w1...@outlook.com said:
> I would have expected a sticker somewhere, but nothing found. I'll hit it
> with 28vdc and see if any "Magic Smoke" issues forth.
The kind of DC-DC converter I'm talking about is often called a brick. That's
a standard size, roughly 2x2x1/2 inches. The older ones
The standard config for telecom equipment that runs on +24V or -48V is that
they have an isolated input DC-DC converter in them. The input voltage goes
through a full bridge rectifier that makes them insensitive to input voltage
polarity. On the ones that I have played with they worked fine
The power supply is auto sensing and spec'd at +24V or -48V, which implies the
polarity would be the same in either case, but the auto sensing doesn't seem to
imply sensing right across that range.
24 V range is 22 to 28 V at 6A, -48V range is -40.5 to -57V at 3A, I don't
recall checking what
ursday, March 14, 2019 10:12 PM
To: Discussion of precise time and frequency measurement
Cc: hmur...@megapathdsl.net
Subject: Re: [time-nuts] LMU300 Connectors
> The outside of the box specs current need at 24vdc and 48vdc. Does the
> Power Supply recognize the voltage level or do I need
, March 14, 2019 10:12 PM
To: Discussion of precise time and frequency measurement
Cc: hmur...@megapathdsl.net
Subject: Re: [time-nuts] LMU300 Connectors
> The outside of the box specs current need at 24vdc and 48vdc. Does the Power
> Supply recognize the voltage level or do I need
> The outside of the box specs current need at 24vdc and 48vdc. Does the Power
> Supply recognize the voltage level or do I need to dig into it further ?
There is a large collection of DC-DC converters available. A 2:1 range on the
input voltage is common, but they usually are centered on
-
via time-nuts
Sent: Thursday, March 14, 2019 2:25 PM
To: time-nuts@lists.febo.com
Cc: gandal...@aol.com
Subject: [time-nuts] LMU300 Connectors
Ah, thanks for the update, sounds like I need to take a closer look:-)
Nigel, GM8PZR
Thank you for your kind explanation.I was just intrigued by
Ah, thanks for the update, sounds like I need to take a closer look:-)
Nigel, GM8PZR
Thank you for your kind explanation.I was just intrigued by those connectors
that I didn't know.
It's also possible to rescue 6 VCOs from micro circuits and perhaps
others components hidden behind their shield.
Sent: Thursday, 14 March 2019 17:18
To: time-nuts@lists.febo.com
Cc: gandal...@aol.com
Subject: [time-nuts] LMU300 Connectors
They're QMA connectors, a Google search will find them, but not sure if that
will help very much.
Your mileage may vary but I quickly decided that whilst buying the complete
They're QMA connectors, a Google search will find them, but not sure if that
will help very much.
Your mileage may vary but I quickly decided that whilst buying the complete
unit was an excellent way to purchase the GPSDO in new condition, at the price
they were selling for then anyway, there
Hi Everyone,
Could someone help me identify connectors used on LMU300 from TruePosition?
A picture can be found on http://www.on4jln.be/connector.jpg
Thanks for your help.
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