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Re: Ecoflex 15?
Neil Smith G4DBN
I have a 25 m run of Ecoflex 15 plus that has never been moved and it is as good now as when it was installed. However, the runs that I had on the pump-up, which were coiled carefully into a 1m diameter heap and raised/lowered once a day on average, started to get suck-outs and lossiness at 23cm and 13cm after six months. Might have happened sooner, but I noticed things were getting slightly worse over time. Same with some patch leads that Tony brought round. Some that were 2m long had 3dB loss at 13cm and 1.5dB at 23cm, and the loss changed as you moved the cables. After slicing off the insulation, we found that the copper foil was split into sections a couple of inches long, with only the scanty outer braid carrying the current between the sections. It is a bit of a swine to terminate reliably as well. Flexy heliax is hugely more practical.
Neil G4DBN
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Re: Ecoflex 15?
Dave - G4RQI
Hello Ben,
LMR600 is nice for a straight run BUT not very flexible... I had 10m of LMR600 until the dog took a dislike to it and now I have 8m 😊
David – G4RQI Sent from Mail for Windows 10
From: militaryoperator via groups.io
Sent: 17 February 2021 20:02 To: UKMicrowaves@groups.io Subject: Re: [UKMicrowaves] Ecoflex 15?
Subject: Re: [UKMicrowaves] Ecoflex 15? DX shop and Nevada both advertise it
Thanks Steve. Looking at specs just it seems LMR600 is better than the LMR400 and Eco15, just by a pip.
ben.
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Re: Ecoflex 15?
militaryoperator
The ECO-15 I have seen, (to a fixed antenna, no rotator) was like concrete filled hose pipe to handle.
I am pleasantly happy with Hyperflex 10 as a good all round compromise around rotators. Not used hyperflex 13.
Colin de G8LBS.
Thanks Colin, and others for tips.
Anyway, it will have to wait a bit, just received WW2 Japanese spy Set so my attention diverted for a while, hi.
cheers, Ben G4BXD
--------------------------------------
Curator, Owner and Display coordinator
Military Wireless Museum
Kidderminster, UK.
This message was meant for the recipient
Any likeness to persons living or dead is odd
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Re: Ecoflex 15?
Colin Ranson
The ECO-15 I have seen, (to a fixed antenna, no rotator) was like concrete filled hose pipe to handle. I am pleasantly happy with Hyperflex 10 as a good all round compromise around rotators. Not used hyperflex 13.
Colin de G8LBS.
Sent from Mail for Windows 10
From: militaryoperator via groups.io
Sent: 17 February 2021 22:16 To: UKMicrowaves@groups.io Subject: Re: [UKMicrowaves] Ecoflex 15?
I have plenty in my scrap bin after it went high loss from before I found out you should never bend it more than once.... . Neil G4DBN
Ah, you have me worried now Neil. I use a telescopic push-up mast with either the 23, 13, 9 or 3Cm antenna on, occasionally more than one but the 10Ghz is 2Mtr down so any old bit of string is ok.
I have a couple of lengths, about 10ft, for the 23, 13 or 9 feeds so there is some flexing needed though of course, the cable hangs vertically (tied to the mast as I erect it) with just the one bend at the bottom to go into the sets.
Maybe the flexibility of the LMR400 is handy. The loss per 10ft )1500Mhz) would seem to be 0.51db for LMR400, 0.33db for LMR600 and 0.41db for eco15.
LMR600 might be a better choice.
Ben.
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Re: Ecoflex 15?
Why not non solder? Crimp and or non solder have been the industry standard for years . Ldf 4 50 for example have been non solder for at least 20 years. Correctly fitted they are perfectly fine. Reg G8vHI Sent from my Galaxy
-------- Original message -------- From: "Pete - GM4BYF via groups.io" <gm4byf@...> Date: 17/02/2021 21:40 (GMT+00:00) To: UKMicrowaves@groups.io Subject: Re: [UKMicrowaves] Ecoflex 15? If Using Eco 15 The plugs must be the solder on type. I have used
Times Microwave in preference. 73 Pete GM4BYF On 17/02/21 21:08, Neil Smith G4DBN
wrote:
-- vry 73 Pete GM4BYF
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Re: Ecoflex 15?
militaryoperator
I have plenty in my scrap bin after it went high loss from before
I found out you should never bend it more than once....
.
Neil G4DBN
Ah, you have me worried now Neil. I use a telescopic push-up mast with either the 23, 13, 9 or 3Cm antenna on, occasionally more than one but the 10Ghz is 2Mtr down so any old bit of string is ok.
I have a couple of lengths, about 10ft, for the 23, 13 or 9 feeds so there is some flexing needed though of course, the cable hangs vertically (tied to the mast as I erect it) with just the one bend at the bottom to go into the sets.
Maybe the flexibility of the LMR400 is handy. The loss per 10ft )1500Mhz) would seem to be 0.51db for LMR400, 0.33db for LMR600 and 0.41db for eco15.
LMR600 might be a better choice.
Ben.
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Re: A proper RAE again
Geoff Newstead
Hello all FWIW I think a single exam to full license is generally a good plan and will encourage those with a technical background to enter the hobby. However, until we are again asked to pay an annual renewal fee to finance license enforcement, I see little point in anyone progressing above foundation level. I wonder when Ofcom last prosecuted anyone for license infringements? With the influx of affordable Chinese equipment requiring little to no experience or skill to set up and operate, there is nothing to stop a foundation licensee with a paypal account from running a kilowatt across the bands.
As far as the qualification/degree argument is concerned: I have worked most of my life as a professional RF design engineer and without a doubt the best engineers all had good degrees. However, some of the worst engineers I ever worked with also had good degrees!
Discuss Geoff G8EKG
Sent from Mail for Windows 10
From: militaryoperator via groups.io
Sent: 17 February 2021 19:28 To: UKMicrowaves@groups.io Subject: Re: [UKMicrowaves] A proper RAE again
Good evening I notice folks with technical interest generally stay distance. Competence should be by interview not exam. You can teach someone to get a good degree but being clever is very different ... 73 Matthew
Ah, that's where I went wrong. I guess I'll need to flush all those parchments on the downstairs loo walls down the loo. Pity, the MIT ones are quite pretty.
Ben
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Re: Ecoflex 15?
Pete - GM4BYF
If Using Eco 15 The plugs must be the solder on type. I have used
Times Microwave in preference. 73 Pete GM4BYF On 17/02/21 21:08, Neil Smith G4DBN
wrote:
--
vry 73 Pete GM4BYF
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Re: Ecoflex 15?
Neil Smith G4DBN
I have plenty in my scrap bin after it went high loss from before I found out you should never bend it more than once.... DX Shop is always a good source of pre-terminated cables, done with a proper machine too. Neil G4DBN
On 17/02/2021 19:51, militaryoperator
via groups.io wrote:
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Re: Ecoflex 15?
Tim Hague M0AFJ <m0afj@...>
Try the DX Shop
toggle quoted messageShow quoted text
Best Regards Tim Hague M0AFJ
On 17 Feb 2021, at 19:51, militaryoperator via groups.io <Military1944@...> wrote:
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Re: Ecoflex 15?
militaryoperator
Subject: Re: [UKMicrowaves] Ecoflex 15?
DX shop and Nevada both advertise it
-- Steve G4HTZ Thanks Steve. Looking at specs just it seems LMR600 is better than the LMR400 and Eco15, just by a pip.
ben.
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Re: Ecoflex 15?
DX shop and Nevada both advertise it
-- Steve G4HTZ JO01JN60 Great Wakering, Essex 24ghz 1.8w 80cm dish also known to be active occasionally on 70cms DATV
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Ecoflex 15?
militaryoperator
Where's the best place to get a short length of Eco15, say 10ft, 3 to 4Mtrs? I want to replace the LMR400 feeder I'm using now. ebay has a German supplier, any in UK? Ben.
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Re: A proper RAE again
militaryoperator
Good evening
I notice folks with technical interest generally stay distance.
Competence should be by interview not exam. You can teach someone to get a good degree but being clever is
very different ...
73
Matthew
Ah, that's where I went wrong. I guess I'll need to flush all those parchments on the downstairs loo walls down the loo.
Pity, the MIT ones are quite pretty.
Ben
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Re: A proper RAE again
Murray Niman
Forgive the pun but to some degree its academic... For most microwave bands... You only have to pass Foundation to gain immediate access to 10GHz (and intermediate for the rest) - that adds up to >2-3000 new folk per year But where are the 'attractors' to get those newcomers onto bands >1GHz...? 73 Murray PS And remember in licence-exempt hack mode many would already be there with Wi-Fi, mesh, video etc, so its not all about DX...
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Re: A proper RAE again
John E. Beech
I don't see why we can't have one exam, with progressively"harder" questions. Say 100 Q's. If you get 20 + to 39
toggle quoted messageShow quoted text
right = Foundation; 40+ to 74 = Intermediate & 75 + to 100 = Full licence. Those who just miss out on the next level might be encouraged to take it again. de John G8SEQ
-------Original Message-------
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Re: A proper RAE again
matthew twyman <matthew222twyman@...>
Good evening
I notice folks with technical interest generally stay distance. Competence should be by interview not exam. You can teach someone to get a good degree but being clever is very different ... 73 Matthew
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Re: High VSWR on 432 MHz
Also, further to Gordon's reply, if you have access to one, I find the nanoVNA V2 to be pretty good at sussing out coax problems and its time domain/delay function is very useful for this.
Julian Grammer. G1EKW
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Re: A proper RAE again
g4zod@btinternet.com
My son being an engineer would have sailed through the RAE. However he was not prepared to mess around with three separate exams.( He was using two way communications in St John Ambulance and was already "on air". ) If there had been a one part exam he would have taken it if I had pushed him. Likewise older friends of mine who have a good technical knowledge are put off by the need for three exams. Hopefully there will be a rethink of the current exam structure. Julian G4ZOD. Sent from my Galaxy
-------- Original message -------- From: Andy G4JNT <andy.g4jnt@...> Date: 17/02/2021 13:00 (GMT+00:00) To: "UK Microwaves groups.io" <UKMicrowaves@groups.io> Subject: Re: [UKMicrowaves] A proper RAE again I skim-read the syllabus. Not vastly different to a full one with the Noddy elements of the other two included for TOC. Andy On Wed, 17 Feb 2021 at 12:55, Murray Niman <g6jyb@...> wrote: Anyone who has naively raced and filled in the survey without carefully reading the 50 page syllabus should go back to school....
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Re: A proper RAE again
Yes I get that Andy ....guess if I’ve managed to bodge something together I would actually like to make some contacts on it ...everyone has different goals I guess
-- Steve G4HTZ JO01JN60 Great Wakering, Essex 24ghz 1.8w 80cm dish also known to be active occasionally on 70cms DATV
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