The "NAKED" 5065A optical unit
Here is a PIX of the optical unit from a 5065A totally removed from the
shield assembly.
Left to right:
Lamp assy
lamp oven cylinder
lamp reflector/convection block/diffuser
Rb85 filter cell
cell oven cylinder/cavity
Rb87 resonance cell
Enjoy!
Cheers,
Corby
In message AABPJY7PFAJKDQYS@smtpout01.dca.untd.com, cdelect@juno.com writes:
Here is a PIX of the optical unit from a 5065A totally removed from the
shield assembly.
Nice!
Left to right:
Lamp assy
lamp oven cylinder
lamp reflector/convection block/diffuser
Rb85 filter cell
It looks like there is a square filter of some kind
between the reflector and the filter cell ?
I've been thinking a little bit more about power for the lamp assembly.
Since I have the lamp on the bench-supply I am going to plot lamp
voltage vs. photo-I because it looks like a threshold rather than
a linear relationship.
If that is the case, I think it will make sense to give the lamp
its own adjustable voltage regulator (LM317), so the power can be
reduced to what is optimal/necessary without having to take the
lamp apart and change a resistor.
A 1R resistor between the 22-30V supply and the LM317 will make it
easy to monitor lamp current, and a 300mA short-circuit protection
is a nice bonus.
If need be, the regulator could start out at 20V and drop to something
lower in a matter of minutes.
Actually, now that I think about it, I should try to measure if it
is gives better stability if I drive the lamp with constant current,
constant power, constant voltage or constant photo-I...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
Hi
Indeed very cool pictures.
If the lamp is like most gas bulb lights, there is indeed a “strike voltage” required
to get things going (or an RF excitation). There inevitably is some temperature
dependence as well. A constant current driver might be the better bet.
Bob
On Feb 20, 2018, at 4:30 AM, Poul-Henning Kamp phk@phk.freebsd.dk wrote:
In message AABPJY7PFAJKDQYS@smtpout01.dca.untd.com, cdelect@juno.com writes:
Here is a PIX of the optical unit from a 5065A totally removed from the
shield assembly.
Nice!
Left to right:
Lamp assy
lamp oven cylinder
lamp reflector/convection block/diffuser
Rb85 filter cell
It looks like there is a square filter of some kind
between the reflector and the filter cell ?
I've been thinking a little bit more about power for the lamp assembly.
Since I have the lamp on the bench-supply I am going to plot lamp
voltage vs. photo-I because it looks like a threshold rather than
a linear relationship.
If that is the case, I think it will make sense to give the lamp
its own adjustable voltage regulator (LM317), so the power can be
reduced to what is optimal/necessary without having to take the
lamp apart and change a resistor.
A 1R resistor between the 22-30V supply and the LM317 will make it
easy to monitor lamp current, and a 300mA short-circuit protection
is a nice bonus.
If need be, the regulator could start out at 20V and drop to something
lower in a matter of minutes.
Actually, now that I think about it, I should try to measure if it
is gives better stability if I drive the lamp with constant current,
constant power, constant voltage or constant photo-I...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
I'm curious:
Is the lamp RF-excited, or by DC going to internal electrodes?
And if by RF, is the energy coupled in magnetically by a loop,
or by capacitive electrodes?
Thanks,
Dana
On Mon, Feb 19, 2018 at 7:08 PM, cdelect@juno.com wrote:
Here is a PIX of the optical unit from a 5065A totally removed from the
shield assembly.
Left to right:
Lamp assy
lamp oven cylinder
lamp reflector/convection block/diffuser
Rb85 filter cell
cell oven cylinder/cavity
Rb87 resonance cell
Enjoy!
Cheers,
Corby
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/
mailman/listinfo/time-nuts
and follow the instructions there.
Wow on the right, is that the lamp?
Thats one large lamp to light. I am use to the little capsules about the
size of a pr-1 light bulb.
This is a keeper picture.
Regards
Paul
WB8TSL
On Tue, Feb 20, 2018 at 8:24 AM, Bob kb8tq kb8tq@n1k.org wrote:
Hi
Indeed very cool pictures.
If the lamp is like most gas bulb lights, there is indeed a “strike
voltage” required
to get things going (or an RF excitation). There inevitably is some
temperature
dependence as well. A constant current driver might be the better bet.
Bob
On Feb 20, 2018, at 4:30 AM, Poul-Henning Kamp phk@phk.freebsd.dk
wrote:
writes:
Here is a PIX of the optical unit from a 5065A totally removed from the
shield assembly.
Nice!
Left to right:
Lamp assy
lamp oven cylinder
lamp reflector/convection block/diffuser
Rb85 filter cell
It looks like there is a square filter of some kind
between the reflector and the filter cell ?
I've been thinking a little bit more about power for the lamp assembly.
Since I have the lamp on the bench-supply I am going to plot lamp
voltage vs. photo-I because it looks like a threshold rather than
a linear relationship.
If that is the case, I think it will make sense to give the lamp
its own adjustable voltage regulator (LM317), so the power can be
reduced to what is optimal/necessary without having to take the
lamp apart and change a resistor.
A 1R resistor between the 22-30V supply and the LM317 will make it
easy to monitor lamp current, and a 300mA short-circuit protection
is a nice bonus.
If need be, the regulator could start out at 20V and drop to something
lower in a matter of minutes.
Actually, now that I think about it, I should try to measure if it
is gives better stability if I drive the lamp with constant current,
constant power, constant voltage or constant photo-I...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by
incompetence.
mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/
mailman/listinfo/time-nuts
and follow the instructions there.
Should have carefully read Corby's comment.
Lamps left.
On Tue, Feb 20, 2018 at 9:40 AM, paul swed paulswedb@gmail.com wrote:
Wow on the right, is that the lamp?
Thats one large lamp to light. I am use to the little capsules about the
size of a pr-1 light bulb.
This is a keeper picture.
Regards
Paul
WB8TSL
On Tue, Feb 20, 2018 at 8:24 AM, Bob kb8tq kb8tq@n1k.org wrote:
Hi
Indeed very cool pictures.
If the lamp is like most gas bulb lights, there is indeed a “strike
voltage” required
to get things going (or an RF excitation). There inevitably is some
temperature
dependence as well. A constant current driver might be the better bet.
Bob
On Feb 20, 2018, at 4:30 AM, Poul-Henning Kamp phk@phk.freebsd.dk
wrote:
writes:
Here is a PIX of the optical unit from a 5065A totally removed from the
shield assembly.
Nice!
Left to right:
Lamp assy
lamp oven cylinder
lamp reflector/convection block/diffuser
Rb85 filter cell
It looks like there is a square filter of some kind
between the reflector and the filter cell ?
I've been thinking a little bit more about power for the lamp assembly.
Since I have the lamp on the bench-supply I am going to plot lamp
voltage vs. photo-I because it looks like a threshold rather than
a linear relationship.
If that is the case, I think it will make sense to give the lamp
its own adjustable voltage regulator (LM317), so the power can be
reduced to what is optimal/necessary without having to take the
lamp apart and change a resistor.
A 1R resistor between the 22-30V supply and the LM317 will make it
easy to monitor lamp current, and a 300mA short-circuit protection
is a nice bonus.
If need be, the regulator could start out at 20V and drop to something
lower in a matter of minutes.
Actually, now that I think about it, I should try to measure if it
is gives better stability if I drive the lamp with constant current,
constant power, constant voltage or constant photo-I...
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by
incompetence.
ailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/m
ailman/listinfo/time-nuts
and follow the instructions there.
Its RF and mag loop.
On Tue, Feb 20, 2018 at 8:49 AM, Dana Whitlow k8yumdoober@gmail.com wrote:
I'm curious:
Is the lamp RF-excited, or by DC going to internal electrodes?
And if by RF, is the energy coupled in magnetically by a loop,
or by capacitive electrodes?
Thanks,
Dana
On Mon, Feb 19, 2018 at 7:08 PM, cdelect@juno.com wrote:
Here is a PIX of the optical unit from a 5065A totally removed from the
shield assembly.
Left to right:
Lamp assy
lamp oven cylinder
lamp reflector/convection block/diffuser
Rb85 filter cell
cell oven cylinder/cavity
Rb87 resonance cell
Enjoy!
Cheers,
Corby
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/
mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/
mailman/listinfo/time-nuts
and follow the instructions there.
Corby
Really appreciate the pix.
Curious. How hard was it to open the oven up and then is it equally
reasonable to re-assemble it.
I will guess its reasonable since you insert the filter into the system.
Really curious do you see the bulb darken as if the RB is plating out?
Thats what I see on older small FE RB's.
Thank you.
Paul
WB8TSL
On Tue, Feb 20, 2018 at 11:32 AM, paul swed paulswedb@gmail.com wrote:
Its RF and mag loop.
On Tue, Feb 20, 2018 at 8:49 AM, Dana Whitlow k8yumdoober@gmail.com
wrote:
I'm curious:
Is the lamp RF-excited, or by DC going to internal electrodes?
And if by RF, is the energy coupled in magnetically by a loop,
or by capacitive electrodes?
Thanks,
Dana
On Mon, Feb 19, 2018 at 7:08 PM, cdelect@juno.com wrote:
Here is a PIX of the optical unit from a 5065A totally removed from the
shield assembly.
Left to right:
Lamp assy
lamp oven cylinder
lamp reflector/convection block/diffuser
Rb85 filter cell
cell oven cylinder/cavity
Rb87 resonance cell
Enjoy!
Cheers,
Corby
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/
mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/m
ailman/listinfo/time-nuts
and follow the instructions there.
On Tue, Feb 20, 2018 at 2:30 AM, Poul-Henning Kamp phk@phk.freebsd.dk
wrote:
If that is the case, I think it will make sense to give the lamp
its own adjustable voltage regulator (LM317), so the power can be
reduced to what is optimal/necessary without having to take the
lamp apart and change a resistor.
I don't know anything about these devices, but for TCXOs, the power supply
noise significantly affects the phase noise of the output. An LM317 is not
well specified for noise and I expect is is orders of magnitude worse than
something like an LT3042 low noise regulator.
Regards,
Mark
On Tue, 20 Feb 2018 09:36:49 -0700
Mark Goldberg marklgoldberg@gmail.com wrote:
I don't know anything about these devices, but for TCXOs, the power supply
noise significantly affects the phase noise of the output. An LM317 is not
well specified for noise and I expect is is orders of magnitude worse than
something like an LT3042 low noise regulator.
It's >30dB for broadband noise, according to Gerhard Hoffmann's measurement:
https://www.flickr.com/photos/137684711@N07/24070698809/in/album-72157662535945536/
Attila Kinali
--
It is upon moral qualities that a society is ultimately founded. All
the prosperity and technological sophistication in the world is of no
use without that foundation.
-- Miss Matheson, The Diamond Age, Neil Stephenson