{Collins} S-line bulbs



Compare these specs:

#51 7.5V .22A-  MSCP (CANDLEPOWER) 1.00 Average life 1000 hours.

#47 6.3V .15A-  MSCP (CANDLEPOWER) .22 Average life  3000 hours.

#755 6.3v .15A-  MSCP (CANDLEPOWER) .33 Average life 20,000 hours.

Another thing to consider is that every time you unplug to pilot light
socket to replace the bulb you 
risk the possibility of some meter case material being broken loose which
may cause this material be
be lodged between the magnet and the moving coil.  I have repaired many
of these meters which has
had this problem.  Using the #755, because of its longevity, reduces this
problem.

My two cents worth

J
W7KSG
.
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