|
It
will be the filament rattling due to the sudden application of current when
dimmed. The surge creates a magnetic field which physically moves the
coiled
filament of the lamp. The vibration will be travelling ip the pins and
getting
amplified by the ceramic holder which is obviously a bit "loose". It will
be
worst at about 50% brightness.
Can
you apply any sort of heat resistant sealant to dampen the vibration of the
connector?
Keith
I
have just bought some 50w 12v halogen bulbs and fittings ... they're going
to
be running from an LW11G German style wall light switch but I've also
tested
them on a mechanical dimmer too and they exhibit the same "problem" on
both.
The
problem is that the lamp unit itself buzzes when the lamp is dimmed ... at
full brightness they make no noise but when dimmed they buzz loudly - the
buzzing can be eliminated by holding the ceramic connector that goes onto
the
back of the bulb between the fingers. I have other 12v halogens that are
not
the same design but do not buzz when dimmed - my question is, is this
"normal" behaviour? It is definitely not the transformers that buzz however
they are electronic ones and possibly that is the reason - would wound
transformers help?
I
would have used 240v halogens but can't as I need a tight 8 or 10
degree beam to use as directed reading lights and I have been unable
to
source that design of 240v bulb.
Phil
For
more information: http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe:
ukha_d-subscribe@xxxxxxx
Unsubscribe:
ukha_d-unsubscribe@xxxxxxx
List owner:
ukha_d-owner@xxxxxxx
Your use of Yahoo! Groups is
subject to the Yahoo! Terms of
Service.
| Yahoo! Groups
Sponsor |
ADVERTISEMENT
;) |
|
|
For more information: http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe: ukha_d-subscribe@xxxxxxx
Unsubscribe: ukha_d-unsubscribe@xxxxxxx
List owner: ukha_d-owner@xxxxxxx
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
|