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Thanks for the reassurance, Simon!

One niggling problem less to fret over :-)

Michael 2E0IHW

On 19/08/2024 17:46, rfsam wrote:

Hi Michael,
Here is a pic of my CCW Experimenters amp. I'd say this vent hole is
about the size of the center pin hole in BNC Female connector. Very
close in diameter.

...

Simon
KM6MUL
On Mon, Aug 19, 2024 at 2:21?AM Michael.2E0IHW via groups.io
<blumu@...> wrote:

Simon, is your hole similar?

Hi Guy,
Sorry for that. Didn't created a shared link properly. I hope this one
will work:

Regards,
Simon
KM6MUL

On Mon, Aug 19, 2024 at 7:26?AM Guy Mengel N1GMM via groups.io
<guy@...> wrote:

Hi Simon,
Thank you for all the links and info. Good to know info! So thankful you put all the effort for me in the links too.

I would love to see your picture linked at the bottom. But the link is broken.

--
73/
Guy, N1GMM
Web Presence:
Withywindle ( )
tom-bombadillo ( )

Hi Michael,
Here is a pic of my CCW Experimenters amp. I'd say this vent hole is
about the size of the center pin hole in BNC Female connector. Very
close in diameter.

Regards,
Simon
KM6MUL

On Mon, Aug 19, 2024 at 2:21?AM Michael.2E0IHW via groups.io
<blumu@...> wrote:

Thanks, Tom!

I wondered whether too small a hole would allow
a droplet to block the hole and defeat its purpose :-)

Simon, is your hole similar?

73
Michael 2E0IHW

On 18/08/2024 23:58, Tom - VE3PSZ wrote:

I have built about 20 amplifiers for outdoor use. All of them in IP65
type boxes. I always drill a 1/16" (1.5mm) hole in the side facing
downward. Some of my units have been outside for 3 years now without a
trace of water inside. Tom

Hi Simon,
Thank you for all the links and info. Good to know info! So thankful you put all the effort for me in the links too.

I would love to see your picture linked at the bottom. But the link is broken.

--
73/
Guy, N1GMM
Web Presence:
Withywindle ( )
tom-bombadillo ( )

On 8/19/24 11:21 AM, Michael.2E0IHW via groups.io wrote:

I wondered whether too small a hole would allow
a droplet to block the hole and defeat its purpose :-)

Folks, you overcomplicate the thing. As Tom advised, drill a tiny hole at the bottom of the plastic case/tube/whatever, install a small bag of desiccant inside and that is all to it. For the size of the drill bit: choose something smaller than the smallest insect you saw. It was 0.6-0.8mm for me, sure enough for the enclosure to breathe and prevents worms to crawl in. This worked for me perfectly.

Simon, is your hole similar?

Giggling...



73... Sanyi, HA3PG

Thanks, Tom!

I wondered whether too small a hole would allow
a droplet to block the hole and defeat its purpose :-)

Simon, is your hole similar?

73
Michael 2E0IHW

Maybe it will get cheaper...don't bet on it.

Michael,
Maybe a mm or less. I guess he just uses the smallest drill bit
available. I will try to measure it :)
Regards,
Simon

On Sun, Aug 18, 2024 at 2:48?PM Michael.2E0IHW via groups.io
<blumu@...> wrote:

Simon, very useful info.

What size is your "tiny hole" ?

Michael 2E0IHW - near the Atlantic...

...box venting:
/g/CrossCountryWireless/message/9179

I've got CCW Experimenter's amp in February this year and it only has a
tiny hole at the bottom of the box.

Simon, very useful info.

What size is your "tiny hole" ?

Michael 2E0IHW - near the Atlantic...

Hi Guy,
Of that would be of any help here is a list of parts I used:

PVC IP67 box: (different sizes available)

Cable glands: (PG25 is a
bit wide for CAT cable that goes down to receiver, so either some
silicon self-adhesing tape can be used or PG19 just for the cable
entry)

Clamps that I used on the back of the box:

(U-Bolts were replaced with straight 5/16 bolts)

Straight bolts:

(not really sure if they are high quality SS, but I didn't care much
for this application)

I also used 5/16" wide fender washers from the inside to hold the
bolt's heads. Plus a good amount of heat glue (good silicone should
probably be better).

Mast:
(not as strong as other expensive ones, but we will see how it will
hold up and I only used 3 lower sections. Sections glued together with
epoxy to prevent collapsing down.)

CAT8 SFTP "heavy duty" outdoor rated 25ft patch cable used to connect
antenna to LZ1AQ control board:
.
I put quite a bit of FT240 toroid's on it to fight the noise and
interference at my Urban location (2 at antenna, 3 at control board
and 1 in the middle of the cable).

Tripods I'm using at the moment:


7/8" copper pipe that I used with another loop and decided not to use
with this one due to it's weight:


5/8" aluminum tubing (not from these sellers but very similar item):




!94040!US!-1&itmprp=enc%3AAQAJAAAA8HoV3kP08IDx%2BKZ9MfhVJKnbBHv4DsF7CvTgz%2Fz2seoNNj1Z0J7XLn4m6xDiZ%2FZvf95r9lIDbMA14Yc5PbKP1vRNd47P6lfVeox4SSjm8G2Rspck0p1YQwOasqBofv00QB%2BWrOCyLvHBGinLqBZz2ZTTi4e4y4KaMduJmBrs8Y79uBvdc9YZ7F6Z69vPOILYYPQYkI8jSc8EoFvegz5NwI0MHC1KnloljYZ5XT%2BjDdBMVwaF7jSQNSihbzZrpkz9JFpKmgck3tOoUWNuvTktZ%2BET%2F6WLzvXAVThswPcc36l6sBKmiHJpBEkwyfEiyMyeZQ%3D%3D%7Ctkp%3ABFBM5K7q86xk

Both 7/8" OD copper thin wall tubing and 5/8" OD aluminum tubing are
thin walled and can be formed by hand - no roller is needed, just time
to make it more or less round shape.

But as I mentioned before if I need to redo it I'd probably use 1" OD
PEC-AL-PEC instead.

Pic of the antenna from the back:


Best Regards,
Simon
KM6MUL

On Fri, Aug 16, 2024 at 4:25?AM Guy Mengel N1GMM via groups.io
<guy@...> wrote:

Hi WN4ISX and Simon,
Thanks for the notes. Both of you.
First WN4ISX (Terry?) Thanks for the reminder to keep notes. Being an old submariner and Sonar tech, ELF,VLF,HF and NDB's and CW interest me. Loops too as putting up high wires is next to impossible.. Everything from ground or my wife watching me stumble around on the roof on my butt (HIHI) and thats after climbing the ladder!. Canes and roofs are not compatible. Sons are non existent here in the sticks. About clubs.. long story here.. went a couple of times, mostly (if not all handy talkie stuff). I even brought some homebrew stuff (recievers,qrp HF and more) they looked.. said wow and that was it.. I even got an IC-910H with all the bells and whistles to see if I could interest them. All I got was being approached after 3 meetings to run as president of the club.. nah.. my health not acceptable.. but my desire was there. Many said they would come visit to see my setups.. but never came.. a non starter.

EMI.. well the 20,40,80 bands are noisy.. I have a lower 240ft doublet, home brew up about 60ft.. that took me 2 weeks to hang.. and a home brew 80m efhw ant with 49:1 transformer again homebrew..

Its loops and technical things for me now. I cannot find anyone interested in this here in the rural back woods..

Simon thanks for the info on the PEC-AL-PEC 1 and pictures of your implementation. This is almost exactly what I wish to do.. except, if possible, off the ground. Using and anchored tripod or pipe in the ground with cement.

Good Morning to all
Guy N1GMM