Bruce wrote:
...
It may be possible to stack 3 low ESR super capacitors in series
(maximum voltage rating is around 2v -2.5V those with higher ratings are
actually series connected stacks) to do this but this is a relatively
expensive proposition.
...
Presumably you would need parallel resistors
On Thu, Aug 7, 2008 at 5:59 AM, Peter Vince [EMAIL PROTECTED] wrote:
It may be possible to stack 3 low ESR super capacitors in series
(maximum voltage rating is around 2v -2.5V those with higher ratings are
actually series connected stacks) to do this but this is a relatively
expensive
Peter Vince wrote:
Bruce wrote:
...
It may be possible to stack 3 low ESR super capacitors in series
(maximum voltage rating is around 2v -2.5V those with higher ratings are
actually series connected stacks) to do this but this is a relatively
expensive proposition.
...
Anyone have a suggestion for a power supply for the
Thunderbolt?
Thanks
Mitch W4OA
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the 5V supply to see what
happens every second (presumably as the output is sent to the serial port).
Cheers
Dave
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of F Mitchell
Sent: 05 August 2008 17:24
To: time-nuts@febo.com
Subject: [time-nuts] Power supply
David C. Partridge wrote:
I'm using the Meanwell T30-B, but Tom van Baak's test on this shows a bit of
phase noise at 1Hz offset which is a tad nasty:
http://www.leapsecond.com/pages/tbolt/noise.htm
I'm wondering if this can be reduced with a bit of extra de-coupling on the
5V supply, but
measurement
time-nuts@febo.com
Sent: Tuesday, August 05, 2008 3:43 PM
Subject: Re: [time-nuts] Power supply for Thunderbolt
David C. Partridge wrote:
I'm using the Meanwell T30-B, but Tom van Baak's test on this shows a bit
of
phase noise at 1Hz offset which is a tad nasty:
http
Bob Q wrote:
I had a similar problem with my home-brew design. I found a blip with 1
second period on the output of the error amplifier. I couldn't eliminate
it with extra power supply filtering. The high gain of the error amplifier
picked up a very small voltage that developed on
David C. Partridge wrote:
I'm using the Meanwell T30-B, but Tom van Baak's test on this shows a bit of
phase noise at 1Hz offset which is a tad nasty:
http://www.leapsecond.com/pages/tbolt/noise.htm
I'm wondering if this can be reduced with a bit of extra de-coupling on the
5V supply, but
I use this one:
http://www.mouser.com/Search/ProductDetail.aspx?qs=RCLU9o6%252bptzs793RA%252bLWWg%3d%3d
Mouser p/n 826-LPT43
Seems to work OK.
Steve N5EN
Message: 1
Date: Tue, 5 Aug 2008 11:23:46 -0500
From: F Mitchell [EMAIL PROTECTED]
Subject: [time-nuts] Power supply for Thunderbolt
Hello
everyone discuss about the power supply of Thunderbolt
First i am the ebay sales from china
You can buy this GPS DO from me at nice price $219 compare with Aibin,
VA3GUO $240
my ebay id fluke.l
Item number: 300216825851
About the power supply
i use with meanwell Q-120DEY
input
: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Dave Brown
Sent: 21 April 2008 23:10
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Power supply for Thunderbolt
Hi David- that Meanwell unit looks a good choice.
:
:
Regards
DaveB, NZ
David C. Partridge wrote:
I'm in the process of buying a Thunderbolt, and will need to provide it with
some volts.
I sat down over the weekend to design a linear supply for it. Initially
things looked OK using a 12-0-12 transformer, and a few IC voltage
regulators, but then I did some worst
I'm in the process of buying a Thunderbolt, and will need to provide it with
some volts.
I sat down over the weekend to design a linear supply for it. Initially
things looked OK using a 12-0-12 transformer, and a few IC voltage
regulators, but then I did some worst case design and dissipation
Dear David,
I have no recipe for your thunderbolt powersupply, but the Ebay power
supply you mention is not a linear power supply but a switching power
supply!
I have two Thunderbolts however, these boards came from Telecom and have
a 48V switcher built in. So I use them in the same way as I
David,
I use a Mean Well. Model: T-30B with my Thunderbolt. See
http://www.meanwell.com/search/T-30 for details. It is about the same
dimensions (slightly higher) as the GPSDO. I got mine from Aibin,
VA3GUO, and it was only slightly more expensive than the unit you
referenced on Ebay.
Alternatively since you only need 25mA @ +12V, 25mA @ -12V and 300mA
@+5V (if I'm reading the right datasheet) you can use a much lower
voltage output transformer suited to the 5V regulator and use a pair of
voltage doublers or triplers to feed your 12V regulators.
A 7.5- 0 - 7.5V
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of [EMAIL PROTECTED]
Sent: 21 April 2008 14:46
To: time-nuts
Subject: Re: [time-nuts] Power supply for Thunderbolt
I also purchased from Aibin Guo a Mean Well. Model: T-30B power supply
- Original Message -
From: David C. Partridge [EMAIL PROTECTED]
To: 'Discussion of precise time and frequency measurement'
time-nuts@febo.com
Sent: Monday, April 21, 2008 8:40 PM
Subject: [time-nuts] Power supply for Thunderbolt
I'm in the process of buying a Thunderbolt
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