x27;PFC'?
>>>
>>> Thanks.
>>>
>>> Joe
>>>
>>> -Original Message-
>>> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]
>On
>>> Behalf Of Poul-Henning Kamp
>>> Sent: Saturday, June
On 6/17/13 10:39 AM, Poul-Henning Kamp wrote:
In message <51bf15a8.40...@earthlink.net>, Jim Lux writes:
The issue also arises with fluorescent [...]
As folks transitioned to the newer ballasts, the non-sinusoidal
current problem probably got worse.
I don't know about US, but in EU they mu
ps.com
To subscribe to the fun with wood group send a blank email to
funwithwood-subscr...@yahoogroups.com
- Original Message -
From: "Peter Gottlieb"
To:
Sent: Monday, June 17, 2013 7:33 AM
Subject: Re: [time-nuts] HP and other equipment failure
The current distortion fro
In message <51bf15a8.40...@earthlink.net>, Jim Lux writes:
>The issue also arises with fluorescent [...]
>
> As folks transitioned to the newer ballasts, the non-sinusoidal
>current problem probably got worse.
I don't know about US, but in EU they must have PFC correction, and
the ones I've see
That's criminal!
Tom
- Original Message -
From: "J. Forster"
To: ; "Discussion of precise time and frequency
measurement"
Sent: Monday, June 17, 2013 12:43 PM
Subject: Re: [time-nuts] HP and other equipment failure
An Audiophool and his mone
Joe
>>>
>>> -Original Message-
>>> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
>>> Behalf Of Poul-Henning Kamp
>>> Sent: Saturday, June 15, 2013 4:09 PM
>>> To: Robert Atkinson; Discussion of precise time and
Something else has gotten much worse with switchers- RFI.
While most of them are supposed to be "approved" in some way, about 80%
of them generate unacceptable levels of RF interference. So do the
supplies for the under the counter LV lamps and LED drivers.
How was the 80% figure arrived at
On 6/17/13 5:33 AM, Peter Gottlieb wrote:
The current distortion from simple transformer-rectifier-capacitor power
supplies contains a lot of third harmonic content. In a 3 phase system
(as are all distribution systems for commercial and industrial) the
third harmonic ADDS in the neutral, or cre
une 15, 2013 4:09 PM
To: Robert Atkinson; Discussion of precise time and frequency measurement
Cc: Perry Sandeen
Subject: Re: [time-nuts] HP and other equipment failure
In message <1371329221.83869.yahoomail...@web171902.mail.ir2.yahoo.com>,
Robert Atkinson writes:
While I agree with
On 16 June 2013 01:33, wrote:
> Greetings Gentlemen!
>
>
> I have been following the thread on HP equipment repair, as I have a bunch
> of it and am waiting the inevitable day when something starts to smoke.
> That being said, I agree with the gentlemen that say fixing is better than
> junking a
-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Saturday, June 15, 2013 4:09 PM
To: Robert Atkinson; Discussion of precise time and frequency measurement
Cc: Perry Sandeen
Subject: Re: [time-nuts] HP and other equipment failure
In message<1371329221.83
Re: [time-nuts] HP and other equipment failure - availability
Greetings Gentlemen!
I have been following the thread on HP equipment repair, as I have a bunch of
it and am waiting the inevitable day when something starts to smoke.
That being said, I agree with the gentlemen that say fixing is b
Greetings Gentlemen!
I have been following the thread on HP equipment repair, as I have a bunch
of it and am waiting the inevitable day when something starts to smoke.
That being said, I agree with the gentlemen that say fixing is better than
junking and also about the diminishing supply.
jlt...@att.net said:
> Sorry for the interruption but what is 'PFC'?
For terms like that, Wikipedia is often a good first try.
In this case, PFC goes to a disambiguation page and there are 9 possibilities
under. A quick scan finds the interesting one.
http://en.wikipedia.org/wiki/PFC
--
half Of Poul-Henning Kamp
Sent: Saturday, June 15, 2013 4:09 PM
To: Robert Atkinson; Discussion of precise time and frequency measurement
Cc: Perry Sandeen
Subject: Re: [time-nuts] HP and other equipment failure
In message <1371329221.83869.yahoomail...@web171902.mail.ir2.yahoo.com>,
Robert A
t;
>> Thanks.
>>
>> Joe
>>
>> -Original Message-
>> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
>> Behalf Of Poul-Henning Kamp
>> Sent: Saturday, June 15, 2013 4:09 PM
>> To: Robert Atkinson; Discussion of precis
: [time-nuts] HP and other equipment failure
Although off-topic here, the PFC (or power factor correction) is a switching
mode front-end used to correct the cos-phi of the otherwise capacitive load
that every switching mode power supply is for the mains.
On Sat, Jun 15, 2013 at 11:52 PM, J. L
time and frequency measurement
> Cc: Perry Sandeen
> Subject: Re: [time-nuts] HP and other equipment failure
>
> In message <1371329221.83869.yahoomail...@web171902.mail.ir2.yahoo.com>,
> Robert Atkinson writes:
>
>> While I agree with everything else you say,
frequency measurement
Cc: Perry Sandeen
Subject: Re: [time-nuts] HP and other equipment failure
In message <1371329221.83869.yahoomail...@web171902.mail.ir2.yahoo.com>,
Robert Atkinson writes:
> While I agree with everything else you say, you CAN have too much
> filter capacitance. At le
In message <1371329221.83869.yahoomail...@web171902.mail.ir2.yahoo.com>, Robert
Atkinson writes:
> While I agree with everything else you say, you CAN have too much
> filter capacitance. At least where dc rectifier / filter (smoothing)
> circuits are concerned. Increasing C causes increased rippl
; Discussion of precise time andfrequency measurement
> Subject: Re: [time-nuts] HP and other equipment failure
>
> Hi Perry, I was browsing a 1988 HP catalogue tonight..
> The 8566B came in at a cool 62 thousand dollars new.
> Wow!
>
>
> -marki
>
> -Original Me
5:48
Subject: [time-nuts] HP and other equipment failure
All,
There has been an on and off discussion of
equipment failure so I’d thought I’d add my experience.
First I’ve been repairing HP equipment since 1976
before many of you were born.
I now have over 16 pieces of HP test equipment and
@febo.com
Subject: [time-nuts] HP and other equipment failure
All,
There has been an on and off discussion of equipment failure so I’d thought I’d
add my experience.
First I’ve been repairing HP equipment since 1976 before many of you were born.
I now have over 16 pieces of HP test
120 volts. I know for sure that this
instrument was used in the US. Changing it to 110-120 resolved the
problem and it now runs cool. I should've checked the line voltage
setting when it arrived, but I just assumed...
Burt, K6OQK
Subject: Re: [time-nuts] HP and other equipment fa
Luciano wrote:
About the HP5370 please got o see my solution
The fans would cool the transistors better if they were blowing on
the heatsink fins, not directly at the transistors.
I use a slow fan that is large enough to blow over the whole heatsink
assembly. You can't hear it over the no
me.
Regards
Mark Spencer
--
Message: 1
Date: Fri, 14 Jun 2013 14:26:50 +
From: "Mark C. Stephens"
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] H
on of precise time and frequency measurement
> Subject: Re: [time-nuts] HP and other equipment failure
>
> On 14 June 2013 05:48, Perry Sandeen wrote:
>
> > There are two long standing truths about electronic equipment. One
> > you can't have too much filter capacitance.
on of precise time and frequency measurement
Subject: Re: [time-nuts] HP and other equipment failure
On 14 June 2013 05:48, Perry Sandeen wrote:
> There are two long standing truths about electronic equipment. One
> you can't have too much filter capacitance. Two, you can&#x
On 14 June 2013 05:48, Perry Sandeen wrote:
> There are two long standing truths about
> electronic equipment. One you can’t have
> too much filter capacitance. Two, you
> can’t cool too much. (Please spare me
> the liquid nitrogen or submarine battery
> comments.)
>
> Regards,
>
> Perrier
W
All,
There has been an on and off discussion of
equipment failure so I’d thought I’d add my experience.
First I’ve been repairing HP equipment since 1976
before many of you were born.
I now have over 16 pieces of HP test equipment and
several units now need repair.
In my experience, the
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