Back In The Real World III
 

OK, this one's a bit different (apologies if the cut & paste goes awry):

--------------------------------------------
"Hi Keith,
I stumbled upon your website in attempts to find info on fixing my Garrard
DD-75. It still works really well, but the light for the pitch control
burned out. The weird thing is, if I shine a flashlight on the light bulb,
it will illuminate for approximately 10 seconds. I can see that this bulb
is no ordinary bulb. Any recommendations on how fix it?"

-----------------------------------------------------------------



I don't know the answer. Presumably the light is a neon? If so, will any
neon that *will fit* do?



TIA



;-)

Back In The Real World III
 

"Keith G" wrote in message
...


OK, this one's a bit different (apologies if the cut & paste goes awry):

--------------------------------------------
"Hi Keith,
I stumbled upon your website in attempts to find info on fixing my Garrard
DD-75. It still works really well, but the light for the pitch control
burned out. The weird thing is, if I shine a flashlight on the light
bulb, it will illuminate for approximately 10 seconds. I can see that
this bulb is no ordinary bulb. Any recommendations on how fix it?"

-----------------------------------------------------------------



I don't know the answer. Presumably the light is a neon? If so, will any
neon that *will fit* do?



Oh well, if I've ****ed Don off I might as well give up and tell him to use
a couple of paper 'strobe disks' - no other bugger here will have a clue....

:-P

Back In The Real World III
 

Keith G wrote

Keith G wrote

I don't know the answer. Presumably the light is a neon? If so, will any neon
that *will fit* do?

Oh well, if I've ****ed Don off I might as well give up and tell him to use a
couple of paper 'strobe disks' - no other bugger here will have a clue....

The strobe is timed by a family of little cockroaches. Perhaps the HT has come
adrift from their ferris wheel, or perhaps they are in bed with flu.

Or it is a discharge lamp equally on the margin of being shagged out, and a
torch is just enough to trigger it until it gets warm.

Just to save you the embarrassment of talking to yourself.

What colour is the light? Could it feasibly be some other form of discharge
lamp? Neons are commonly used in cheap automotive strobes. The good ones have
the same as electronic camera flash heads...what's that, xenon?

I would guess a replacement of same type and physical size should give similar
brightness, require similar voltage, and draw similar current. Could be wrong.
What is it connected to, mains? Watch out for possibility of dropper resistor
incorporated, possibly into a lead.

If you want a question answering, you should post a stupid theory about how you
already know the answer.

cheers, Ian

Back In The Real World III
 

"Ian Iveson" wrote in message
o.uk...
Keith G wrote

Keith G wrote

I don't know the answer. Presumably the light is a neon? If so, will any
neon that *will fit* do?

Oh well, if I've ****ed Don off I might as well give up and tell him to
use a couple of paper 'strobe disks' - no other bugger here will have a
clue....

The strobe is timed by a family of little cockroaches. Perhaps the HT has
come adrift from their ferris wheel, or perhaps they are in bed with flu.

Or it is a discharge lamp equally on the margin of being shagged out, and
a torch is just enough to trigger it until it gets warm.


I'd be inclined to go with the 'roach theory...


Just to save you the embarrassment of talking to yourself.


:-)



What colour is the light? Could it feasibly be some other form of
discharge lamp? Neons are commonly used in cheap automotive strobes. The
good ones have the same as electronic camera flash heads...what's that,
xenon?


I've no idea about the actual deck - it was an email I received. (It would
30+ years old - did they have Xenon lamps then??)


I would guess a replacement of same type and physical size should give
similar brightness, require similar voltage, and draw similar current.
Could be wrong. What is it connected to, mains? Watch out for possibility
of dropper resistor incorporated, possibly into a lead.


OK, so what you are saying is send the guy a couple of jpegs so's he can
print out a couple of strobe disks (33/45) to 'set and forget' the speeds
and tell him not to attempt to gouge the deck out to fit a possibly
unavailable replacement bulb into an area which is basically one big,
complicated piece of plastic (and more than just a few wires) just so he can
fret about the dots creeping about according to the particular wind
direction on any given day!!??

OK, sounds good to me - thanks for your help!!


If you want a question answering, you should post a stupid theory about
how you already know the answer.


Good ploy - I'll remember that!! ;-)

Back In The Real World III
 

On Wed, 22 Mar 2006 19:53:19 +0000, Keith G wrote:



OK, this one's a bit different (apologies if the cut & paste goes awry):

--------------------------------------------
"Hi Keith,
I stumbled upon your website in attempts to find info on fixing my Garrard
DD-75. It still works really well, but the light for the pitch control
burned out. The weird thing is, if I shine a flashlight on the light bulb,
it will illuminate for approximately 10 seconds. I can see that this bulb
is no ordinary bulb. Any recommendations on how fix it?"

-----------------------------------------------------------------



I don't know the answer. Presumably the light is a neon? If so, will any
neon that *will fit* do?



Given the age of the deck it's almost certainly a neon. Yep, just about
any should be ok. I suspect that the design used a highish current
(for a neon) though as it is being used for illumination rather than
indication. It probably has about 220k in series on 220/240v. It could
even be that the series resistor has "gone high" through running warm over
a long period. The neons tend to "silver" the inside of the glass, making
it translucent and cutting down the light output.

--
Mick (Working in a M$-free zone!)
Remove blockage to use my email address
Web: http://www.nascom.info & http://mixpix.batcave.net

Back In The Real World III
 

"mick" wrote


Given the age of the deck it's almost certainly a neon. Yep, just about
any should be ok. I suspect that the design used a highish current
(for a neon) though as it is being used for illumination rather than
indication. It probably has about 220k in series on 220/240v. It could
even be that the series resistor has "gone high" through running warm over
a long period. The neons tend to "silver" the inside of the glass, making
it translucent and cutting down the light output.


Thanks Mick - I'll pass all that on, but I still the most effective/line of
least resistance is the paper strobe rings and for him to stop fussing with
it. I've got a similar strobe on me Pioneer deck and I haven't looked at it
for at *least* six months!!

(Which, of course, means I probably will later on!! :-)

Back In The Real World III
 

What colour is the light? Could it feasibly be some other form of
discharge
lamp? Neons are commonly used in cheap automotive strobes. The good ones
have
the same as electronic camera flash heads...what's that, xenon?


The light for looking at the strobe lines on my DD75 is orange. Does it have
to be a special bulb? As long as you can see the lines clearly through the
little window does it matter?

Phil

Back In The Real World III
 

"Philip North" wrote in message
...

What colour is the light? Could it feasibly be some other form of
discharge
lamp? Neons are commonly used in cheap automotive strobes. The good ones
have
the same as electronic camera flash heads...what's that, xenon?


The light for looking at the strobe lines on my DD75 is orange. Does it
have
to be a special bulb? As long as you can see the lines clearly through the
little window does it matter?



No!

(As long as the lines aren't whizzing round too fast!! ;-)

Back In The Real World III
 

"Keith G" wrote in message
...

"Philip North" wrote in message
...

What colour is the light? Could it feasibly be some other form of
discharge
lamp? Neons are commonly used in cheap automotive strobes. The good
ones
have
the same as electronic camera flash heads...what's that, xenon?


The light for looking at the strobe lines on my DD75 is orange. Does it
have
to be a special bulb? As long as you can see the lines clearly through
the
little window does it matter?



No!

(As long as the lines aren't whizzing round too fast!! ;-)

Tell him to keep chucking any old bulb in until he finds one that doesn't go
pop then. If he's in the UK Halfords will be full of them, especially in a
fetching "Chav" blue.

Back In The Real World III
 

"Philip North" wrote


The light for looking at the strobe lines on my DD75 is orange. Does it
have
to be a special bulb? As long as you can see the lines clearly through
the
little window does it matter?



No!

(As long as the lines aren't whizzing round too fast!! ;-)

Tell him to keep chucking any old bulb in until he finds one that doesn't
go
pop then. If he's in the UK Halfords will be full of them, especially in a
fetching "Chav" blue.


Ah....

(Chav blue, eh??)

You're going to *love* my new computer then!! :-)