I'd like to thank everyone who helped me with my problem of relamping
my SPR-4. I found what may have been the last box of #47 bulbs in the
country and put them in.
Someone on another list used replacement bulbs from http://www.superbrightleds.com/
and was happy with them.
I went to their website and found they had a direct replacement for
the #47 bulb. It is a white LED, with the same output (180 degree) as
an incandescent bulb, works with AC or DC and has about the same
resistance, so you can use them where you have two of them in series.
They were $2 each, with a $25 minimum order. The good news is that
they ship USPS, so for under $6 shipping, they arrived in my mailbox
in a week.
For comparison, a regular bulb store I found that would ship overseas
wanted $13 for the bulbs and $15 shipping, and Farnell has $35 minimum
shipping fee.
I put them in my SPR-4 and I am happy with them. They are white as in
daylight (5500K color temp) versus the #47 bulbs which were white as
in regular incandescent bulbs (3200K or less, much more red). The
SPR-4 uses them in two ways. One is with a blue(ish) filter for the S-
Meter and tuning dial, and they work fine.
The third bulb is more complicated, it is used to show the frequency
range, and bandswitch and preselector settings. The filter it goes
through is clear in the center to highlight the correct settings in
"white" and the edges in blue. This also works perfectly.
They also have 12 and 24 volt versions, and blue, green and red colors.
73,
Geoff.
--
geoffrey mendelson N3OWJ/4X1GM
Jerusalem Israel [email protected]
New word I coined 12/13/09, "Sub-Wikipedia" adj, describing knowledge
or understanding, as in he has a sub-wikipedia understanding of the
situation. i.e possessing less facts or information than can be found
in the Wikipedia.
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