Cortland Richmond wrote:
SNIP
Outside antennas here in the USA have to comply with the National
Electrical Code, and there must likewise be similar standards in Europe.
SNIP
Happened to be browsing the NEC (NFPA 70) today and came across this
section related to amateur antennas in the
Hello,
I brought a frequency doubler from marki Microwave
mix...@markimicrowave.com
408-778-4200
From: richwo...@tycoint.com [mailto:richwo...@tycoint.com]
Sent: Friday, August 29, 2003 11:41 AM
To: emc-p...@majordomo.ieee.org
Subject: Extending Freq Range of Sig Gen
I need to
Richard:
Generating a second harmonic is easier, using a push-push diode doubler. MCL
(Mini-Circuits Lab) should have some available at reasonable cost, but I
didn't check their catalog. You could also build one yourself if you have
the parts and facility. I know this doesn't get 10 GHz., but it
Richard,
that is a good way to do it. A single-diode clamp will result in even
harmonics- a doubler. Using two diodes back-to-back will give odd harmonics- a
tripler. Schottky diodes might be nice.
Another route is to use an off-the-shelf doubler. The Mini-circuits KBA-20
doubler has an output
The easiest way to generate harmonics would be to hook up a pair of
Schottky low capacitance (usually also low breakdown voltage) diodes in an
antiparallel arrangement, and then connect the pair either shunting the RF
signal, or in series with the RF signal. One way may be more successful
Agreed -- keep the dipoles high enough so no one can walk into them...
Best Regards,
Michael Hopkins
Manager, EMC Technologies
Thermo Electron
Control Technology Division
EMC ESD Simulation Solutions
One Lowell Research Center
Lowell, MA 01852
Tel: +1 978 275 0800 ext. 334
Fax: +1 978 275 0850
if you happen to have TWT amplifiers laying around (2 - 8 GHz and 8-18 GHz
models are common), they will produce harmonics for you without any effort
at all on your part.
From: richwo...@tycoint.com
Reply-To: richwo...@tycoint.com
Date: Fri, 29 Aug 2003 14:40:51 -0400
To:
I read in !emc-pstc that Mike Hopkins michael.hopk...@thermo.com wrote
(in 49CD487E8BA9D31181190060081C6B8FA271C3@COMSERVER) about 'antennas'
on Fri, 29 Aug 2003:
I believe amateur radio products are exempt from the EN's. someone
correct me if I'm wrong.
Not exactly. Non-commercial
I read in !emc-pstc that Price, Ed ed.pr...@cubic.com wrote (in
b78135310217d511907c0090273f5190d0c...@curly.ds.cubic.com) about
'antennas' on Fri, 29 Aug 2003:
I wonder if ham antennas (and/or their supporting towers) in the EU
might be considered as structures, and subject to some
I need to characterize a filter up to 10 GHz, but my signal generator has a
top end of 4 GHz. Is there a simple means of generating a third harmonic
from a signal generator while maintaining a 50 ohm source impedance? My
thinking is that a diode circuit should be able to create the harmonics and
The Commission requires registration, and high visibility paint and
lighting for Amateur (and other) antennas and towers more than a certain
height above ground level, and coordination with the FAA. Recently, they've
required evaluation for RF safety. Authorities probably have like rules in
Chris,
Does this product have resistive voltage dividers that cross the isolation
boundary, or something similar? Without know the specifics of your product,
I can offer only a couple of suggestions.
I have seen cases where the hipot causes damage but and the product is in
full compliance with
All,
Also, check out the safety articles in the Product Safety newsletter. The
Technically Speaking by Rich Nute provide good information.
http://www.ewh.ieee.org/soc/emcs/pstc/psn/
There's an index at the very bottom.
Frank Dominguez
Product Regulations Engineer
Hewlett-Packard Company
3404
Paul,
On Thu, 28 Aug 2003 09:41:53 +0800,
Paul Chan ncc...@tuvps.com.hk wrote:
Thanks for your information. May I ask a few more questions regarding
compliance to EMC in Japan for non-specific electrical appliances, Is it
voluntary or mandatory?
Mandatory for many of products covered the
-Original Message-
From: Mike Hopkins [ mailto:michael.hopk...@thermo.com]
Sent: Friday, August 29, 2003 6:34 AM
To: 'drcuthb...@micron.com'; emc-p...@majordomo.ieee.org
Subject: RE: antennas
I believe amateur radio products are exempt from the EN's. someone
correct me if
Hello David,
See: www.safetylink.com/bookshop.html for a list of electrical safety
compliance and emc resources.
Regards, Art Michael
On Fri, 29 Aug 2003 david.gra...@realcompliance.com wrote:
Hello Group,
Does anybody have any recommendations for books on electrical / mechanical
The economy takes another hit in the compliance community.
If anyone know of either a contract or FT opportunity, please send me a short
e-mail off the forum.
geta...@worldnet.att.net
experience in compliance, design and manufacturing engineering.
thank you,
Gerald Tammi
508-435-5877
David
ITL has a web site free for use on safety for ITE products.
http://www.i-spec.com/ http://www.i-spec.com/
Additional site on Medical equipment
www.601help.com
On 601help you have some book references in safety.
Ilan Cohen
Technical Director, Safety Telecom Divisions
I.T.L
I read in !emc-pstc that Gordon,Ian ian.gor...@bocedwards.com wrote
(in E1BA0362B28ED211A1E80008C71EA3060206FD63@z-
160-100-30-252.est.ibm.com) about 'Product standard for telescope' on
Fri, 29 Aug 2003:
and John Childs of BSI. ( Don't tell them I sent you
otherwise they will never reply to me
Ed:
Thanks for this pointer !
This study is available here:
http://www.jsc.mil/jsce3/emcslsa/stdlib/LibDisplay.asp?folder=eps
http://www.jsc.mil/jsce3/emcslsa/stdlib/docs/Engineering_Guides/GUIDEfinal.pdf
and is part of the E3 Documents Library
Hello Group,
Does anybody have any recommendations for books on electrical / mechanical
safety?
Many thanks,
Dave Graham.
All
I can appreciate Derek Walton's dilemma about what standard to apply for
such a device as I have come across the same sort of issue with some of our
equipment. Certain products can be sold into both large industrial
installations or smaller retail outlets, such as an opticians shop which may
I read in !emc-pstc that drcuthb...@micron.com wrote (in E6F64B42266D6
54b80a0f7f4b98212a5cf1...@ntxboimbx03.micron.com) about 'antennas' on
Thu, 28 Aug 2003:
Does anyone know what standards would cover Amateur Radio Antennas in
Europe?
There are no standards as such. There are restrictions on
I read in !emc-pstc that Chris Maxwell chris.maxw...@nettest.com wrote
(in 83d652574e7af740873674f9fc12dbaa0189d...@utexh1w2.gnnettest.com)
about 'Hi-Pot testing' on Thu, 28 Aug 2003:
The hipot test burned out the rectifier.
Well, it absolutely ought not to have done. The hipot test is applied
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