Date   

Re: Ecoflex 15?

John Fell
 

For > 432MHz I have used Andrew Heliax 1/2" Superflexible ,foam dielectric cable for turning loops and LDF450 A for straight runs .

LDF450 will survive without loss increase upto the point where the outer solid copper shield starts to crack - this material is substantial and NOT any kind of thin film construction.

Amateur uses tend to put cables into areas that are not specified as suitable by the original manufacturers .This includes contesting - I used to operate with G4RFR and our various reels of 450 were stored in 5Ft rolls , used approximately 8 times a year over a 15 year period .Failure was low and by far the largest failure seen was due to miss handling during setup,strip down .In some cases it survived where a bend had caused the outer shield to flatten and was reformed (not good practice ! ).

People get put off using it , I think , because it is stiffer than UR67 and terminations are "expensive" .

This issue can be solved by using a bored out backnot and turning up a small brass impeadance transformer for the inner solid copper (or plated Alum) conductor .
Design in most UK Microwave Amateur books .I have on occasion formed one using a 1/2" pillar drill and a flat hand file .
The assemblies can be fully soldered and if this is taken through the Hex backnut will stop suck outs to well above 10GHz .

It is not good value to spend a long time building low noise kit and deploying shonky cables that act as resistive pads or actual noise sources .

At least the current crop of handheld VNAs can tell you where it's all gone Pete Tong 

This topic will be repeated ad nauseum ......

73
John
G0API 


On Thu, 18 Feb 2021 at 00:01, Robin Szemeti - G1YFG <robin@...> wrote:
I tend to use flexible heliax, FSJ4-50B is my tool of choice.

On Wed, 17 Feb 2021 at 23:04, Neil Smith G4DBN <neil@...> wrote:
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








--
Robin Szemeti - G1YFG


Re: Ecoflex 15?

david656179
 

My experiences and opinions, may or may not not be typical. DYOR.

M&B Hyperflex 10  has more cores in centre, so far rotator loop no problems, M&B Ultraflex 10 seems equally good.  Ultraflex 13 also has big number of centre cores and the more recent batches I have bought meet published specifications,  There were early batches that seemed not to meet spec (or perhaps spec  improved latterly) in all cases though, despite some rough treatment at times on temporary set ups, examination of lengths cut have showed no foil  radial cracking that can happen on Ecoflex and W103.  Of course W103 is not designed for flexing, for permanent installations, it is a very good choice for low loss runs up to and including 23 cm, just never flex or roll up.

Currently 20 m of M&B Ultraflex 13 in use on 23 cm, just one length. including around rotator on scam 12 pump up, much abused with the ups and downs and getting caught on the shrubs/ mast legs.  So far unable to detect spec changes, when checking with the power in/out method.  The Ultraflex connectors are solderless for 13 and some on 10 as well.  The connectors (provided you pay a proper price that is, some poor copies out there), are excellent quality.  The M&B PL259 plugs for Ultraflex 10 are quite excellent, by far the best connector I have used, all of the M&B connectors make excellent and permanent connections to the screen/braid and are highly water resistant.

A short length of RG213, especially the double screened versions, will still be the best "fit and forget" option for a rotator loop, especially if your masts have to be professionally rigged, removes any anxiety about foil cracking failure.

I remember the Camb Hams group repeatedly reporting problems with Ecopflex range on their portable activities, they changed to something else but I forget what it was, with no further problems IIRR.


Re: Low Noise Power Supply

Brian Howie GM4DIJ
 

In message <9b0cfc04-b30d-faba-2395-3d5cba425a26@chris-bartram.co.uk>, Chris Bartram G4DGU <chris@chris-bartram.co.uk> writes
Nothing to do with microwaves, except possibly that it will help me sort-out/rationalise my workroom/shack, and thus help hasten my return to having an operational station.

Does anyone have any (polite!) suggestions regarding a low-noise 12V 20A+ switching PSU?

73

Chris G4DGU
I bought a used HP ProLiant 750W PSU Power Supply from e-bay last year to use /P , rather than lugging a heavy linear supply. They come in at about £12 and easy to mod for 13.8V or you can leave them at 12V.

Http://www.gm0onx.co.uk/ under low cost SMPU

HP ProLiant DL360 G6 750W Power Supply (HSTNS-PD18 version)

They seem quite enough for what I do.

There's plenty of suppliers.

Brian GM4DIJ
--
Brian Howie


Re: Ecoflex 15?

ian hope (2E0IJH)
 

We've trashed many lengths of LMR 400 and clones contesting.
 
From experience, The shirleen RCF clone is horrid, Jacket is very tough and unflexible even on the UF version and doesnt come near spec
 
The HDR 400 versions from WIFI antennas are very good and close to "real LMR 400"
 
The LLA400 versions from CCS are also close to "real LMR 400" and there UF version is very flexible
 
Ian
M5IJH

 
 
Sent: Thursday, February 18, 2021 at 9:09 AM
From: "alwyn.seeds1" <a.seeds@...>
To: "UK Microwaves groups.io" <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Ecoflex 15?
Dear All,
 
I have not yet measured a length of Ecoflex 15 that met its specified loss, even when new. I have measured very bad suck-outs at frequencies above 2GHz on some samples.
 
Ecoflex 10 when new, has generally been close to its specified loss.
 
A difference between cables of this sort (Ecoflex, M&P….) and the Times Microwave LMR Ultraflex series is the low braid coverage. As the foil cracks, radiation losses increase dramatically.
 
My measurements on Times Microwave LMR 400 Ultraflex show losses close to spec. even on samples that have been flexed for several years. 
 
Note that I specify “Times Microwave LMR 400 Ultraflex”; there are many fakes, “LMR 400 type” etc etc which I would not vouch for.
 
Regards,
 
Alwyn G8DOH 
 
 
_____________________________________________________
 
Alwyn Seeds, Director
SynOptika Ltd.,
114 Beaufort Street,
London,
SW3 6BU,
England.


SynOptika Ltd., Registered in England and Wales: No. 04606737
Registered Office: 114 Beaufort Street, London, SW3 6BU, United Kingdom.
_____________________________________________________


Re: Ecoflex 15?

John E. Beech
 

Presumably Ecoflex comes coiled up when you buy it. What happens when you uncoil it? I suspect this is just as bad as
coiling it up.

de John G8SEQ

-------Original Message-------
From: Stephen Tompsett <stephen@tompsett.net>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Ecoflex 15?
Sent: Feb 18 '21 07:41

Remember that the minimum bend radius in the datasheet is usually for
one or a very limited number of bends.

All of the foil and braid construction feeders need to be handled
gently, and it is essential to avoid any twisting of the feeder. Messi
& Paoloni recommend a minimum of 20x cable OD for repeated bends
https://messi.it/ec/pagina.asp?pag=24&l=EN&s=centrale&p=1&mv=166&ml=EN


On 18/02/2021 00:06, Reg Woolley via groups.io wrote:

> As others have stated bend eco flex at your peril. It won't last
> long
>
> De Reg g8vhi
> Ex RAF Aerial Rigger
>
> Sent from my Galaxy
>
> -------- Original message --------
> From: "Pete - GM4BYF via groups.io"
> <gm4byf=blueyonder.co.uk@groups.io>
> Date: 17/02/2021 23:59 (GMT+00:00)
> To: UKMicrowaves@groups.io
> Subject: Re: [UKMicrowaves] Ecoflex 15?
>
> When Ecoflex is bent, the inner moves compared with the outer and
> can withdraw from the inner connector completely.
>
> Had that happen twice, so always soldered now.
>
> 73
> Pete GM4BYF
>
> On 17/02/21 22:32, Reg Woolley via groups.io wrote:
>
> 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=blueyonder.co.uk@groups.io>
> 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:
>
> 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:
>
> 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.
> _

--
vry 73
Pete GM4BYF
--
vry 73
Pete GM4BYF

--
Stephen Tompsett (G8LYB)
Tel: 01788 578940
Mob: 07956 855816


Re: Ecoflex 15?

Stuart M1GSM
 

As Alwyn said, Stick to the quality stuff.

LMR600 is also available in ultraflex.


Re: Ecoflex 15?

alwyn.seeds1
 

Dear All,

I have not yet measured a length of Ecoflex 15 that met its specified loss, even when new. I have measured very bad suck-outs at frequencies above 2GHz on some samples.

Ecoflex 10 when new, has generally been close to its specified loss.

A difference between cables of this sort (Ecoflex, M&P….) and the Times Microwave LMR Ultraflex series is the low braid coverage. As the foil cracks, radiation losses increase dramatically.

My measurements on Times Microwave LMR 400 Ultraflex show losses close to spec. even on samples that have been flexed for several years. 

Note that I specify “Times Microwave LMR 400 Ultraflex”; there are many fakes, “LMR 400 type” etc etc which I would not vouch for.

Regards,

Alwyn G8DOH 


_____________________________________________________

Alwyn Seeds, Director
SynOptika Ltd.,
114 Beaufort Street,
London,
SW3 6BU,
England.


SynOptika Ltd., Registered in England and Wales: No. 04606737
Registered Office: 114 Beaufort Street, London, SW3 6BU, United Kingdom.
_____________________________________________________


Re: Ecoflex 15?

DF6NA Rainer
 

Hi,

I'm using ECOFLEX15 more than 10 years now on 6 & 9 cm and never had a problem.
Using a BIG-Lift 10m hydraulic tower with a big loop on the roof.

73, Rainer



Am 18.02.2021 um 01:06 schrieb Reg Woolley via groups.io:

As others have stated bend eco flex at your peril.  It won't last long

De Reg g8vhi
Ex RAF Aerial Rigger 



Sent from my Galaxy


-------- Original message --------
From: "Pete - GM4BYF via groups.io" <gm4byf@...>
Date: 17/02/2021 23:59 (GMT+00:00)
Subject: Re: [UKMicrowaves] Ecoflex 15?

When Ecoflex is bent, the inner moves compared with the outer and can withdraw from the inner connector completely.

Had that happen twice, so always soldered now.

73
Pete GM4BYF
On 17/02/21 22:32, Reg Woolley via groups.io wrote:
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)
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:

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:
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.
_


--
vry 73
Pete GM4BYF

--
vry 73
Pete GM4BYF


Re: Ecoflex 15?

Stephen Tompsett
 

Remember that the minimum bend radius in the datasheet is usually for one or a very limited number of bends.

All of the foil and braid construction feeders need to be handled gently, and it is essential to avoid any twisting of the feeder. Messi & Paoloni recommend a minimum of 20x cable OD for repeated bends https://messi.it/ec/pagina.asp?pag=24&l=EN&s=centrale&p=1&mv=166&ml=EN


On 18/02/2021 00:06, Reg Woolley via groups.io wrote:
As others have stated bend eco flex at your peril.  It won't last long

De Reg g8vhi
Ex RAF Aerial Rigger 



Sent from my Galaxy


-------- Original message --------
From: "Pete - GM4BYF via groups.io" <gm4byf@...>
Date: 17/02/2021 23:59 (GMT+00:00)
Subject: Re: [UKMicrowaves] Ecoflex 15?

When Ecoflex is bent, the inner moves compared with the outer and can withdraw from the inner connector completely.

Had that happen twice, so always soldered now.

73
Pete GM4BYF
On 17/02/21 22:32, Reg Woolley via groups.io wrote:
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)
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:

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:
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.
_


--
vry 73
Pete GM4BYF

--
vry 73
Pete GM4BYF
-- 
Stephen Tompsett (G8LYB)
Tel: 01788 578940
Mob: 07956 855816


Re: Ecoflex 15?

Colin Ranson
 

When I operated up to a max of 70cm I swore blind by RG214 around loops and downleads.  Lossy by todays standards now.

 

De G8LBS.

 

Sent from Mail for Windows 10

 

From: Reg Woolley via groups.io
Sent: 18 February 2021 00:06
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Ecoflex 15?

 

As others have stated bend eco flex at your peril.  It won't last long

 

De Reg g8vhi

Ex RAF Aerial Rigger 

 

 

 

Sent from my Galaxy

 

 

-------- Original message --------

From: "Pete - GM4BYF via groups.io" <gm4byf@...>

Date: 17/02/2021 23:59 (GMT+00:00)

To: UKMicrowaves@groups.io

Subject: Re: [UKMicrowaves] Ecoflex 15?

 

When Ecoflex is bent, the inner moves compared with the outer and can withdraw from the inner connector completely.

Had that happen twice, so always soldered now.

73
Pete GM4BYF

On 17/02/21 22:32, Reg Woolley via groups.io wrote:

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)

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:

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:

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.

_

 


--
vry 73
Pete GM4BYF


--
vry 73
Pete GM4BYF

 


Re: Ecoflex 15?

Reg Woolley
 

As others have stated bend eco flex at your peril.  It won't last long

De Reg g8vhi
Ex RAF Aerial Rigger 



Sent from my Galaxy


-------- Original message --------
From: "Pete - GM4BYF via groups.io" <gm4byf@...>
Date: 17/02/2021 23:59 (GMT+00:00)
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Ecoflex 15?

When Ecoflex is bent, the inner moves compared with the outer and can withdraw from the inner connector completely.

Had that happen twice, so always soldered now.

73
Pete GM4BYF
On 17/02/21 22:32, Reg Woolley via groups.io wrote:
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)
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:

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:
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.
_


--
vry 73
Pete GM4BYF

--
vry 73
Pete GM4BYF


Re: Ecoflex 15?

Robin Szemeti - G1YFG
 

I tend to use flexible heliax, FSJ4-50B is my tool of choice.


On Wed, 17 Feb 2021 at 23:04, Neil Smith G4DBN <neil@...> wrote:
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








--
Robin Szemeti - G1YFG


Re: Ecoflex 15?

Pete - GM4BYF
 

When Ecoflex is bent, the inner moves compared with the outer and can withdraw from the inner connector completely.

Had that happen twice, so always soldered now.

73
Pete GM4BYF
On 17/02/21 22:32, Reg Woolley via groups.io wrote:

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)
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:

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:
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.
_


--
vry 73
Pete GM4BYF

--
vry 73
Pete GM4BYF


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


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 
--
Steve G4HTZ 

 

 

Thanks Steve. Looking at specs just it seems LMR600 is better than the LMR400 and Eco15, just by a pip. 

 

ben.

 


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
---------------------------------------


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.

 


Re: Ecoflex 15?

Reg Woolley
 

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:

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:
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.
_


--
vry 73
Pete GM4BYF


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.


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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