[Test-Equipment] Source for miniature lamps?

[Barry]

Hi Joe,

These are the miniature T-1.75 lamps, the size of the one below:

http://parts.digikey.com/1/parts/680863-lamp-incand-t-1-3-4-6v-flange-bs-328.html

I think the #44, etc., are T-3.75 sized and won't fit here.  These are the graticule illumination lamps for an older Kikusui oscilloscope and they have to fit in a small hole behind the front panel.

I tried hi-intensity LEDs, but since they shine more "forward" than to the side, they don't illuminate the graticule properly.

I have some CM328 bulbs and I may just use them.  They're 6.3V, 200mA bulbs vs. the 150mA bulbs that were in there, but the transistor that controls them is capable of 3A so that shouldn't be a problem.  I just kind of hated to dissipate that extra wattage (albeit only 50mA) but I may just do that.  The intensity control allows me to keep the current low if I want but if someone wanted to run them at full blast well...

Thanks for the offer!  That's mighty nice of you.

Barry - N4BUQ



 On Mon 28/05/12  8:37 PM , "Joe Walden" w5jdy at cox.net sent:
> From Joe in Okla...   Do you have a number for them??  I have several
> miniature lamps..  #44  #46  #44 and others etc.   I will send you three
> orfour......   Joe
> 
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Barry" n4buq at knolo
> gy.net>To: test-equipment at mailman.qth.net>Sent: Monday, May 28, 2012 7:36 PM
> Subject: [Test-Equipment] Source for miniature lamps?
> 
> 
> > Anyone know of a source for 6.3V, 150mA, T1.75
> lamps (e.g. CM350 fromChicago Miniature, etc.)?  I can find them with minimum quantity of 10
> and$8 or better for shipping.  Considering I only need three, $15 to $20
> forthem is more than I can justify.
> >
> > Thanks!
> > Barry - N4BUQ
> >
> >
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