Date   

Fw: Bird power sensors.

GM6VXB
 

----- Original Message -----
Sent: Thursday, May 05, 2011 7:55 AM
Subject: Re: [ukmicrowaves] Bird power sensors.

Tony,
Got some information from internet but I cannot find the original site now.
If you E-mail me at 'mycall'@btinternet.com I will send you information I have
 
Martin,
GM6VXB
 
----- Original Message -----
From: willcroft
Sent: Thursday, May 05, 2011 7:44 AM
Subject: [ukmicrowaves] Bird power sensors.

 

Not microwave but does anyone have info on Bird Thruline power sensors 4C250, 4C1000, 4D100 and 4D500?
I was looking for wiring/mechanical/calibration construction details.
If I take the four screws out the top doesn't seem to come off?
So, before I pull harder, I was hoping to see if I'm missing something. :-)

I'm not sure if there are calibration resistors.
A response curve would be nice then I could re-calibrate a 4C250 on to 70MHz.

Cheers

Tony


Re: Bird power sensors.

GM6VXB
 

Tony,
Got some information from internet but I cannot find the original site now.
If you E-mail me at 'mycall'@btinternet.com I will send you information I have
 
Martin,
GM6VXB
 

----- Original Message -----
From: willcroft
Sent: Thursday, May 05, 2011 7:44 AM
Subject: [ukmicrowaves] Bird power sensors.

 

Not microwave but does anyone have info on Bird Thruline power sensors 4C250, 4C1000, 4D100 and 4D500?
I was looking for wiring/mechanical/calibration construction details.
If I take the four screws out the top doesn't seem to come off?
So, before I pull harder, I was hoping to see if I'm missing something. :-)

I'm not sure if there are calibration resistors.
A response curve would be nice then I could re-calibrate a 4C250 on to 70MHz.

Cheers

Tony


Bird power sensors.

Tony Pugh GW8ASD
 

Not microwave but does anyone have info on Bird Thruline power sensors 4C250, 4C1000, 4D100 and 4D500?
I was looking for wiring/mechanical/calibration construction details.
If I take the four screws out the top doesn't seem to come off?
So, before I pull harder, I was hoping to see if I'm missing something. :-)

I'm not sure if there are calibration resistors.
A response curve would be nice then I could re-calibrate a 4C250 on to 70MHz.

Cheers

Tony


Re: 432MHz and up

Martyn G3UKV
 

Telford & DARS  will be active this weekend.
Callsign: G3Z
Location: IO82QL (Brown Clee, Shrops.)
Bands: All bands 70cm to 24 GHz
Times: 1400-1400 with night time break.

73  Martyn G3UKV

On 04/05/2011 21:58, Robert Price wrote:
 
Bolton Wireless Club will be out on Winter Hill with several stations.

Callsign: G0BWC/P
Locator: IO83RO
Bands: 23cm 8W Loop Yagi
             13cm 50mW Yagi
              9cm 1mW FM Flat Panel arrays
Times: Daytime only various

Callsign: G8DTF/P
Locator: IO83RO
Bands:      13cm 10W, 62 ele yagi
                    9cm 9W, 80cm dish
                    3cm 3W, 80cm dish
Times: Daytime only various

It is also likely that will have 24GHz and 432MHz.

I had a bit of success getting my Ionica amplifier going tonight for 9cm, so contacts beyond 60Km should now be possible.


73

Bob
G8DTF










432MHz and up

Robert Price <g8dtf@...>
 

Bolton Wireless Club will be out on Winter Hill with several stations.

Callsign: G0BWC/P
Locator: IO83RO
Bands: 23cm 8W Loop Yagi
             13cm 50mW Yagi
              9cm 1mW FM Flat Panel arrays
Times: Daytime only various

Callsign: G8DTF/P
Locator: IO83RO
Bands:      13cm 10W, 62 ele yagi
                    9cm 9W, 80cm dish
                    3cm 3W, 80cm dish
Times: Daytime only various

It is also likely that will have 24GHz and 432MHz.

I had a bit of success getting my Ionica amplifier going tonight for 9cm, so contacts beyond 60Km should now be possible.


73

Bob
G8DTF










Re: Bird Termaline and the supply of Refined Mineral Oil

Grant Hodgson <grant@...>
 

I'd tend to agree with Simon, BUT - be aware that the Bird oil-filled loads
rely on the dielectric properties of the oil for their electrical performance
- i.e. their low SWR/good return loss. The resistive element is in direct
contact with the oil, so the impedance is a function of the oil.

If you don't use the oil specified, then the SWR may not be as good as
originally stated by Bird.

It's also worth noting that the oil can go 'off' just like old car engine oil
- it's life is a function of the total energy applied to the load - so lightly
driving the load for short periods of time will result in a very long oil
life. Running 1kW (or more) continuously into the load will result in the oil
changing colour & dielectric constant and therefore the SWR of the load. So
better not leave that 1kW 1.3GHz PA connected for too long eh?

Does it matter for amateur radio use? Probably not, but it's something to be
aware of.

regards

Grant G8UBN

On Wed, 04 May 2011 08:04:20 -0000, Simon L wrote
Clive

Use synthetic transmission oil

its v light oil you would put in the auto transmission gear box.

My old bird thermaline does ok on it :)

Its high temp rated and light synthetic oil so perfect for the job

Should be able to get that any branch of halfords etc

cheers

Simon ZL4PLM

--- In ukmicrowaves@yahoogroups.com, Geoff Blake <geoff@...> wrote:

Clive,
Have you tried Aspen Electronics, Harrow? Maybe they will sell you a
litre or so.

Geoff G8GNZ

On 3 May 2011 18:52, Clive <clivejenner@...> wrote:
Hi I have discovered that my Bird Termaline Dummy Load is low on oil for
it's cooling. I have been doing some search and all I can find is that I need
Refined Mineral Oil and apart from a company that sells it be the Gallon I am
stuck. I probable only need a couple of pints! Has anyone had the same problem
and located a suitable supply? Would motor oil do and if so what grade? Thanks
for any help and 73 Clive GW0PPO



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

Yahoo! Groups Links




Re: 10GHz Trophy

James Wakenell <jim@...>
 

G3ZME will be out this weekend  10 and 24 G plus 70cm I think

Jim G8UGL




========================================
Message Received: May 03 2011, 06:02 PM
From: "Martin Platt"
To: ukmicrowaves@...
Cc: "g3cwi"
Subject: Re: [ukmicrowaves] 10GHz Trophy

 

GD0EMG will be QRV all bands at least to 24Ghz (maybe higher if there are others interested)

Martin Platt G4XUM 

On 03/05/2011 17:59, g3cwi wrote:
 

Anyone be out this weekend?

73

Richard
G3CWI




=


Re: Bird Termaline and the supply of Refined Mineral Oil

Clive Jenner <clivejenner@...>
 

Hi and thanks to Geoff and Simon for the advice on oil for Bird Termaline loads.

At Geoff's suggestion I got a quote from Aspen and in case any one is interested I have included the details below. They are willing to supply suitable quantities. If any one requires Aspen (Bird's UK agent) details then please contact me directly. Or easier still check this URL

http://www.aspen-electronics.com/default.asp

The prices for the 2 different types of coolants are stated below.Please note the differences are that below 1000W the units use mineral 10C coolant and above 1000W the

units use silicon DC-200 we would be happy to supply you either these products in what ever amounts you require.

Mineral.

1.5-030-1 1pt 22.00
2.5-030-2 1/2 Gal 36.12
3.5-030-3 1 Gal 59.13
4.5-030-4 5 Gal 295.62

Silicon.

1.5-1070-1 1pt 23.75
2.5-1070-2 1 Gal 137.94
3.5-1070-3 5 Gal 542.06
It's interesting that at the higher power level Aspen recommend a silicon oil.

My unit is rated at 1 KW and therefore needs the Silicone oil. It's capacity is 0.75 of a gallon so I suspect it would cost close to150 by the time shipping and VAT are taken into consideration.
I suspect that Simon's idea will hold sway at this end.

Halford's here I come!

73 Clive GW0PPO


Re: Bird Termaline and the supply of Refined Mineral Oil

dbztuzujdhgtrjzthxh
 

Hi Clive,
a cheap source of light mineral oil is from an equine supply place. It's used as a laxative for horses (search for "Liquid Paraffin BP Laxative").
73
ian

--- In ukmicrowaves@yahoogroups.com, "Clive" <clivejenner@...> wrote:

Hi I have discovered that my Bird Termaline Dummy Load is low on oil for it's cooling. I have been doing some search and all I can find is that I need Refined Mineral Oil and apart from a company that sells it be the Gallon I am stuck. I probable only need a couple of pints! Has anyone had the same problem and located a suitable supply? Would motor oil do and if so what grade? Thanks for any help and 73 Clive GW0PPO


Re: RSGB UHF/Microwave Contests This Weekend

Ian White
 

This is also the moment to remind GMs that there will be a microwave get-together at the Magnum Rally (Irvine) on Sunday.

In 'The Ship' (straight across the road) at 12:00.

It's a shame about the clash with the contest, but Magnum is also one of our very few chances to get together. Hopefully a good number of us can fit in both events.

We also need to be thinking forward to the first GM Round Table on 6th November.


--

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek


Re: RSGB UHF/Microwave Contests This Weekend

Brian Flynn GM8BJF
 

We will be out this weekend hopefully with all bands from 432 to 24GHz in IO74WV near Gatehouse-of-Fleet in SW Scotland. Calls will be GM3HAM/P
on the lower bands, GM4BYF/P on 13, 9 and 6cm and GM8BJF/P on 10G and 24G. travelling from Edinburgh on Friday evening setting up Sat AM. WX forecast is looking a bit threatening!

73s

Brian,
GM8BJF.


10GHz Trophy activity

davidjausten <david.austen@...>
 

Barry, G4SJH and myself are intending to dust-off the old 10GHz gear and give it an airing on Saturday. So we should have two set-ups running from Coombe Gibbett IO91GI, with 1W, ~1.5dB NF and 60cms dishes. Also hope to have 2m talk-back and KST.

Hope to work a few of you ...

Dave, G1EHF


Re: Bird Termaline and the supply of Refined Mineral Oil

Simon L <gm4plm@...>
 

Clive

Use synthetic transmission oil

its v light oil you would put in the auto transmission gear box.

My old bird thermaline does ok on it :)

Its high temp rated and light synthetic oil so perfect for the job

Should be able to get that any branch of halfords etc

cheers

Simon ZL4PLM

--- In ukmicrowaves@yahoogroups.com, Geoff Blake <geoff@...> wrote:

Clive,
Have you tried Aspen Electronics, Harrow? Maybe they will sell you a
litre or so.

Geoff G8GNZ

On 3 May 2011 18:52, Clive <clivejenner@...> wrote:
Hi I have discovered that my Bird Termaline Dummy Load is low on oil for it's cooling. I have been doing some search and all I can find is that I need Refined Mineral Oil and apart from a company that sells it be the Gallon I am stuck. I probable only need a couple of pints! Has anyone had the same problem and located a suitable supply? Would motor oil do and if so what grade? Thanks for any help and 73 Clive GW0PPO



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

Yahoo! Groups Links




Re: GB3CSB Aircraft Scatter

F6DRO
 

Hi ,

tnx for the interesting link. In my opinion conclusions abt 10Ghz is a bit
pessimistic. What I can say is that AS skeds on 3cm with my friend F6DKW
in JN18CS from my QTH in JN03TJ are quasi 100% valid qso results. Same for
my friend F5BUU in JN03PO to Maurice. QRB is 600km. So 10Ghz AS is very
efficient.
I don't see any needs to use a PC and digital modes to do that. SSB or CW
with 15sec periods with BK works easier . And the pleasure is better .
Yes I know , I'm a dinosaure , but I like it ( Jagger/Stones paraphrasing)
I agree abt the scatter diagram of the airplane. Most of the time F5BUU
and me , 35km distant , cannot hear Maurice at the same time.

73
Dom/F6DRO


IARU Region 1 432MHz and Up Contest

Christopher Bartram <cbartram@...>
 

I plan to go out with 10GHz for a while, but I'm not sure when or where. It
could just be from my own land. I still have a number of minor practical
problems - particularly with mobile internet access - to resolve ...

Activity on 24 is also possible, although to do so I need to find time to make
some special waveguide flanges. If there is someone within range of IO71 who
wants to play, I'm sure I could find time, though ...

Vy 73

Chris
GW4DGU

10GHz portable: >8W, ~1dB NF, 80cm offset dish
24GHz portable: >2W, ~2.5dB NF, 80cm offset dish


Re: Bird Termaline and the supply of Refined Mineral Oil

Geoff Blake <geoff@...>
 

Clive,
Have you tried Aspen Electronics, Harrow? Maybe they will sell you a
litre or so.

Geoff G8GNZ

On 3 May 2011 18:52, Clive <clivejenner@orange.net> wrote:
Hi I have discovered that my Bird Termaline Dummy Load is low on oil for it's cooling. I have been doing some search and all I can find is that I need Refined Mineral Oil and apart from a company that sells it be the Gallon I am stuck. I probable only need a couple of pints! Has anyone had the same problem and located a suitable supply? Would motor oil do and if so what grade? Thanks for any help and 73 Clive GW0PPO



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

Yahoo! Groups Links




RSGB UHF/Microwave Contests This Weekend

Richard Cooper G4WFR <vhf@...>
 

RSGB UHF/Microwave Contests This Weekend.

This weekend there will be 3 x UHF/Microwave contests as below:

The 432MHz to 248GHz contest starts on 7th May at 1400 GMT & runs for 24 hours.
All bands from 432MHz to 248GHz
Single Operator Fixed (SF) or Open (O) sections
Exchange RS(T), S/N & Locator.
Full details at: http://bit.ly/jEQxJn

The 432MHz Trophy starts on 7th May at 1400 GMT & runs for 8 hours.
Single Operator Fixed (SF) or Open (O) sections
Exchange RS(T), S/N & Locator.
Full details at: http://bit.ly/iEG5is

The 10GHz Trophy starts on 7th May at 1400 GMT & runs for 8 hours.
Just one section ALL (A)
Exchange RS(T), S/N & Locator.
Full details at: http://bit.ly/lmxG3F

Logs can be uploaded on-line at: http://www.rsgbcc.org/cgi-bin/vhfenter.pl

Enjoy the contests & good luck to all taking part.
If you have any questions then please contact me at g4wfr@...

73,

Richard G4WFR
RSGB Contest Committee


Bird Termaline and the supply of Refined Mineral Oil

Clive <clivejenner@...>
 

Hi I have discovered that my Bird Termaline Dummy Load is low on oil for it's cooling. I have been doing some search and all I can find is that I need Refined Mineral Oil and apart from a company that sells it be the Gallon I am stuck. I probable only need a couple of pints! Has anyone had the same problem and located a suitable supply? Would motor oil do and if so what grade? Thanks for any help and 73 Clive GW0PPO


Re: 10GHz Trophy

Robert Price <g8dtf@...>
 

Hi Richard

I am planning to be out this weekend with other members of the Bolton Wireless Club on Winter Hill.

There will likely be several stations with various bands.

It it highly probable that we will have 70cm, 23cm, 13cm, 9cm, 3cm and 24GHz.

73

Bob
G8DTF


From: g3cwi
To: ukmicrowaves@...
Sent: Tuesday, 3 May 2011, 17:59
Subject: [ukmicrowaves] 10GHz Trophy

 
Anyone be out this weekend?

73

Richard
G3CWI




Re: 10GHz Trophy

Martin G4XUM
 

GD0EMG will be QRV all bands at least to 24Ghz (maybe higher if there are others interested)

Martin Platt
G4XUM

On 03/05/2011 17:59, g3cwi wrote:
 

Anyone be out this weekend?

73

Richard
G3CWI