Date   

Re: Earth stakes

ian hope (2E0IJH)
 

Many Jobs around Wrotham, Borough Green, Sevenoaks, where there is a heavy layer of Sand we had to put bonded cages in trenches to get sufficent earthing for Substations, The very worse one that took a trench 15m long with 6 cages was Charing, which also has heavy sand. All of these had to be back filled with a GEM type material to improve the Earthing.
 
Ian
M5IJH

 
 
Sent: Monday, September 07, 2020 at 2:28 PM
From: "Ian White" <gm3sek@...>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Earth stakes

Results will depend totally on where you are, and your type of ground.

An old 'In Practice' article http://www.ifwtech.co.uk/g3sek/in-prac/0710.pdf covers many of the points.

I thoroughly agree with both Alwyn and Robin. Here we're on rock, a mixture of hard stones and broken shale, any one of which will stop an earth rod unless I have first drilled a pilot hole (and it's unlikely that rod can be sunk any father than the 1.0m length of the drill bit), the reward for all that effort being an earth resistance of several hundred ohms. That is why our primary mains earth is now a 15m long copper ribbon laid in a trench at the foot of the house walls where it will pick up all the rainwater runoff (that feature is operational right now).

Contrast that with the old QTH in the Thames valley, where the water table was only 2-3ft below ground and a double-length earth rod would sink through the surface clay like butter.

Meanwhile, up on the chalk Downs, a friend resorted to an old copper hot-water cistern - drilled with holes, buried upright, filled with gravel, and then constantly watered by a rainwater diverter from the roof.

73 from Ian GM3SEK

 

 

On 07/09/2020 08:40, alwyn.seeds1 wrote:

Dear Robin,
 
Yes, indeed. 
 
I’m sure there are better methods, but in the Cotswolds, I resorted to a 1m long drill drill to put a hole through any stones in the compacted farmed layer. It was then possible to drive rods through the holes, presumably splitting the stones on the way. Once through this layer, it was possible to continue driving the rest of the 1.5m rod in. After a season the soil movement locks the rod in immoveably. Ground resistance per rod was around 80 ohms, so a lot of rods were needed to provide an acceptable lightning ground.
 
Regards,
 
Alwyn
 
 
_____________________________________________________
 
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: Earth stakes

Ian White
 

Results will depend totally on where you are, and your type of ground.

An old 'In Practice' article http://www.ifwtech.co.uk/g3sek/in-prac/0710.pdf covers many of the points.

I thoroughly agree with both Alwyn and Robin. Here we're on rock, a mixture of hard stones and broken shale, any one of which will stop an earth rod unless I have first drilled a pilot hole (and it's unlikely that rod can be sunk any father than the 1.0m length of the drill bit), the reward for all that effort being an earth resistance of several hundred ohms. That is why our primary mains earth is now a 15m long copper ribbon laid in a trench at the foot of the house walls where it will pick up all the rainwater runoff (that feature is operational right now).

Contrast that with the old QTH in the Thames valley, where the water table was only 2-3ft below ground and a double-length earth rod would sink through the surface clay like butter.

Meanwhile, up on the chalk Downs, a friend resorted to an old copper hot-water cistern - drilled with holes, buried upright, filled with gravel, and then constantly watered by a rainwater diverter from the roof.

73 from Ian GM3SEK



On 07/09/2020 08:40, alwyn.seeds1 wrote:

Dear Robin,

Yes, indeed. 

I’m sure there are better methods, but in the Cotswolds, I resorted to a 1m long drill drill to put a hole through any stones in the compacted farmed layer. It was then possible to drive rods through the holes, presumably splitting the stones on the way. Once through this layer, it was possible to continue driving the rest of the 1.5m rod in. After a season the soil movement locks the rod in immoveably. Ground resistance per rod was around 80 ohms, so a lot of rods were needed to provide an acceptable lightning ground.

Regards,

Alwyn

 
_____________________________________________________

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: Contest scores

Robin Szemeti - G1YFG
 


....I just got a UBN for one of them saying "Not In Log"! I nearly fell off my chair! :)
So whilst you think you can have a successful QSO, your success is as much about the other stations accuracy!
 
I had this on one in 23cm,  we struggled to work the first contact, I thought we had got most of it through ... later on he appeared again much louder and we confirmed the log entry, but he wanted to use the current time ... well, fair enough then, I put him in the lof as a new entry, new serial and new time ... and lost all the points as "not in log" ...

--
Robin Szemeti - G1YFG


Re: Contest scores

Robin Szemeti - G1YFG
 

I always lose points, I try to do better. I suspect there might be dome dyslexia creeping in.

Recent evidence of my idiocy includes recording one station as a G9xxx callsign,  a mistyped 4x9 signal report etc.   I know in the last  2m UKAC I forgot to tell the first contact I was /P ... and when I ran out of log sheets I got a bit confused on the numbers and I fear I gave out one incorrectly, (which would not be so bad, but I think it was XDY, I may never live it down!!)

The last UKAC 2m was a belter, I went portable instead of my usual hole in the ground and worked 147 stations on a 6ele beam, including EI, GJ and other .. best DX was 712km, deep into Germany ...



On Mon, 7 Sep 2020 at 12:52, Neil Smith G4DBN <neil@...> wrote:

The philosophy appears to be that the log entry represents Truth, and that what was actually sent is not relevant.  Recordings are not accepted as evidence, and listening back to recordings to make log corrections after the contest is agin the roolz anyway, so it says here...

There is a little bit of flexibility on the part of the adjudicators. I was hit by a silly config bug in some of my logs where the report was defaulted to 59 even though I sent something else, and the contest adjudicator gave me the hard stare and didn't dock points from the others, but really should have docked me some points for being persistently wrong.

I think the idea is that it all evens out on average.  I've had a few cases where my recording definitely showed a typo or sending error at the other end, but my approach is now to do extra repeats and read back the inbound report for confirmation to the station who made the logging error. 

Could be someone doing manual logging or having a problem with a computer log or doing multiple bands and reading off the serial number for the wrong band.  Or just someone daft and scatty like me. I lost some 250+ point contacts through rubbish logging typos.

Neil G4DBN



On 07/09/2020 12:33, militaryoperator via groups.io wrote:

SN Rx
Correct SN Rx
Reason
Penalties
Notes
2 6








Very odd. a solid 59 contact, heard s/n 2 but senders log apparently says it was 6

I have noticed this before, clearly hearing one thing then told I got it wrong according to other stations log. 

Maybe time to record all qso's, I think I'm being diddled out of points here!! hi. 

Ben
_._,_._


--
Robin Szemeti - G1YFG


Re: Contest scores

Pete - GM4BYF
 

I did an analysis some months ago. At least 50% of my UBNs were due to logging mistakes by the other party.

There's no appeal. A year or two ago one portable station reversed the received and transmitted rst & serials. No penalty to them but  UBNs for a plethora of stations.

73
Pete GM4BYF
On 07/09/20 12:33, militaryoperator via groups.io wrote:


SN Rx
Correct SN Rx
Reason
Penalties
Notes
2 6








Very odd. a solid 59 contact, heard s/n 2 but senders log apparently says it was 6

I have noticed this before, clearly hearing one thing then told I got it wrong according to other stations log. 

Maybe time to record all qso's, I think I'm being diddled out of points here!! hi. 

Ben

--
vry 73
Pete GM4BYF


Re: 28V PSU?

i2NDT
 

sorry no idea!
the label says: 120 - 250 VAC 50/60 Hz.


Re: Contest scores

G1DFL
 

The last SHF UKAC was terrible Wx, operating /P in a storm with 3 dishes not to be recommended.

I did made 2 QSO's on 9cm. With both contacts I made sure to confirm details and there was even time for a friendly natter. Something I enjoy compared to the faster pace of the other Tuesdays.

....I just got a UBN for one of them saying "Not In Log"! I nearly fell off my chair! :)
So whilst you think you can have a successful QSO, your success is as much about the other stations accuracy!

I get my fun from the taking part and all the bodging (aka "amateur engineering") done before. 
Often a lot of that whilst on site of course! 

Regards..Pete
G1DFL

On Monday, September 7, 2020, 12:52:31 PM GMT+1, Neil Smith G4DBN <neil@...> wrote:


The philosophy appears to be that the log entry represents Truth, and that what was actually sent is not relevant.  Recordings are not accepted as evidence, and listening back to recordings to make log corrections after the contest is agin the roolz anyway, so it says here...

There is a little bit of flexibility on the part of the adjudicators. I was hit by a silly config bug in some of my logs where the report was defaulted to 59 even though I sent something else, and the contest adjudicator gave me the hard stare and didn't dock points from the others, but really should have docked me some points for being persistently wrong.

I think the idea is that it all evens out on average.  I've had a few cases where my recording definitely showed a typo or sending error at the other end, but my approach is now to do extra repeats and read back the inbound report for confirmation to the station who made the logging error. 

Could be someone doing manual logging or having a problem with a computer log or doing multiple bands and reading off the serial number for the wrong band.  Or just someone daft and scatty like me. I lost some 250+ point contacts through rubbish logging typos.

Neil G4DBN



On 07/09/2020 12:33, militaryoperator via groups.io wrote:

SN Rx
Correct SN Rx
Reason
Penalties
Notes
26








Very odd. a solid 59 contact, heard s/n 2 but senders log apparently says it was 6

I have noticed this before, clearly hearing one thing then told I got it wrong according to other stations log. 

Maybe time to record all qso's, I think I'm being diddled out of points here!! hi. 

Ben
_._,_._


Re: Contest scores

Neil Smith G4DBN
 

The philosophy appears to be that the log entry represents Truth, and that what was actually sent is not relevant.  Recordings are not accepted as evidence, and listening back to recordings to make log corrections after the contest is agin the roolz anyway, so it says here...

There is a little bit of flexibility on the part of the adjudicators. I was hit by a silly config bug in some of my logs where the report was defaulted to 59 even though I sent something else, and the contest adjudicator gave me the hard stare and didn't dock points from the others, but really should have docked me some points for being persistently wrong.

I think the idea is that it all evens out on average.  I've had a few cases where my recording definitely showed a typo or sending error at the other end, but my approach is now to do extra repeats and read back the inbound report for confirmation to the station who made the logging error. 

Could be someone doing manual logging or having a problem with a computer log or doing multiple bands and reading off the serial number for the wrong band.  Or just someone daft and scatty like me. I lost some 250+ point contacts through rubbish logging typos.

Neil G4DBN



On 07/09/2020 12:33, militaryoperator via groups.io wrote:

SN Rx
Correct SN Rx
Reason
Penalties
Notes
2 6








Very odd. a solid 59 contact, heard s/n 2 but senders log apparently says it was 6

I have noticed this before, clearly hearing one thing then told I got it wrong according to other stations log. 

Maybe time to record all qso's, I think I'm being diddled out of points here!! hi. 

Ben
_._,_._


Re: Contest scores

Andy G4JNT
 

This automated robot contest entry just seems to suck the fun out of things



On Mon, 7 Sep 2020 at 12:33, militaryoperator via groups.io <Military1944=aol.com@groups.io> wrote:

SN Rx
Correct SN Rx
Reason
Penalties
Notes
26

Very odd. a solid 59 contact, heard s/n 2 but senders log apparently says it was 6

I have noticed this before, clearly hearing one thing then told I got it wrong according to other stations log. 

Maybe time to record all qso's, I think I'm being diddled out of points here!! hi. 

Ben


Contest scores

militaryoperator
 


SN Rx
Correct SN Rx
Reason
Penalties
Notes
26

Very odd. a solid 59 contact, heard s/n 2 but senders log apparently says it was 6

I have noticed this before, clearly hearing one thing then told I got it wrong according to other stations log. 

Maybe time to record all qso's, I think I'm being diddled out of points here!! hi. 

Ben


Re: 28V PSU?

Mark - M0WGF
 

The Ericsson PSU are good value.  

You can adjust the output voltage up to 28.2V using a pot located under the heatsink.  I can't remember which one but I can open the unit and have a look if it's at all useful?

They run hot even under idle (approx 50C) so you need a fan to keep them cool a single fan over the top of the heatsink would do.  I used two fans which on hindsight was overkill. 

If you can find the same style of binding posts they screw tight into the original socket which is handy and saves some modifications.  

73 Mark
M0WGF


Re: G0MRF downconverter

Andy G4JNT
 

I think we're going round in circles
There is no problem

I only originally took issue with the comment that stated "mandated" in a set of guidelines that had no legal force.
If it had simply said users SHOULD be able to monitor their downlink while transmitting, and left it at that, honour would have been satisfied.



On Mon, 7 Sep 2020 at 11:03, John E. Beech <john@...> wrote:
Hi Andy,
            That's what I thought, so what's the problem/

de John G8SEQ

>  -------Original Message-------
>  From: Andy G4JNT <andy.g4jnt@...>
>  To: UK Microwaves groups.io <UKMicrowaves@groups.io>
>  Subject: Re: [UKMicrowaves] G0MRF downconverter
>  Sent: Sep 07 '20 10:25

>  It can't not count.
>  It's just receiver, like any other

>  Andy
www.g4jnt.com

>  On Mon, 7 Sep 2020 at 10:17, John E. Beech <john@...> wrote:

>  > Does using Goonhilly SDR count?
>  >
>  > de John G8SEQ
>  >
>  >> -------Original Message-------
>  >> From: Mike Willis <willis.mj@...>
>  >> To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
>  >> Subject: Re: [UKMicrowaves] G0MRF downconverter
>  >> Sent: Sep 06 '20 13:11
>  >>
>  >> But Andy,
>  >>
>  >> Its the rule. We might not like the rules but we have to follow
>  > them.
>  >> One of these is you need to be able to monitor your downlink
>  > while
>  >> transmitting. It's doesn't say listen, looking at a waterfall
>  > ought to
>  >> do. The ones sending dirty signals are generally those that are
>  > not
>  >> doing this. They go out and buy things expecting they will work
>  > and
>  >> not realising that they should not over drive amplifiers etc.
>  > Anyway,
>  >> it doesn't really matter what we think about these rules as
>  > AMSAT-DL
>  >> and the Sponsors have set rules for us to abide by, one of which
>  > is
>  >> "Full duplex operation is mandatory (you must be able to monitor
>  > your
>  >> own downlink while transmitting!)"
>  >>
>  >>
>  >
https://amsat-dl.org/en/p4-a-nb-transponder-bandplan-and-operating-guidelines/
>  >> --
>  >> Mike G0MJW
>  >>






Re: G0MRF downconverter

John E. Beech
 

Hi Andy,
That's what I thought, so what's the problem/

de John G8SEQ

-------Original Message-------
From: Andy G4JNT <andy.g4jnt@gmail.com>
To: UK Microwaves groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] G0MRF downconverter
Sent: Sep 07 '20 10:25

It can't not count.
It's just receiver, like any other

Andy
www.g4jnt.com

On Mon, 7 Sep 2020 at 10:17, John E. Beech <john@g8seq.com> wrote:

> Does using Goonhilly SDR count?
>
> de John G8SEQ
>
>> -------Original Message-------
>> From: Mike Willis <willis.mj@gmail.com>
>> To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
>> Subject: Re: [UKMicrowaves] G0MRF downconverter
>> Sent: Sep 06 '20 13:11
>>
>> But Andy,
>>
>> Its the rule. We might not like the rules but we have to follow
> them.
>> One of these is you need to be able to monitor your downlink
> while
>> transmitting. It's doesn't say listen, looking at a waterfall
> ought to
>> do. The ones sending dirty signals are generally those that are
> not
>> doing this. They go out and buy things expecting they will work
> and
>> not realising that they should not over drive amplifiers etc.
> Anyway,
>> it doesn't really matter what we think about these rules as
> AMSAT-DL
>> and the Sponsors have set rules for us to abide by, one of which
> is
>> "Full duplex operation is mandatory (you must be able to monitor
> your
>> own downlink while transmitting!)"
>>
>>
>
https://amsat-dl.org/en/p4-a-nb-transponder-bandplan-and-operating-guidelines/
>> --
>> Mike G0MJW
>>


Re: Earth stakes

John E. Beech
 

You can improve ground conductivity by watering with fertilizer. No good if it dries out until next time it rains!

de John G8SEQ

-------Original Message-------
From: Paul Randall G3NJV <paulfrandall@hotmail.com>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Earth stakes
Sent: Sep 06 '20 23:48

Using mains pressure water down a copper tube with handles so it can
be twisted about comes to mind. Stones are a problem.
Julian, unless you live on a salt bog or wet clay, try Plan B.

I echo Robins points and add the following.
An HF vertical will almost always do better with radials instead of
earth rods, unless you are on a bog or beach. Those who have worked
hard to get an efficient vertical often end up with 32, 64 or even
more radials. On topband, and I imagine even lower, do anything to
avoid relying on ground rods.
With no alternative, use whatever works in your location, but put in
as many as you can manage and water them, I recall suggestions to use
chemical additive - what??????

I use a vertical loop on top band, the trees I thought an obstacle
ended up supporting the loop - hell yes my 100W heats them up, but
enough escapes to make it a fantastic antenna, transatlantic most days
FT8, no ground needed.

Cheers,

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

FROM: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of
Robin Szemeti - G1YFG <robin@redpoint.org.uk>
SENT: 06 September 2020 19:09
TO: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
SUBJECT: Re: [UKMicrowaves] Earth stakes

You could just save the copper and effort and not bother?

Try measuring the actual impedance of an "earth stake" and it is
frequently in the hundreds or even thousands of ohms in stony ground.
At best, they help discharge a little static. On 160m, I radiate a
decent signal, and my ground system is bits of wire, fences and
associate bits of metalwork that I have been able to press into
service. The feed point impedance is quite low, I doubt an "earth
stake" would have any benefit at all.

On Sun, 6 Sep 2020 at 18:40, Reg Woolley via groups.io
<g8vhi=btinternet.com@groups.io> wrote:

> Hilti drills have an attachment that hammmer earth spikes in. Maybe
> worth trying your local hire shop. They go in real easy that way.
>
> Reg g8vhi
>
> Sent from Samsung tablet.
>
> -------- Original message --------
> From: Martin Phillips G4CIO <martin@douglas-phillips.org.uk>
> Date: 06/09/2020 18:10 (GMT+00:00)
> To: UKMicrowaves@groups.io
> Subject: Re: [UKMicrowaves] Earth stakes
>
> A very large SDS drill. They sometimes have them at bargain prices
> in Aldi. I've got a 1 m x 25 mm one.
>
> On 6/9/20 6:04 PM, g4zod@btinternet.com via groups.io wrote:
>
>> Not quite microwaves, but still radio.
>>
>> I have been trying to drive in earth stakes for my shack and HF
>> vertical.
>>
>> I have tried using a sharped rod and a club hammer to start the
>> hole ,but I am not really succeeding. (I also pour water into the
>> hole to soften things up whilst driving the rod.)
>>
>> I use 25 mm copper tubes and 10 mm copper coated rods.
>>
>> Any advice on the best way to get about a Metre into stoney soil?
>>
>> ( The Dragon will not be happy if I dig out large holes on "her
>> garden".
>>
>> Many thanks.
>>
>> G4ZOD
>>
>> Sent from BlueMail

--
Robin Szemeti - G1YFG


Re: G0MRF downconverter

Andy G4JNT
 

It can't not count.
It's just  receiver, like any other



On Mon, 7 Sep 2020 at 10:17, John E. Beech <john@...> wrote:
Does using Goonhilly SDR count?

de John G8SEQ

>  -------Original Message-------
>  From: Mike Willis <willis.mj@...>
>  To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
>  Subject: Re: [UKMicrowaves] G0MRF downconverter
>  Sent: Sep 06 '20 13:11

>  But Andy,

>  Its the rule. We might not like the rules but we have to follow them.
>  One of these is you need to be able to monitor your downlink while
>  transmitting. It's doesn't say listen, looking at a waterfall ought to
>  do. The ones sending dirty signals are generally those that are not
>  doing this. They go out and buy things expecting they will work and
>  not realising that they should not over drive amplifiers etc. Anyway,
>  it doesn't really matter what we think about these rules as AMSAT-DL
>  and the Sponsors have set rules for us to abide by, one of which is
>  "Full duplex operation is mandatory (you must be able to monitor your
>  own downlink while transmitting!)"

https://amsat-dl.org/en/p4-a-nb-transponder-bandplan-and-operating-guidelines/
>  --
>  Mike G0MJW





Re: Earth stakes

Don Hawbaker
 

It will sometimes help if you drive the rod at an angle.


On Sep 7, 2020 at 3:41 AM, <alwyn.seeds1> wrote:

Dear Robin,

Yes, indeed. 

I’m sure there are better methods, but in the Cotswolds, I resorted to a 1m long drill drill to put a hole through any stones in the compacted farmed layer. It was then possible to drive rods through the holes, presumably splitting the stones on the way. Once through this layer, it was possible to continue driving the rest of the 1.5m rod in. After a season the soil movement locks the rod in immoveably. Ground resistance per rod was around 80 ohms, so a lot of rods were needed to provide an acceptable lightning ground.

Regards,

Alwyn

 
_____________________________________________________

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: G0MRF downconverter

John E. Beech
 

Does using Goonhilly SDR count?

de John G8SEQ

-------Original Message-------
From: Mike Willis <willis.mj@gmail.com>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] G0MRF downconverter
Sent: Sep 06 '20 13:11

But Andy,

Its the rule. We might not like the rules but we have to follow them.
One of these is you need to be able to monitor your downlink while
transmitting. It's doesn't say listen, looking at a waterfall ought to
do. The ones sending dirty signals are generally those that are not
doing this. They go out and buy things expecting they will work and
not realising that they should not over drive amplifiers etc. Anyway,
it doesn't really matter what we think about these rules as AMSAT-DL
and the Sponsors have set rules for us to abide by, one of which is
"Full duplex operation is mandatory (you must be able to monitor your
own downlink while transmitting!)"

https://amsat-dl.org/en/p4-a-nb-transponder-bandplan-and-operating-guidelines/
--
Mike G0MJW


Re: Farnham and Mow Cop SDRs

Neil Smith G4DBN
 

I tried Mow Cop last night and I was very weak on it. I couldn’t hear much here, just RS from PKT, LEX and OSW, and Mow Cop wasn’t seeing OSW.
https://tropo.f5len.org/forecasts-for-europe/ shows a bit of enhancement overnight sinking away southwards, but the Midlands are blanketed in absorbent drizzle.
Neil G4DBN


On 7 Sep 2020, at 07:34, Adrian G4UVZ via groups.io <adrianwhatmore248@...> wrote:

Can anyone confirm that these are currently working?

I thought this misty September morning looked as if there might be a bit of dx about on 3cms..however no sign of any signals on either SDR.

Normally at least GB3SEE is present on Farnham.


Re: Re slow turnaround?

Andy
 

I would bet a significant amount of cash on the problem being with aol.com.  A simple fix would be to use a reputable email provider with a decent quality of service unlike the sub-optimal service provided aol.   I base this on years of running webservers that email users with things like password reminders etc. If the user has Yahoo, aol as their email provider then I know there will be problems. (There's a stack of US providers who are just as bad, Comcast for one.)

Andy



From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of militaryoperator via groups.io <Military1944@...>
Sent: Saturday, September 5, 2020 7:45 AM
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: [UKMicrowaves] Re slow turnaround?
 
odd. 

sent at 14:36, received at 15:35

Ben


-----Original Message-----
From: militaryoperator via groups.io <Military1944@...>
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Sent: Sat, 5 Sep 2020 14:42
Subject: [UKMicrowaves] on 10g now

anyone on 10GHz now?

Ben G4BXD IO82UJ


Re: Earth stakes

alwyn.seeds1
 

Dear Robin,

Yes, indeed. 

I’m sure there are better methods, but in the Cotswolds, I resorted to a 1m long drill drill to put a hole through any stones in the compacted farmed layer. It was then possible to drive rods through the holes, presumably splitting the stones on the way. Once through this layer, it was possible to continue driving the rest of the 1.5m rod in. After a season the soil movement locks the rod in immoveably. Ground resistance per rod was around 80 ohms, so a lot of rods were needed to provide an acceptable lightning ground.

Regards,

Alwyn

 
_____________________________________________________

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.
_____________________________________________________

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