Even simpler is a 80m dipole fed with balanced line to a tuner for all band
use. The window line is less costly than coax. A good quality tuner is
less lossy in multiband use than coax/ tuner balun, etc.. Balanced antennas
have fewer problems than off center feeds. Balanced line to dipole does
The Force 12 vertical dipoles are Excellent, and do not require radials, as
Cebik notes in his models of vertical dipoles. A dipole is complete unto
itself as a radiating antenna. In the far field , good RF earth can help
this one like any antenna with its far reflections, but up close to it, it
Keith, I suggest you get Walter Maxwells book Reflections II and read it
cover to cover a few times. It takes time to grasp all the good antenna
info he has in there. But, it corrects the many myths most hams have heard.
The tuner really tunes your line and antenna as a system!
Reflections II ca
Silica gel is available in little pillows commercially for insertion into
other packages.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub et
Actually, Jack very little electronics is outside the building, but inside
the inside air conditioner unit. Outside is the compressor, and a relay.
In some parts of Tx, the outside residential units fail regularly, becauser
the field of electric current for the relay attracts fire ants who try to
I mis remembered, it was a 9 MHz VFO in the radio I described, the one from
ZL1AAX, apparently.
Thanks math gurus.
73
Stuart
Hi,
Indeed, vibration in mobile transport creates triboelectricity, a charge
build up by friction of wires insulations against conductors. It could be
not the foam of the box, (which usually is grey or black indicating carbon
content) but the wiring inside the radio.
It is always good practice to
Tom,
The local SCS modem expert is Lewis Thompson, W5IFQ here at ARL. email him
at the adr I will send, for info on the interfacing of the SCS. He has
successfully interfaced them to the little 5 watt Yaesu radio, I know. I
think it is pretty straightforward to interface the SCS to anything.
Leigh, most of your coupling may be magnetic, if shielding did not reduce
the RFI.
You might want to experiment with steel shim stock or even tinplate from
cans.
The easiest fix is distance: Moving the rig away from magnetic and
electric field sources of transformers as you have found.
GL,
Stua
Aluminum foil has very slight magnetic shielding, but there is commercial mu
metal foil that is very expensive but very good.
Thin sheet metal is cheaper and more readily found. Check it with a magnet
to see if it will work as magnetic shield. If magnet sticks it is steel or
ferrous (shield abil
You can find many suitable cases at places selling to other markets than ham
radio.
One time, I realized a lot of QRP rigs fit the insulated coolers for six
packs. Makes a good way to store your rig in a car full time.
Larger cases with room for air to circulate would work for operational fiel
Well, John is with his unit and deployed even before the hurricane struck.
His priority is the Red Cross satellite phone traffic, and Red Cross radio
band.
-Stuart
K5KVH
Red Cross Austin
The Weller tip goes directly to AC power ground to meet UL and American
safety codes, (National Electrical Code) Otherwise there is a shock hazard
if a shorted element contacts the sleeve.
-Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailm
- Original Message -
From: "Stuart Rohre" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>;
Sent: Tuesday, May 25, 2004 10:54 PM
Subject: Re: [Elecraft] OT: Long loop antennas
> Yes Rhombics are fun. Back in
Jack,
Yes, the beam could be shortened with helical wound elements of wire. This
was a beam shown in the ARRL Handbook way back, not sure if 1957 or when.
You could even make the elements of ham sticks!
You can fed one side with a monopole approach to get impedance matching, see
the Kent Brittai
The use of the conversion from 5 MHz VFO is indeed how the USB vs. LSB
convention got started. With 9 MHz IF you got 4.0 MHz (80M) and 20M, (14
MHz.) 9 -5 in one case, 9+5 in the other, with opposite Sidebands.
The first use of such was probably the Central Electronics or similar tube
transmitt
Yes Bob, I corrected my post. It was 9 MHz VFO to switch SB.
-Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
http://mailman.qth.net/mailman/listinfo/elecraft
You must subscribe to post.
Subscriber Info (Addr. Change, Unsub etc
Eric, the RS resistors are inductive, and probably wire wound and unsuited
for 50 ohm impedance to RF. You would need compensation capacitor networks
for them for each band.
You only measured their DC values as 50 ohms. Impedance is an AC /RF
quantity.
RS used to carry a true QRP dummy load, b
Trev,
Way back in 1960's I wondered the same about Corning tin oxide resistors
like these axials.
I measured many after work with HP Vector Impedance Meters, forerunners to
the MFJ et al.
The results I got showed they were good up to 108 MHz the high end of the
4815 Z meter. I also had run them
Buy a flat screen monitor, and not plasma.
Really, a CRT monitor radiates from cabling and from the screen tube itself.
You might have to slide the ferrite choke along the cables to find optimum
effect from it.
GL,
Stuart
K5KVH
___
Elecraft mailing li
I ALWAYS grip the component with thin needle nose pliers against the body
before using a bending jig or my fingers to move the leads 90 degrees to the
case of component. I have seen diodes fracture if not.
72
Stuart
K5KVH
___
Elecraft mailing list
Post
The parallel jaws of extremely thin needle nose pliers will grip the lead by
the body of a part and resist the bending forces at 90 degrees to the wire
lead that might cause internal stress on diodes or other component
terminations inside a part. The jaws have cross wise serrations that get a
firm
Some rigs will take it fine, as is. Is it the one with amplifier in base?
that type will surely work with all modern rigs and proper adjustment of the
amplifier.
On some rigs, with low Z mike inputs, a high Z to low Z transformer can
match the high impedance crystal element of the D-104 to the m
Lee,
Maybe a latent bad solder joint? How about the speaker mounting screws
being overly tight?
A couple of the obvious things to check.
72, and GL,
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to
Ford trucks are notorious for having need of filters added to the in tank
fuel pump and possibly at the computer. There is a service bulletin, he may
have to go back a few years.
Ask dealer to contact the regional or National RFI people at Ford.
There is a company here who makes filters for Ford
Isn't the tone alternation of WWV between 400 and 600 Hz? It used to be.
-Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://ma
Doug, the feedline length may be a problem on 30m.
Try adding or subtracting 5 or 10 feet to it.
72
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub
Posters should disable their anti spam authentication if they want a direct
answer to their question.
A recent query resulted in my receiving a long complicated request for me to
go to web site to prove may answer was not from a machine. The web site
took too long to come up, so I canceled the re
Doug,
Hams have to remember, even if using coax, with a tuner on the rig, the coax
is part of the antenna system and can radiate if a critical length. This is
obviously why the 30m band is hard to match. You have to make the antenna
plus coax of an electrical length the tuner can match.
GL and 7
You may have better results with a dipole antenna, or at least you will be
able to tell if it is the band.
A very low antenna as you describe, 12 ft., radiates mostly straight up and
is only good within your state except for exceptional propagation
conditions.
Try something from a tree to the pea
John,
It would be perfect for a mobile or to the field shelter rig. you would use
it with low doublets for NVIS propagation, (straight up).
NVIS is a very viable HF technique for around the state communications.
72,
Stuart
K5KVH
___
Elecraft mailing l
Bands such as 80m and 160m have a lot of thunderstorm static in summer, and
are best in that regard , (lower noise) in winter. 40m is more of a
daytime band for shorter ranges, and skip lengthens out at night. If you
are trying to work in state, 80 and 160 m are best for that at night.
Bands ab
If the average Sun Spot cycle can be called 11 years, and if 2002 was the
peak year, (somewhat muddied because of an apparent double peak this time);
then, from a peak to bottom should be 5 1/2 years. The bottom would be in
2007, and then another 5 1/2 years would bring the next peak around 2013.
The great Sunspot cycle peak in 1957 was the greatest ever recorded. For
some of us that were just coming into radio, it is hard to take cycles that
do not reach those dizzy heights.
For a young ham in 1957, sitting in a mobile with AM rig of about 50 watts,
talking to Australia in the middle of
Bob,
You might have another world round table. I did one in about 1991, New
Zealand, Australia, Alaska,
Chile, and Texas. SSB, 100 watts, wire K5KVH varient of the G5RV. (Flat
top was tee made up of 40 feet phase line plus the wire doublet).
73,
Stuart
K5KVH
___
Nicolas, you will never go wrong with the simple dipole. With your
restricted space, you might have to bend a dipole to fit, but that should be
considered as opposed to a less effective antenna.
The 44 foot dipole plus the tuner hits a number of good DX bands. You can
bend it to fit your space.
Doug,
I guarantee that a whole box of moth balls will evict your furry attic
resident. However, it will permeate to the house, unless you can seal the
attic entry from the house with masking tape for a few days.
Be sure to find the entry point and be ready to screen it off as soon as the
furry fr
I agree with Phil, that a ground mounted vertical would pick up more
household noise than a horizontal dipole placed away from the house. See
the Cebik web site; www.cebik.com for antenna ideas that really work for
limited space.
72,
Stuart
K5KVH
___
Indeed, I agree that a horizontal antenna may be less noisy than the ground
mounted vertical.
You can try a simple wire dipole made of hook up wire at little expense to
check local noise situation and its orientation may make a big difference in
noise. The wire should not be parallel and at same
As others have noted two radials is a minimum. They should be used in
balanced numbers, pairs.
You also may benefit to have one radial in each direction you wish to work,
as that increases the signals from that direction when you have only one
radial in that direction. Pairing radials is suppose
Artificial ground tuners are series resonant circuits with a current sensing
metering circuit so that you can tune for maximum current in the series
circuit, an indication of optimum cancellation of the reactive ground lead,
(resonance).
Stuart
K5KVH
__
The nice thing about the Ten Tec kit, is that it can be easily converted to
an "L" network tuner, if you switch the point where the pick up circuit
monitors current, and substitute a coax jack for the connection in one
original hole. That way, it can be converted back to artificial ground
service
In other words, a revival of the "Rag Chewers Club" formerly available from
ARRL!
Very good Larry.
72,
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change,
The Windom is not a cure all antenna, and indeed has a number of potential
problems. Its original version was a one band antenna, and modern uses of
similar antennas are like stuffing a model ship in a bottle--doing something
other than the physics show is the simplest antenna.
As an off center f
Yes,
I think we can do simple kits with 1206 parts with home hand tools and
possibly a hold down fixture home made. In fact, that would be a great
"kit", a set of SMT sized tools: Needle Nose pliers, light spring tweezer,
hold down device that would sit on desk and exert weight on a 1206 compone
SMT:
Actually, you can use your present soldering station if it is heat
controlled, and just get a smaller conical 750 degree tip for the Weller, or
Ungar lines. For home use, this works for 1206 components well enough. The
secret is to not apply heat too long, you are not soldering like you did
Sandy,
What kind of soldering station do you have now?
How about $5 to put you in SMD capable soldering set up? Or maybe $10
outside, the cost of a proper tip if you have a heat controlled station now.
750 tips would do it, with the narrow end suited to 1206 pads.
73,
Stuart
K5KVH
_
For manual SMT parts, 1206 is a workable size: 0.12 in. by 0.06 in.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.
Yes, the Princess line of irons with replaceable tips can be used for SMT.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://ma
Why not get the spinner attachment for the standard Elecraft knob? Easy
addition as it glues on.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub,
Peter,
There are water clean fluxes that might answer your concern. I was thinking
of ones that dissipate with soldering heat, just a dot on land of the
component that was to be the "down side."
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@
Pete, I have tried cyanoacrylate and when it heated it let go.
-Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.n
There is a fix for this well known susceptable Wineguard amplified antenna.
Check out the ARRL web site, or Wineguard web site. Something was in QST I
believe also.
They have to fix or trade in the antenna with Wineguard. It is not possible
to fix at the ham station.
72,
Stuart
K5kVH
Sometimes reheating what "look" like good joints will fix a problem.
Are you sure the enamel got well removed from toroid leads before soldering
those leads?
GL,
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a sub
You can roll off low end by decreasing the coupling capacitor in series with
the mike hot lead, or adding another to the mike alone to effectively do the
same.
You may need to change the gain of the mike preamp to optimize for the Heil
mike.
72,
Stuart
K5KVH
_
When not in sight of the rig, as in the yard, you are probably required to
follow the FCC remote control rules. Review Part 97 before doing any remote
work.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subs
You could always go to a Liquor store and get some Everclear, pure spirits.
However, cleaning of the Elecraft boards is NOT necessary nor desirable.
You never know what the plastics in today's parts will do in the presence of
solvents. Use of the cut off acid brushes will work, but only as long
There are a number of independent probe makers. Goggle, Test Probes Inc.,
(TPI) and Probemasters.
They are carried in the electronic Distributors catalogs. Check out Newark,
Allied, Mouser, DigiKey etc.
Stuart
K5KVH
___
Elecraft mailing list
Post
FCC commissioners and bureau heads today are usually lawyers, not technical
types. The commissioners probably have never been technical types since
they are political appointees.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.
The Pomona web site lists all the major distributors as stocking their
products: Allied, Newark, Arrow, McMaster Carr, Powell, as well as Mouser.
Maybe not all stock every item, but Allied , Newark, and McMaster Carr are
usually widely stocking down here.
73
Stuart
K5KVH
The definition of Marconi antenna is that it is quarter wave.
A half wave antenna is called a Hertz antenna in some older literature.
Stuart
K5KVH
The 80 m dipole feed with ladder line and a tuner can work well even with
multi lobes on the higher bands.
See any edition of the ARRL Antenna book or handbook for typical patterns,
or www.cebik.com antenna web site for patterns. If you take into account
the lobe directions you will have fine
Don't worry about the carbon in the pole. It is bound up in a matrix of
plastic such that it does not make a good conductor. You can check with an
ohm meter two places say a foot apart; what does that read on your pole?
(don't break the outer covering, just hold the probe side against the pole
Bob, you need quarter wave insulated radials in the shack right at the rig
ground post to eliminate the hot rf problem on each high band. Connected
at the ground rod, they do no good, since that is 18 feet ? away from the RF
source, (Rig). Also, how close is your antenna to the rig? Making t
Bob,
The length of conductor from the rig chassis to the eventual ground rod,
including the length of the rod to the physical dirt, all makes a resonant
system. If such a "ground" lead is 1/4 wave or a substantial length at a
given band, you will have a poor RF ground.
As someone said, you nee
Jim and the group,
At every field day, our club W5KA uses 80 M Inverted Double Extended Zepp
element wire doublets.
We have had up to 250 feet of two types of window line, and with the large
Dentron tuner, we have a low loss match, and it works every signal we hear.
That is on multiple bands wh
How low did you have your horizontal loop? We always use a 2 wave or so one
for field day, (80m), but mostly use it on 40m and up to 15m. It is always
only 20 feet high, as that is the limit of reach of our portable ladder.
We get great signal reports, and work all over the country from the Ce
Mike and the group,
I am currently routing heavy duty 300 ohm twin lead from a 5/8 leg 20m
antenna, thru a slot cut into some foam pipe insulation that acts as a panel
in the bottom of a aluminum sash window. The window has aluminum sill, and
frame, and individual panes of glass with aluminum s
I have toyed with adding 160m to an existing "80 to 10m band" vertical by
the simple expedient of placing an 80m trap at the top of the vertical, then
leading off a wire to make an L antenna with enough horizontal length to
load the whole on 160m.
Remember, you get nearly the efficiency of a di
The video on tinning toroid leads, does point out the ease of doing it by
first scraping even a single bare copper spot on the lead, and then starting
the application of iron heat and solder wire there.
I had not seen this before. He used an Xacto knife blade and one swipe to
start the spot.
Wal Mart stores abound in the South, and Orlando should have some well
equipped with fishing poles. They will be cheaper there, (less dear), than
in the dedicated fishing shops.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.n
It is not too simple to measure phase with a additional circuitry. However,
it is simple to move the frequency of the antenna analyzer and see the
Reactance change, IF it is increasing with frequency it is inductive
reactance, (+); if decreasing with frequency increase, it is capacitive
react
Thanks Don, my work around has worked for simple antennas like dipoles,
loops, verticals, etc.
His OCF antenna has an interesting sharp resonance which must be the
principle one, but also a non harmonic resonance which is interesting. I
had not looked at a horizontal OCF (off center feed) one
I was referring to a narrowband case of examining a simple antenna to see if
it is long or short. One with well defined sharp peaks and valleys of
impedance, and one principal resonance which you can estimate from the
dipole physical length. Seems to work using my Autek or MFJ 269. I was not
I did not mention that obviously, one has to watch both the impedance
variation and the reactance term to use my approximation to finding the sign
of the reactance. Larry's antenna is a good exception to the performance of
simpler antennas.
Most ham antennas have well defined harmonic related
Both the half wave and 5/8 wave antennas are complete resonant structures
without the need for radials. See L. B. Cebik's web site, www.cebik.com for
his discussion modeling half wave verticals, and little was gained by
modeling radials under them.
The reflections you are concerned about are i
This won't really buy you any advantages, and might cut down chances of
resale, since most hams don't want a modified from stock radio in more
recent models.
N connectors are most suited for outdoors or UHF applications. Or powers
much higher than Elecraft radios!
-Stuart
K5KVH
The original Panadaptors, as I recall, in the WW2 era, worked in the
receiver IF, as RF spectrum analysis was but a dream when it came to
affordable circuitry.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a
Additional comments on using an A/D at the front end of a radio.
High Speed A/Ds that can handle the wide dynamic range of radio signals are
still an art form.
Any A/D suffers from the need to have filtering in front of it to avoid a
malady known as aliasing. In A/D theory, without band limi
Augie,
You are correct, Ham Radio went to CQ Pubs., then to ARRL, as Communications
Quarterly was incorporated into QEX.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscri
Brett,
There ARE kilowatt baluns, but the balun probably will not help a G5RV due
to the fact it is resonant on 20 as a gain antenna, and somewhat of a
mismatch on any other band. In fact, you would be better off running open
wire line all the way to a Tee tuner, then using a ferrite bead 1:1 b
Frank,
There are steel blades still sold at Home Depot for painting clean up of
windows. Single edge razor blades.
Now if the school official "crazies" won't stomach those, you can simple
substitute some plated metal or even a rusty slip of steel. I wonder if a
scrap of blue banding metal tap
I wonder if the blue blades are the same steel coating procedure as bluing a
gun barrel? If so, you can get solution for treating steel at most gun
shops that cater to those restoring firearms.
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecr
The rules are pretty clear, what ever stations you run, free ones included,
the highest power run determines the class of operation. If in battery
class all stations have to be on battery at 5 watts!! No exceptions.
I have always thought that the arbitrary 5 watts for both CW and phone modes
w
You can determine the sign of the reactance by simply tuning higher in
frequency. IF the reactance increases it is inductive, if it DECREASES, it
is capacitive reactance. Remember the basic formula for inductive is Xl =
2Pi fL, while the inverse formula is for capacitive reactance, thus it
de
For 20 meters and up, the Minuteman antenna I have has been very good in
performance and ease of use.
It does require some guying in a wind, and I modified the upper section to
have another PVC pipe section to provide more Velcro attachments to
stabilize the collapsible whip.
Stuart
K5KVH
A lot of these antenna ideas have been modeled by L. B. Cebik, W4RNL at his
excellent antenna web site: www.cebik.com
Stuart
K5KVH
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber I
Whether you will get good results with your loop under the shingles depends
on the amount of metal flashing on the edges of your roof. Also, on the
amount of metal enclosed by it in your attic. we tried one on a Red Cross
building that had perimeter flashing and even on standoff insulators, th
The device is stated to have toroid cores on each side of the line conductor
so as to provide a DC short to the antenna side of the box. On the
transmit side, it may be AC coupled, which is fine when the right size cap
is used for RF. The cores with their windings act as RF chokes while
allo
L. B. Cebik reports favorably on vertical dipoles at Cebik.com. When
elevated sufficiently; since they are a complete antenna, not requiring a
radial set; they radiate quite well at DX angles. See www.cebik.com
-Stuart
K5KVH
___
Elecraft mailing l
The standard "circuit" Ten Tec uses to test their noise blankers is a relay
wired to open its own coil circuit and then remake. The arcing at the
contacts makes a good close by test source for this.
73,
Stuart
K5KVH
___
Elecraft mailing list
Post
To adequately "ground" for electrostatic charges does not require a
connection to physical earth at all.
In fact whether to use a strap at all depends on your local temperature and
humidity at the work station. Dry cold winter weather is more risk than a
wet spring unless you have a cold air co
Ron makes a good point about an antenna backed by an upslope, such that the
antenna is below the highest objects, be it hill or house.
You can possibly get more interesting contacts by arranging a rotating guy
ring to which to attach the high point of the antenna. Then, get some
rebar to act
Verticals are probably preferred for tight locations, and in any case have a
nice low angle of radiation even given ground mounting, or low elevated
mounting. Of the two, if you can get the antenna up six or more feet, so
much the better. Then you could use gull wing elevated radials to improv
Ball bearing and similar fans have a longer life with quiet than sleeve
bearing fans. You might check out the offerings from Mouser in small fans.
-Stuart
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post
My measurements on ham grade coax switches show 40 dB or less isolation
between positions.
IN FACT, 60 dB is high even for a commercial grade switch. The simple types
from MFJ that are wires to a multiposition wafer switch do not shield quite
long wire runs from the adjacent connectors. Those
The parent co. is now of the Loctite products group, who make thread locking
compounds to paint on nuts and bolts.
(Permatex whom I thought of makes the gasket compound, or 'goop'. Both
products, Loctite and the gasket stuff are a kind of 'goop', thus the
confusion.
Multicore Solders, formerl
Solder is a very subjective thing.
The thing to do with any solder unfamiliar to you is use it on some cables,
components, connectors and evaluate the quality of joints it makes with your
soldering tools, skill, etc. You can see if it takes more or less heat than
old solder you are familiar wi
A lot of times you can make RS 232 work even without the handshake lines
like CTS, DTR, RTS.
You loop back pin 4 to 5 of the 25 pin D connector, and you hook 6, 8, and
20 together. 2, and 3 are your transmit and receive, and pin 7 is the
common.
Pin 1 is chassis ground, but do not share it wi
Super Glue should be fine. Some epoxies however, have fillers in them and
might NOT be passive to the RF specs of the core.
I saw this happen while working in the EMC field. We were testing a
transformer for a customer that had to attenuate RF passage thru its core
and windings. It was a thr
1 - 100 of 312 matches
Mail list logo
