I have home made antennas for 23cm and 13cm ATV. These are made mainly of
copper, Copper clad fibreglas PCB material and 3mm diameter silver plated
wire with silver plated N-Type connectors an solid copper coax. I want to
protect them from corrosion etc. Is there a paint, varnish, laquer etc.
(ideally an aerosol type) that I can use which will not introduce losses?
If someone can give me guidance as to what base type - for example acrylic -
I should use it would be most helpful. I am always wary of the sprays
supplied for spraying vehicles but these seem to be the most commonly
available.
Thank you
Dick G4BBH

Is it a yagi? What size are they?
Joe

"ferrymanr" wrote in message
...
I have home made antennas for 23cm and 13cm ATV. These are made mainly of
copper, Copper clad fibreglas PCB material and 3mm diameter silver plated
wire with silver plated N-Type connectors an solid copper coax. I want to
protect them from corrosion etc. Is there a paint, varnish, laquer etc.
(ideally an aerosol type) that I can use which will not introduce losses?
If someone can give me guidance as to what base type - for example
acrylic -
I should use it would be most helpful. I am always wary of the sprays
supplied for spraying vehicles but these seem to be the most commonly
available.
Thank you
Dick G4BBH

These are 'bow tie' antennas. A double quad fed as the corners looking a
bit like a figure of 8 and space above a copper reflector. Gives me over
9dBi gain and excellent bandwidth. I use them on their own or as the feed
to a simple large mesh reflector system, a section of a parabolic dish in
fact.. The 23 cm version has quads of 56mm sides. The reflector is 17cm x
23cm of single side copper clad fibreglass. 13 cm version is directly
scaled down in size. See http://www.w6pql.com/23cm_double_quad.htm but mine
does not have mesh reflector but the copper clad board instead rather like
http://www.vhfman.freeuk.com/radio/23cmantennas.html.
Dick

"Merlin-7 KI4ILB" wrote in message
m...
Is it a yagi? What size are they?
Joe

"ferrymanr" wrote in message
...
I have home made antennas for 23cm and 13cm ATV. These are made mainly
of
copper, Copper clad fibreglas PCB material and 3mm diameter silver plated
wire with silver plated N-Type connectors an solid copper coax. I want
to
protect them from corrosion etc. Is there a paint, varnish, laquer etc.
(ideally an aerosol type) that I can use which will not introduce losses?
If someone can give me guidance as to what base type - for example
acrylic -
I should use it would be most helpful. I am always wary of the sprays
supplied for spraying vehicles but these seem to be the most commonly
available.
Thank you
Dick G4BBH

It seems to me that you could put the whole thing in a tube. If I understand
you correctly.

Joe


"ferrymanr" wrote in message
...
These are 'bow tie' antennas. A double quad fed as the corners looking a
bit like a figure of 8 and space above a copper reflector. Gives me over
9dBi gain and excellent bandwidth. I use them on their own or as the feed
to a simple large mesh reflector system, a section of a parabolic dish in
fact.. The 23 cm version has quads of 56mm sides. The reflector is 17cm
x
23cm of single side copper clad fibreglass. 13 cm version is directly
scaled down in size. See http://www.w6pql.com/23cm_double_quad.htm but
mine
does not have mesh reflector but the copper clad board instead rather like
http://www.vhfman.freeuk.com/radio/23cmantennas.html.
Dick

"Merlin-7 KI4ILB" wrote in message
m...
Is it a yagi? What size are they?
Joe

"ferrymanr" wrote in message
...
I have home made antennas for 23cm and 13cm ATV. These are made mainly
of
copper, Copper clad fibreglas PCB material and 3mm diameter silver
plated
wire with silver plated N-Type connectors an solid copper coax. I want
to
protect them from corrosion etc. Is there a paint, varnish, laquer
etc.
(ideally an aerosol type) that I can use which will not introduce
losses?
If someone can give me guidance as to what base type - for example
acrylic -
I should use it would be most helpful. I am always wary of the sprays
supplied for spraying vehicles but these seem to be the most commonly
available.
Thank you
Dick G4BBH

"ferrymanr" wrote in message
...
I have home made antennas for 23cm and 13cm ATV. These are made mainly of
copper, Copper clad fibreglas PCB material and 3mm diameter silver plated
wire with silver plated N-Type connectors an solid copper coax. I want to
protect them from corrosion etc. Is there a paint, varnish, laquer etc.
(ideally an aerosol type) that I can use which will not introduce losses?
If someone can give me guidance as to what base type - for example
acrylic - I should use it would be most helpful. I am always wary of the
sprays supplied for spraying vehicles but these seem to be the most
commonly available.
Thank you
Dick G4BBH

Acrylic enamel auto paint is good for paiting antennas if you must It is
vertually transparent at RF frequencies.I used to install TVRO systems and
know of a couple of horror stories where the dish was painted with latex
house paint.