Material

US Onlinemetals.com titanium, phosphoric copper
phosphoric bronze, beryllium copper, Garolite
US McMaster-Carr hardware, screws, etc.
US K&S Precision Metals full line metal specialist
UK Albion Alloys brass, copper, aluminum, pakfong, alpaca
Imperial and metric screws, nuts, bolts, spring washers, rivets

Don't buy screws of unknown origin.
Last year I bought Philips screws M3 for satellite stuff, and all the threads were screwed up. Can't place there nuts.
Canada is mostly metric, US is in imperial units.
I like both measurement systems, except the megalithic yard (83cm) pushed by Germany.
There are 20 types of lock washers available in the US, 3 types of lock washers in UK, 2 types of lock washers in EU.

Frankly, any type of Brass originating from China has quality problem. Suddenly it turns into brittle, tiny dust.
It may be wrong composition of the alloy, or overheated material, or both.

Specialized Aluminum alloys from China is a problem associated with material properties and processing.

The zinc alloys completely dispose itself in hot humid environment. EU companies love to use it laundry machines..
(Don't buy, let the wisdom go bankrupt).

Software

classified

Antennas

Markets flooded with wire antennas made in China (weird attractive trademarks) are not of our interest.
Mapleleaf.com ON CA aluminum, fiberglass, pipes, antenna.
Different sizes of imperial Aluminum pipes fit inside each other. You can extend the pipe with another insert pipe inside. This works only in imperial system. Talking heads with metric units - the pipes do not fit inside larger one.
It is your duty to make your own antennas.
- Study and experiment.

US, CA, AC6V.com antenna collection
EU, SP, SP7GXP.pl antennas, verticals

Commercial antennas with eye-catching names are usually full of hidden problems.
Example: "Larsen" 2m/70cm mobile magnetic mount vertical antenna (China). The bottom brass parts fall apart. It turns into brittle brass dust. This was seen multiple times and named Hong-Kong and Chinese brass problem. Overheated? It has nothing common with normal brass.
Just purchasing won't change much. You end up with different junk. Do it yourself, of ask somebody to make custom model.

Hardware

US toroids.info ferrites, toroids, cores. International shipping is stopped     (because of Germany and EU vermin, customs taxes & fees).
US kitsandparts.com NPO caps, kits, transistors. International shipping is stopped   (because of Germany and EU vermin).
US kitsandparts groups announcements, restocking, sales.
US kc9on litz wire, toroids, caps, crystals, trimmers. International shipping is stopped  (because of German and EU vermin).
SV sv1afn.com ferrites, transistors, 25 ohm coaxial cable, kits.
JA Toko.com Japan coil forms. Great, different size coils. They don't ship to Canada.
    (-because of history. British Columbia Japs and Chinese were kept in sort of "BC isolation camps" during WWII).
US ARRL.org PDF. Verified sharp excellent HF bandpass filters with toriods 0.2-0.48 dB loss. From old school designers.
BA china AllPCB.com good pcb manufacturing in China for prototyping. Thickness selection with regular US dimensions for copper, prepreg, vias, FR-4, duroid, thickness. They ask to be sure. (NO 18um European copper BS and $400 per board). NO attitude 1.52mm thickness fits all.

US Sulprus Sales of Nebraska silver Mica caps 500V, 1000V, tubes, sockets, terminals, door knob capacitors, whatever.. normal friendly people

Futurelec.com

sv1afn.com

Federal Antenna Law  (Antennas for amateur communications)

Federal amateur anntenna law PRB-1 (FCC 85-506 36149) Released: September 19, 1985.

    1. On July 16, 1984, the American Radio Relay League, Inc (ARRL) filed a Request for Issuance of a Declaratory Ruling asking us to delineate the limitations of local zoning and other local and state regulatory authority over Federally-licensed radio facilities. Specifically, the ARRL wanted an explicit statement that would preempt all local ordinances which provably preclude or significantly inhibit effective reliable amateur radio communications. The ARRL acknowledges that local authorities can regulate amateur installations to insure the safety and health of persons in the community, but believes that those regulations cannot be so restrictive that they preclude effective amateur communications.
    2. Interested parties were advised that they could file comments in the matter.¹ With extension, comments were due on or before December 26, 1984, 2 with reply comments due on or before January 25, 1985. 3 Over sixteen hundred comments were filed.
    3. Conflicts between amateur operators regarding radio antennas and local authorities regarding restrictive ordinances are common. The amateur operator is governed by the regulations contained in Part 97 of our rules. Those rules do not limit the height of an amateur antenna but they require, for aviation safety reasons, that certain FAA notification and FCC approval procedures must be followed for antennas which exceed 200 feet in height above ground level or antennas which are to be erected near airports. Thus, under FCC rules some antenna support structures require obstruction marking and lighting. On the other hand, local municipalities or governing bodies frequently enact regulations limiting antennas and their support structures in height and location, e.g. to side or rear yards, for health, safety or aesthetic considerations. These limiting regulations can result in conflict because the effectiveness of the communications that emanate from an amateur radio station are directly dependent upon the location and the height of the antenna. Amateur operators maintain that they are precluded from operating in certain bands allocated for their use if the height of their antennas is limited by a local ordinance.
    4. Examples of restrictive local ordinances were submitted by several amateur operators in this proceeding. Stanley J. Cichy, San Diego, California, noted that in San Diego amateur radio antennas come under a structures ruling which limits building heights to 30 feet. Thus, antennas there are also limited to 30 feet.
Alexander Vrenios, Mundelein, Illinois, wrote that an ordinance of the Village of Mundelein provides that an antenna must be a distance from the property line that is equal to one and one-half times its height. In his case, he is limited to an antenna tower for his amateur station just over 53 feet in height.
    5. John C. Chapman, an amateur living in Bloomington, Minnesota, commented that he was not able to obtain a building permit to install an amateur radio antenna exceeding 35 feet in height because the Bloomington city ordinance restricted "structures" heights to 35 feet.

Federal antenna law PRB-1 is available in PDF. (download)

"It seems to me, worldwide activities of incompetent Bureacrats and Self-Elected people (Vermin) to suppress any use of antennas, are becoming more and more pronounced worldwide pain". Actively fight these people.
Government is here to protect your rights. Government is not here, to tell you what to do, and what to think. IF you see this, you have communist government silently installing socialism bordello.



        Anti-antenna maggots and bureaucrats.

By law you have right to own, install, and use antenna.

Limited space Antennas

5.0GHz   band - antennas covering all three region-related sub bands (my own design).
2.4GHz   band - collinear is quite good (my own design). Quads.
2m - multiple F9FT yagi beams. The 50 ohm or 75 ohm type.
10m - resonable size, gain, easy mount. W8JK beam.
15m - vertical, 5/4= 1.25 lambda, or 5/8 lambda, lambda/2, Beam.
17m - in development. (Nice band without FT8 cockroaches).
20m - Beam. Dipole. Sloper under wooden roof works well. Grapefruit vertical.
60m - not much space for antennas. Nice band with nice propagation.

160m - Limited garden space. Town is full of QRM. Country shack is the answer.
137kHz - problem with radiation efficiency and miles of wire. Try abandoned railroad telegraph lines.

Try PowerSmith program for antenna matching.

Thoughts

Most valuable inputs with extraordinary technical abilities to describe the problem and discuss details.
Inseparable part is mutual cooperation. Sharing the good and bad experience.

VK5BR
VK5DIP
W3NQN
N1FD.org Nashua MS, USA
W8JK John Kraus, Antennas ISBN
Eskymo Welzl - "30 years in Golden Arctic" book. Yukon, Alaska, Nome, Bering sea, arctic Siberia. Known Authentic person.
(Sometimes a pound of meat has more value than pound of pure platinum).