
  13. He'd have to have a brain in the first place to operate on.
     
  14. Phil Allison

    Phil Allison Guest

    "Arfa Dickhead Daily"
    ** I live in Sydney.

    The subject is LED bezels.

    I was speaking from REAL experience - not making stupid guesess like you.

    And YOU are the man with defective colour vision and gods know how many
    other genetic defects.

    BTW:

    How many red LEDs have YOU used to replace the bezel lamps in Fender amps ??

    There is no sign of flicker.

    Surprising but true.


    .... Phil
     
  15. Phil Allison

    Phil Allison Guest

    "Arfa FUCKWIT Daily"

    ** FFS - you REPEATED the info in MY post back to me !!!

    You pompous, bullshitting, fucking nut case.



    ..... Phil
     
  16. Phil Allison

    Phil Allison Guest

    "Arfa Daily"
    ** But not in the post that "dave" replied to.

    My god you are a bullshitting ass.


    .... Phil
     
  17. **The 6.3 Volt bi-pin lamps are used for input selection indication and
    for the stereo beacon. The dial backlights are fuse style, 8 Volt 200ma
    types.
    **Except that the OP wanted bi-pin lamps, which are not difficult to obtain.
     
  18. Phil Allison

    Phil Allison Guest

    "Black Iccy"
    "Arfa Fuckwit Daily"

    ** AD is a colossal, bullshitting moron.

    The repetition rate is 50Hz or 60Hz, same as the field rate of a regular (
    interlaced) TV.

    Got an sine wave generator on your bench with 2.5 V rms available ?

    Connect a LED across the output and sweep the frequency across the range
    from 20 to 100Hz or so and see what happens.


    .... Phil
     
  19. Leif Neland

    Leif Neland Guest

    Phil Allison kom med denne ide:
    If you are talking about CRT-TV's, the phosphor(?) coating have
    afterglow, to reduce flickering.

    On the corner of the eye, the flickering is visible for some people on
    some monitors.

    The afterglow time varies depending on what the monitor is constructed
    for. The old IBB green monitors had a very long afterglow to make the
    image comfortable for wieving.
    When doing so, try different wavelengths, intensities and viewing
    angles.

    Flicker sensitivity varies between people.
    When you are tired, you are more sensitive.

    Perhaps your condition makes you less sensitive for flicker and proper
    behaviour.

    Leif
     
  20. Phil Allison

    Phil Allison Guest

    "Leif Neland"

    ** Same as you - pig brain.


    ** Yep.



    ** No **YOU** need to do the fucking test !!!!!!!

    Cos I have done it many times already

    You fucking, asinine, Kraut pile of shit.





    ..... Phil
     
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