Date   

Re: Clarke masts

Paul <paul@...>
 

Hi Alan

Do you know which models the legs fit? I'm looking for some legs for a 30ft PT1. And a 24mm stub for the top socket.

73 Paul G4DCV

On 03/10/2013 11:01, Alan Melia wrote:
 

Hi Mike one of my friends still has a mast I believe, but I have 3
telescopic legs that will form a tripod the was used with a 50ft (or there
abouts) version. I dont have the collar that goes round the mast, because
that was used to mount it on the rear of a trailervan. I am open to offers
if you or anyone else is interested.

Alan
G3NYK

No virus found in this message.
Checked by AVG - www.avg.com
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Re: Clarke masts

Michael Scott
 

Hi Alan
 
Thanks for the offer, but if I get one, I intend to mount it against a wall with suitable brackets.
 
73, Mike

----- Original Message -----
From: Alan Melia
Sent: Thursday, October 03, 2013 11:01 AM
Subject: [ukmicrowaves] Clarke masts

 

Hi Mike one of my friends still has a mast I believe, but I have 3
telescopic legs that will form a tripod the was used with a 50ft (or there
abouts) version. I dont have the collar that goes round the mast, because
that was used to mount it on the rear of a trailervan. I am open to offers
if you or anyone else is interested.

Alan
G3NYK


Re: Power rating of SMA relays

G4WIM KT6UK
 

Thanks to everyone who replied with data, links advice etc.

Looks like I could use one or more on my 13cm project quite safely.

I must have about a dozen of the Narda types - mostly brand new but all 28V coil operation.

If anyone wants to trade some 13cm bits and bobs to aid my 13cm transverter project - just e mail me.

73 Tim G4WIM / KT6UK


5-6 October Weekend Contests

Martin A Hall <gorrell77@...>
 

The RSGB Trophy, RSGB/IARU 432 MHz and Up and the UKuG Low Band Contests are being held this weekend.  I plan to be active as follows:
 
Callsign : GM8IEM
Locator : IO78HF
Bands: 1.3GHz - 150W, 67 el Wimo; 432 MHz - 300W, 28 el M^2
Talkback : Direct CQ, ON4KST (note that the use of ON4KST to set up contacts is permitted on 70cm as well as 23cm for this contest - see RSGB General Rule 4j)
Modes: Primarily SSB, but also CW and JT modes
Times: 1400-1400, during waking hours, although domestic duties will take me out of the shack from time to time!

Hopefully there will be some tropo about, otherwise I shall be looking for contacts via aircraft reflections.

73,
Martin
GM8IEM - IO78HF
 


Re: IO91RF in Low Microwave Bands 6-Oct

G8IFT Yahoo <g8ift_2002@...>
 

Hi,

 

This weekend also sees the 432 MHz to 248 GHz event and on Saturday the 1,296 and 2,320 MHz trophy events.

 

G3OHM/P will be on from IO92GB running 400w on both bands for the Trophy period only, so like a number of other stations will have no operation during Sunday.

 

Seems a pity that it looks like we will not be having a QSO with G1EHF/P.  I guess the overall result is spread the activity, so better  for the 24 hour event but not so good for those operating in the Trophy and low band events.  

 

Regards

 

Ian

G8IFT

From: ukmicrowaves@... [mailto:ukmicrowaves@...] On Behalf Of David.Austen@...
Sent: 02 October 2013 09:52
To: ukmicrowaves@...
Subject: RE: Re: [ukmicrowaves] IO91RF in Low Microwave Bands 6-Oct

 

 

To confirm our details:

 

G1EHF, G4SJH, G3TCT, G3TCU, G3WBQ will be active as G1EHF/P from IO91RF on Sunday with:

 

23 cm = 250W to 4 x 35 element @ 9 m

13 cm = 60W to 90 cm dish @ 5 m

9 cm = 10W to 70 cm dish @ 7 m

 

We will also have 144MHz talk-back and ON4KST (separate sign-ons for 23 cm and 13 + 9 cm)

 

Hope to work you all!

 

Dave, G1EHF



---In ukmicrowaves@..., <ukmicrowaves@...> wrote:

The group of us who often activate IO91RF in the Low Microwave Bands sessions will be on next Sunday.
(G1EHF, G4SJH, G3TCT, G3TCU, G3WBQ) we'll post the details asap.
We couldn't make the June session as we nearly all had other commitments.

There will have to be lots of good Dx QSOs to justify the early start!

73, Phil.

 

On 28/09/2013 14:29, Ralph Bird wrote:

 

If I get shot down, I will deploy a parachute!.

 

Seriously:

I am increasingly more and more alarmed at

the numbers who indicate that they are to be

active for the contests.

 

Investment apart, the time I put to these events

is increasingly becoming counter productive.

 

I know there are a few who choose not to indicate

their intentions via this reflector, but one cannot

deny that numbers are dropping off.

 

I am active every day. sickness and Christmas day

being the only exceptions.  I know that is my choice but

'Surely',  when you see the numbers active on the

reflector,  some of you could boost the

activity,  even if its only for an hour or two.

 

Like it or not, I still say that if I did not have that

window into France. This station would have been

sold off after 50 years being an active radio amateur,

starting as VQ8BY in 1963 while in Mauritius with the R.N.

to buy a Leica M9 and get a life.

 

Please, please switch on your gear, maybe you may

even enjoy it. Also answer the often debated topic on here

of   "Activity on the bands"., simple!.

 

73 Ralph

G4ALY

 

 


Clarke masts

Alan Melia
 

Hi Mike one of my friends still has a mast I believe, but I have 3 telescopic legs that will form a tripod the was used with a 50ft (or there abouts) version. I dont have the collar that goes round the mast, because that was used to mount it on the rear of a trailervan. I am open to offers if you or anyone else is interested.

Alan
G3NYK


Re: Pneumatic masts

Mike Willis
 

Mike

...its possibly too late to consider replacing the wife. The pneumatic masts are very good, as are Tennamasts. I would not worry too much about the seals. It took a few years for ours to fail and they can be replaced. Something that will go up to over 20m with a lowered length of about 3m is very nice. With just the bottom sections, you probably won't need to guy it and it will still be a useful height.

Mike

 



---In ukmicrowaves@..., <g3lyp@...> wrote:

Hi Frank
 
Unfortunately, as there is also a garage in the way the only way it could go was through the bush!
 
Mike

----- Original Message -----
Sent: Wednesday, October 02, 2013 5:26 PM
Subject: RE: [ukmicrowaves] RE: Pneumatic masts

 

I had that problem -my greenhouse was in the way. So Tennamast made me a custom mounting so that it did not go over at right angles to the wall but at about 30 degrees!
 
Frank GW8AWM
 
 
-----Original Message-----
From: ukmicrowaves@... [mailto:ukmicrowaves@...] On Behalf Of Michael Scott
Sent: 02 October 2013 16:52
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] RE: Pneumatic masts

 

Hi Gary, Mike
 
Many thanks for the helpful comments. I understand from talking to the rep at Newark that they do not recommend liquid silicone as this causes the seals to deteriorate.
 
OK on the price, I did consider a Tennamast which would be cheaper, but to luff it would require the removal of a rather nice ornamental bush which my wife was not too happy about!
 
73, Mike
----- Original Message -----
Sent: Wednesday, October 02, 2013 10:55 AM
Subject: [ukmicrowaves] RE: Pneumatic masts

 

I have three clarke mast's...
two are portable/vehicle mount and work great, as mentions ONLY use silcone as lubricant I find the spray/liquid better but they do say use grease.

the only mast I bought (SCAM12) for my new QTH to set up a home microwave station fails to pump up, this was bought as a working item!
the air seems to be leaking from the 3rd section so I need to sort that before I can mount it on the workshop.

Clarke are very good at responding to e-mails and have even sent me service docs for the SCAM (digital format)
at this moment in time I find there prices a little hard to swallow (Yorkshire man HI)

As mentioned before in breezy and or with heavier payloads they do need guying.

73's Gary (M1EGI)


Re: Pneumatic masts

Michael Scott
 

Hi Frank
 
Unfortunately, as there is also a garage in the way the only way it could go was through the bush!
 
Mike

----- Original Message -----
Sent: Wednesday, October 02, 2013 5:26 PM
Subject: RE: [ukmicrowaves] RE: Pneumatic masts

 

I had that problem -my greenhouse was in the way. So Tennamast made me a custom mounting so that it did not go over at right angles to the wall but at about 30 degrees!
 
Frank GW8AWM
 
 
-----Original Message-----
From: ukmicrowaves@... [mailto:ukmicrowaves@...] On Behalf Of Michael Scott
Sent: 02 October 2013 16:52
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] RE: Pneumatic masts

 

Hi Gary, Mike
 
Many thanks for the helpful comments. I understand from talking to the rep at Newark that they do not recommend liquid silicone as this causes the seals to deteriorate.
 
OK on the price, I did consider a Tennamast which would be cheaper, but to luff it would require the removal of a rather nice ornamental bush which my wife was not too happy about!
 
73, Mike
----- Original Message -----
Sent: Wednesday, October 02, 2013 10:55 AM
Subject: [ukmicrowaves] RE: Pneumatic masts

 

I have three clarke mast's...
two are portable/vehicle mount and work great, as mentions ONLY use silcone as lubricant I find the spray/liquid better but they do say use grease.

the only mast I bought (SCAM12) for my new QTH to set up a home microwave station fails to pump up, this was bought as a working item!
the air seems to be leaking from the 3rd section so I need to sort that before I can mount it on the workshop.

Clarke are very good at responding to e-mails and have even sent me service docs for the SCAM (digital format)
at this moment in time I find there prices a little hard to swallow (Yorkshire man HI)

As mentioned before in breezy and or with heavier payloads they do need guying.

73's Gary (M1EGI)


Re: Pneumatic masts

frank evans <frank@...>
 

I had that problem -my greenhouse was in the way. So Tennamast made me a custom mounting so that it did not go over at right angles to the wall but at about 30 degrees!
 
Frank GW8AWM
 
 

-----Original Message-----
From: ukmicrowaves@... [mailto:ukmicrowaves@...] On Behalf Of Michael Scott
Sent: 02 October 2013 16:52
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] RE: Pneumatic masts

 

Hi Gary, Mike
 
Many thanks for the helpful comments. I understand from talking to the rep at Newark that they do not recommend liquid silicone as this causes the seals to deteriorate.
 
OK on the price, I did consider a Tennamast which would be cheaper, but to luff it would require the removal of a rather nice ornamental bush which my wife was not too happy about!
 
73, Mike
----- Original Message -----
Sent: Wednesday, October 02, 2013 10:55 AM
Subject: [ukmicrowaves] RE: Pneumatic masts

 

I have three clarke mast's...
two are portable/vehicle mount and work great, as mentions ONLY use silcone as lubricant I find the spray/liquid better but they do say use grease.

the only mast I bought (SCAM12) for my new QTH to set up a home microwave station fails to pump up, this was bought as a working item!
the air seems to be leaking from the 3rd section so I need to sort that before I can mount it on the workshop.

Clarke are very good at responding to e-mails and have even sent me service docs for the SCAM (digital format)
at this moment in time I find there prices a little hard to swallow (Yorkshire man HI)

As mentioned before in breezy and or with heavier payloads they do need guying.

73's Gary (M1EGI)


Re: Pneumatic masts

Michael Scott
 

Hi Gary, Mike
 
Many thanks for the helpful comments. I understand from talking to the rep at Newark that they do not recommend liquid silicone as this causes the seals to deteriorate.
 
OK on the price, I did consider a Tennamast which would be cheaper, but to luff it would require the removal of a rather nice ornamental bush which my wife was not too happy about!
 
73, Mike

----- Original Message -----
Sent: Wednesday, October 02, 2013 10:55 AM
Subject: [ukmicrowaves] RE: Pneumatic masts

 

I have three clarke mast's...
two are portable/vehicle mount and work great, as mentions ONLY use silcone as lubricant I find the spray/liquid better but they do say use grease.

the only mast I bought (SCAM12) for my new QTH to set up a home microwave station fails to pump up, this was bought as a working item!
the air seems to be leaking from the 3rd section so I need to sort that before I can mount it on the workshop.

Clarke are very good at responding to e-mails and have even sent me service docs for the SCAM (digital format)
at this moment in time I find there prices a little hard to swallow (Yorkshire man HI)

As mentioned before in breezy and or with heavier payloads they do need guying.

73's Gary (M1EGI)


Monitoring of the EA 23cm bkn

Ralph
 

Ref:EA2TZ/B
Unable to detect the beacon if it is now running at 20W due
to severe interference across 23cm today.
Maybe stations outside my immediate area may be more successful.
 
73
Ralph G4ALY


Re: Pneumatic masts

Gary M1EGI
 

I have three clarke mast's...
two are portable/vehicle mount and work great, as mentions ONLY use silcone as lubricant I find the spray/liquid better but they do say use grease.

the only mast I bought (SCAM12) for my new QTH to set up a home microwave station fails to pump up, this was bought as a working item!
the air seems to be leaking from the 3rd section so I need to sort that before I can mount it on the workshop.

Clarke are very good at responding to e-mails and have even sent me service docs for the SCAM (digital format)
at this moment in time I find there prices a little hard to swallow (Yorkshire man HI)

As mentioned before in breezy and or with heavier payloads they do need guying.

73's Gary (M1EGI)


Fw: Beacon 20W

Ralph
 

Good morning,
 
Following received from Spain this morning
about the EA2TZ/B on 23cm in IN93BF 1296.8550.
Please spot this beacon when heard as it will be much
appreciated having been only operational for a short
time it has gone from 2W to 5W and now 20W.
73
Ralph G4ALY
Unable to receive anything here yet -"Radar type" interference
probably from the Grey funnel line.

----- Original Message -----
Sent: Wednesday, October 02, 2013 9:50 AM
Subject: Beacon 20W

Hello.
Today Wednesday Day 2 I will put another amplifier to the beacon, this is 20W.
Now only improve the system would remain readiante to other areas, keeping this now.
 
A greeting
 
Josemi
EA2TZ

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3408 / Virus Database: 3222/6716 - Release Date: 10/02/13


Re: Pneumatic masts

Mike
 

Hi Mike.


There to manky Mike's answering this post.


I found Clarke's very helpful as I managed to pick up an old ST1 a few years ago and I needed some brackets for wall mounting. Which still has not been done-ah life.

But I agree with Mike G0MJW, about the seals and you need to keep a pot of silicon grease handy to grease the pistons.

The Royal Observer Corp used them on their Master Posts and that was their main problem was sticking sections.


Regards,


Mike G4WYZ



---In ukmicrowaves@..., <g3lyp@...> wrote:


Thanks for that Mike. Yes, I am only intending to use it for small microwave antennas. At the moment If I want to add a new antenna it means getting out ladders and climbing on the roof, and I am getting too old for that!!
 
If I can add or remove an antenna easily, I might even get on the air!
 
73, Mike, G3LYP

----- Original Message -----
Sent: Wednesday, October 02, 2013 9:00 AM
Subject: [ukmicrowaves] RE: Pneumatic masts

 

We had a 20m mast on a landrover and used it for many years. The issues are the seals eventually fail and need replacing. However, perhaps more of a problem is the lack of rigidity. You do need to guy it and it limits the antennas - don't try and fit a 40m yagi on it or a large dish. A small dish, e.g. 1.2m mesh should be OK though. The big advantage is you can usually turn the entire mast easily by hand no rotator to worry about and when fully down the antennas are at a very manageable height.


Mike G0MJW



---In ukmicrowaves@..., <ukmicrowaves@...> wrote:

Hi All
 
have decided to buy a pneumatic mast and had a look at the products from Clark and Total Mast Solutions at Newark last Friday. On balance, the Clark ones look to be slightly more sturdy, but wonder if anyone has experience of dealing with either company, and can make any recommendations.
 
Probably best to do it to me direct.
 
Many thanks in advance.
 
Mike, G3LYP


Re: IO91RF in Low Microwave Bands 6-Oct

David.Austen@...
 

To confirm our details:

 

G1EHF, G4SJH, G3TCT, G3TCU, G3WBQ will be active as G1EHF/P from IO91RF on Sunday with:

 

23 cm = 250W to 4 x 35 element @ 9 m

13 cm = 60W to 90 cm dish @ 5 m

9 cm = 10W to 70 cm dish @ 7 m

 

We will also have 144MHz talk-back and ON4KST (separate sign-ons for 23 cm and 13 + 9 cm)

 

Hope to work you all!

 

Dave, G1EHF



---In ukmicrowaves@..., <ukmicrowaves@...> wrote:

The group of us who often activate IO91RF in the Low Microwave Bands sessions will be on next Sunday.
(G1EHF, G4SJH, G3TCT, G3TCU, G3WBQ) we'll post the details asap.
We couldn't make the June session as we nearly all had other commitments.

There will have to be lots of good Dx QSOs to justify the early start!

73, Phil.

 

On 28/09/2013 14:29, Ralph Bird wrote:
 
If I get shot down, I will deploy a parachute!.
 
Seriously:
I am increasingly more and more alarmed at
the numbers who indicate that they are to be
active for the contests.
 
Investment apart, the time I put to these events
is increasingly becoming counter productive.
 
I know there are a few who choose not to indicate
their intentions via this reflector, but one cannot
deny that numbers are dropping off.
 
I am active every day. sickness and Christmas day
being the only exceptions.  I know that is my choice but
'Surely',  when you see the numbers active on the
reflector,  some of you could boost the
activity,  even if its only for an hour or two.
 
Like it or not, I still say that if I did not have that
window into France. This station would have been
sold off after 50 years being an active radio amateur,
starting as VQ8BY in 1963 while in Mauritius with the R.N.
to buy a Leica M9 and get a life.
 
Please, please switch on your gear, maybe you may
even enjoy it. Also answer the often debated topic on here
of   "Activity on the bands"., simple!.
 
73 Ralph
G4ALY
 


Re: Pneumatic masts

Michael Scott
 


Thanks for that Mike. Yes, I am only intending to use it for small microwave antennas. At the moment If I want to add a new antenna it means getting out ladders and climbing on the roof, and I am getting too old for that!!
 
If I can add or remove an antenna easily, I might even get on the air!
 
73, Mike, G3LYP

----- Original Message -----
Sent: Wednesday, October 02, 2013 9:00 AM
Subject: [ukmicrowaves] RE: Pneumatic masts

 

We had a 20m mast on a landrover and used it for many years. The issues are the seals eventually fail and need replacing. However, perhaps more of a problem is the lack of rigidity. You do need to guy it and it limits the antennas - don't try and fit a 40m yagi on it or a large dish. A small dish, e.g. 1.2m mesh should be OK though. The big advantage is you can usually turn the entire mast easily by hand no rotator to worry about and when fully down the antennas are at a very manageable height.


Mike G0MJW



---In ukmicrowaves@..., wrote:

Hi All
 
have decided to buy a pneumatic mast and had a look at the products from Clark and Total Mast Solutions at Newark last Friday. On balance, the Clark ones look to be slightly more sturdy, but wonder if anyone has experience of dealing with either company, and can make any recommendations.
 
Probably best to do it to me direct.
 
Many thanks in advance.
 
Mike, G3LYP


Re: Pneumatic masts

Mike Willis
 

We had a 20m mast on a landrover and used it for many years. The issues are the seals eventually fail and need replacing. However, perhaps more of a problem is the lack of rigidity. You do need to guy it and it limits the antennas - don't try and fit a 40m yagi on it or a large dish. A small dish, e.g. 1.2m mesh should be OK though. The big advantage is you can usually turn the entire mast easily by hand no rotator to worry about and when fully down the antennas are at a very manageable height.


Mike G0MJW



---In ukmicrowaves@..., <ukmicrowaves@...> wrote:

Hi All
 
have decided to buy a pneumatic mast and had a look at the products from Clark and Total Mast Solutions at Newark last Friday. On balance, the Clark ones look to be slightly more sturdy, but wonder if anyone has experience of dealing with either company, and can make any recommendations.
 
Probably best to do it to me direct.
 
Many thanks in advance.
 
Mike, G3LYP


Re: Power rating of SMA relays

Graham Kimbell G3TCT <g3tct@...>
 

Hi Tim

I found this in relation to Narda SEM SMA relays, I imagine the ms-sma relay to be similar. I've run about 40W at 23cm through mine - haven't destroyed them yet!

http://www.nardamicrowave.com/east/pdfs/standardCustomEMSwitches/PowerHandlingCapability.pdf

73
Graham


Re: Power rating of SMA relays

Grant Hodgson <grant@...>
 

Tim

Not sure about the Narda, but the datasheet for the Radiall is easy to find, this link should work :-

https://radiall-files.s3.amazonaws.com/tds/ramses/R570313000.pdf

- it says 240W average power.

regards

Grant G8UBN

Quoting tim.forrester@gmail.com:



I have an assortment of SMA relays made by Radiall and Narda

The Radiall units are rated 0-3GHz and part number R570313000 and the
Narda's are MS-SMA-020 FSCM99899

No matter how much I search I cannot seem to find out what their power
handling ratings are.

Any ideas ?

73 Tim G4WIM KT6UK


Links:
------
[1] mailto:tim.forrester@gmail.com?subject=Re%3A%20Power%20rating%20of%20SMA%20relays
[2] mailto:ukmicrowaves@yahoogroups.com?subject=Re%3A%20Power%20rating%20of%20SMA%20relays
[3] http://groups.yahoo.com/group/ukmicrowaves/post;_ylc=X3oDMTJlcjA5NGx1BF9TAzk3MzU5NzE0BGdycElkAzgwOTAxMjEEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTM4MDU3NDIxNw--
[4] http://groups.yahoo.com/group/ukmicrowaves/message/33648;_ylc=X3oDMTM2ZmgzYmV2BF9TAzk3MzU5NzE0BGdycElkAzgwOTAxMjEEZ3Jwc3BJZAMxNzA1MDYzMTA4BG1zZ0lkAzMzNjQ4BHNlYwNmdHIEc2xrA3Z0cGMEc3RpbWUDMTM4MDU3NDIxNwR0cGNJZAMzMzY0OA--
[5] http://groups.yahoo.com/group/ukmicrowaves;_ylc=X3oDMTJldjc4dTNsBF9TAzk3MzU5NzE0BGdycElkAzgwOTAxMjEEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwN2dGwEc2xrA3ZnaHAEc3RpbWUDMTM4MDU3NDIxNw--
[6] http://groups.yahoo.com/;_ylc=X3oDMTJkOTZmZTNuBF9TAzk3NDc2NTkwBGdycElkAzgwOTAxMjEEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwNmdHIEc2xrA2dmcARzdGltZQMxMzgwNTc0MjE3
[7] mailto:ukmicrowaves-traditional@yahoogroups.com?subject=Change Delivery Format: Traditional
[8] mailto:ukmicrowaves-digest@yahoogroups.com?subject=Email Delivery: Digest
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Re: Power rating of SMA relays

Roger Blackwell GM4PMK
 

On 30/09/2013 21:50, tim.forrester@... wrote:

I have an assortment of SMA relays made by Radiall and Narda


The Radiall units are rated 0-3GHz and part number R570313000 and the Narda's are MS-SMA-020 FSCM99899

A old Radiall catalogue I have, although it doesn't have the R570 ... series in it, does however  give a general power handling guide for their SMA relays as follows:
0.2GHz 100 W; 1 GHz 70 W; 10GHz 30W; 20 W 18GHz.

73
--

Roger Blackwell  GM4PMK

www.marsport.org.uk