Date   

Re: ADL5350 Module Low Frequency 10Mhz-4GHz high-linearity Mixer RF / IF / LO Port

Andy G4JNT
 

The MIcrowave components service has an active mixer, same topology as the ADL5350 - it was used for a 2.4GHz upconverter for QO-100.   Not sure if it goes to 4GHz though.   



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On Mon, 30 Nov 2020 at 19:42, Adrian G4UVZ via groups.io <adrianwhatmore248=btinternet.com@groups.io> wrote:
A friend has just received, after 2 months wait,  a faulty mixer from Ebay. Before he re-orders does anyone have a surplus working mixer?

Adrian


ADL5350 Module Low Frequency 10Mhz-4GHz high-linearity Mixer RF / IF / LO Port

Adrian G4UVZ
 

A friend has just received, after 2 months wait,  a faulty mixer from Ebay. Before he re-orders does anyone have a surplus working mixer?

Adrian


Re: Equipment disposal

Paul G8KFW
 

Hi Martine 

 

I did send you an email expressing my interest in the scalier and detectors  but unfortunately no reply

 

Regards Paul

 


From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of g3zqu via groups.io
Sent: 30 November 2020 14:12
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Equipment disposal

 

The HP sweeper has been relocated so is no longer available.
Martin g3zqu

No virus found in this message.
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Paul Bicknell G8KFW   South Coast UK


Re: Equipment disposal

g3zqu
 

The HP sweeper has been relocated so is no longer available.
Martin g3zqu


Re: Transport from Suffolk to Hants

Julian, G3YGF
 

Ok, thanks, that sounds like a good idea...
 
Julian, G3YGF
 

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io]On Behalf Of Robin Szemeti - G1YFG
Sent: 30 November 2020 08:36
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Transport from Suffolk to Hants

If, for whatever reason, you do not find anyone, can I recommend "anyvan.com"?  

I've used their booking service several times now and alway with good result.  The item is collected by a chap/chappess in his/her van  who is making a journey in roughly your direction, and is delivered and offloaded from the same van, without being unloaded or "sorted" onto another van in between.   The item does not need to be boxed, but you probably want to protect the sensitive bits on the front.

On Sun, 29 Nov 2020 at 22:28, Julian, G3YGF <julian@...> wrote:
I am looking to transport a heavy  HP siggen (almost 2 man lift) from Mid Suffolk to Hants.
It will go on the back seat of a car ok...
 
Is anyone going that route in the next month or so, perhaps over xmas?
 
Julian, G3YGF


--
Robin Szemeti - G1YFG


Re: Daico SMA switch ?

Alan
 

Some of DAICO’s more recent reed switches are changeover reeds that switch  50 ohm internal resistors to the inputs when not selected, worth doing a check to see if the connectors 1-4 read 50 ohms with no power.  These kinds of switch have the obvious detail that they are relatively LF/dc  and switch in mS rather than microseconds.

 

Andy,  glad that you read the reed .

 

73

Alan

G8LCO

 

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Re: Daico SMA switch ?

Stephen McAdam <stephen.mcadam56@...>
 

Hi 
There is a data sheet for a similar part, 100C0613, which has a schematic showing the pin connections and Reed relays with diodes.
It might be worth using a multimeter and check if they match before applying power, just to see if they match.

http://www.daico.com/Daico_SP4T_PDFs/100C0613.pdf

Regards
Steve, g4vbd


Re: Daico SMA switch ?

Paul Evans W4/VP9KF
 

Yes, reed. You can see by the timing quoted. Daico moved on to PIN and GaAs switches, making this obsolete.
Interesting that the one shown here is only 6 serial numbers away from the one on eBay.
Very expensive from Surplus Sales!
Carries 'Common' P/N, so equivalents will exist for multiple sources.
Maybe be worth seeing if it will pull in (albeit slowly) with 12 VDC. Probably will.
--
73, Paul Evans G4BKI [VP9KF]


Re: Daico SMA switch ?

Andy G4JNT
 

OOps, didn't see the word 'reed'.
Nice slimline switch.



On Mon, 30 Nov 2020 at 09:58, Alan <g8lco1@...> wrote:

That is probably a  reed switch not a diode or a GaAs IC switch from the part number and the “REED” marking. The later models have internal back EMF diodes across the reed coils so don’t connect the supply backwards without current limiting. Daico make models with a range of voltages but the stamped in 24 might be a clue........

 

The switching is likely to be very simple, powering any channel connects it to the common connector.

 

73

Alan

G8LCO

 

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Re: Daico SMA switch ?

Bob_G1ZJP
 

Morning Stuart

 

This is from Ebay, so may/not be true but have a look here-

SP4T REED RF SWITCH SMA 24V PN 100C0259 of DAICO INDUSTRIES | eBay

 

73

Bob, G1ZJP

 

 

 

From: Alan
Sent: 30 November 2020 09:58
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Daico SMA switch ?

 

That is probably a  reed switch not a diode or a GaAs IC switch from the part number and the “REED” marking. The later models have internal back EMF diodes across the reed coils so don’t connect the supply backwards without current limiting. Daico make models with a range of voltages but the stamped in 24 might be a clue........

 

The switching is likely to be very simple, powering any channel connects it to the common connector.

 

73

Alan

G8LCO

 

Sent from Mail for Windows 10

 

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Re: Daico SMA switch ?

Alan
 

That is probably a  reed switch not a diode or a GaAs IC switch from the part number and the “REED” marking. The later models have internal back EMF diodes across the reed coils so don’t connect the supply backwards without current limiting. Daico make models with a range of voltages but the stamped in 24 might be a clue........

 

The switching is likely to be very simple, powering any channel connects it to the common connector.

 

73

Alan

G8LCO

 

Sent from Mail for Windows 10

 

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_._,_._,_

 


Re: Daico SMA switch ?

Andy G4JNT
 

I suspect PIN diodes rather than reeds, so don't apply a "voltage", but a voltage through a resistor to limit it to a few mA.   Measure what you get.  Does it behave like a diode, or a resistance?
Once you've made a reasonable assertion over what the switching element might be, try powering up one line and measure RF loss to the appropriate port.   
Follow on from there...




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On Mon, 30 Nov 2020 at 08:26, Robin Szemeti - G1YFG <robin@...> wrote:
Just apply voltage to pins 1, 2 3  or 4  to select 1, 2, 3 or 4 ... I suspect each one activates a read switch or similar ... with no voltage applied, I suspect none are connected ... I suspect if you applied voltage to more than one pin, more than one output would be connected ...


On Mon, 30 Nov 2020 at 08:02, Stuart G1ZAR <stuart.tyler@...> wrote:
Hi all, I am looking for information on the Diaco switch pictured, and an explanation of its operation.
Can you select only 1 output, or can the input be connected to multiple outputs, depending on which pins the voltage is applied?



thank you.
Stuart
G1ZAR


--
Robin Szemeti - G1YFG


Re: Transport from Suffolk to Hants

Robin Szemeti - G1YFG
 

If, for whatever reason, you do not find anyone, can I recommend "anyvan.com"?  

I've used their booking service several times now and alway with good result.  The item is collected by a chap/chappess in his/her van  who is making a journey in roughly your direction, and is delivered and offloaded from the same van, without being unloaded or "sorted" onto another van in between.   The item does not need to be boxed, but you probably want to protect the sensitive bits on the front.

On Sun, 29 Nov 2020 at 22:28, Julian, G3YGF <julian@...> wrote:
I am looking to transport a heavy  HP siggen (almost 2 man lift) from Mid Suffolk to Hants.
It will go on the back seat of a car ok...
 
Is anyone going that route in the next month or so, perhaps over xmas?
 
Julian, G3YGF


--
Robin Szemeti - G1YFG


Re: Daico SMA switch ?

Robin Szemeti - G1YFG
 

Just apply voltage to pins 1, 2 3  or 4  to select 1, 2, 3 or 4 ... I suspect each one activates a read switch or similar ... with no voltage applied, I suspect none are connected ... I suspect if you applied voltage to more than one pin, more than one output would be connected ...


On Mon, 30 Nov 2020 at 08:02, Stuart G1ZAR <stuart.tyler@...> wrote:
Hi all, I am looking for information on the Diaco switch pictured, and an explanation of its operation.
Can you select only 1 output, or can the input be connected to multiple outputs, depending on which pins the voltage is applied?



thank you.
Stuart
G1ZAR


--
Robin Szemeti - G1YFG


Daico SMA switch ?

Stuart G1ZAR
 

Hi all, I am looking for information on the Diaco switch pictured, and an explanation of its operation.
Can you select only 1 output, or can the input be connected to multiple outputs, depending on which pins the voltage is applied?



thank you.
Stuart
G1ZAR


Re: Programming 13Ghz Signal generator

Mike GD6ICR
 

Methinks that an RFZERO is the best route then - and worthwhile by the looks of it so I can program it whatever mode it is best for the band im transmitting on
Thanks for all the input I'll use it alll to go forward - and cheap at the price.
--
Mike GD6ICR IO74PF73TW


Re: 9 & 3 the other night

Neil Smith G4DBN
 

Hi John, on a 600 km path, with a plane travelling at 900 km/hr (250 m/sec), which in the worst case of the course being at a 90 degree angle to the line of sight at the 300 km mid-point, the angle relative to the line of sight is changing at a rate of 250/300000 radians per second, or about 0.05 degrees per second.  It is worse when the plane is nearer to one end, or when the path is shorter. If each end has a dish with a 2 degree beamwidth at -3 dB, you actually get -6 dB at that angle as both antennas are now at their 3 dB points.

Assuming the peak reflection is at 15 dB above noise, and a 6 dB drop is enough to make copy too hard, that gives a theoretical time in the reflection zone of 40 seconds betgween -6 dB points if the limit is the antenna beamwidth.

Most of the reflections I see with a plane at right angles to the path are from beacons, which are usually omni, so I should get an even longer time before the signal drops 6 dB.  That is absolutely NOT what I see though.  The reflections are brief, maybe 6 to 8 seconds.  That may be because I am seeing specular reflections which are very narrow. When a plane is flying exactly along the line of sight, the reflections are certainly longer, but still not as long as you would hope, despite the plane being solidly in both antenna beams for an extended period..

This assumes that the antennas each end illuminate the plane roughly in the centre of their main lobe, and at shorter ranges without elevation, that may not be the case, but at 500 km, the angles even to high planes are pretty much at the horizon.

I've tracked planes flying into East Midlands by watching the reflections from GB3FNY, there the angle between me and the plane and FNY is < 20 degrees, and I can certainly track the planes in altitude and azimuth for a minute or more.  I haven't managed to do that with forward scatter from LEX or KBQ though.

Upshot is that I don't think you need to worry about having a sharp dish, as other factors are the limit rather than your antenna beamwidth, certainly for oblique paths over more than 400 km.

When the V22 Ospreys fly over, I sometimes track them and I can hear the very rapid doppler buzz from those giant props using the FNY reflection.  Same with a Chinook.  I don't feel brave enough to try transmitting at them on 10 GHz though, that might have Consequences. The big USAF transports which sometimes fly fairly low across North Yorks and Cumbria are excellent for hearing the GM beacons.

If you fancy trying some (non-military) plane-tracking for 3cm off-axis scatter some time, it is good fun. Or at least is WAS, when there used to be planes...

Neil G4DBN


On 29/11/2020 21:38, John Lemay wrote:

Thanks Kjeld, your explanation makes a lot of sense.

 

Perhaps my idea of using a 1m dish on 10GHz, to get lots of gain, has come back to bite me !

 

Regards

 

John G4ZTR



Transport from Suffolk to Hants

Julian, G3YGF
 

I am looking to transport a heavy  HP siggen (almost 2 man lift) from Mid Suffolk to Hants.
It will go on the back seat of a car ok...
 
Is anyone going that route in the next month or so, perhaps over xmas?
 
Julian, G3YGF


Re: 9 & 3 the other night

John Lemay
 

Thanks Kjeld, your explanation makes a lot of sense.

 

Perhaps my idea of using a 1m dish on 10GHz, to get lots of gain, has come back to bite me !

 

Regards

 

John G4ZTR

 

From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Kjeld, OZ1FF
Sent: 29 November 2020 10:44
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 9 & 3 the other night

 

Hi John

The reason for the much shorter reflection time on 10 GHz is the smaller opening angle of the antenna. I have made a lot of 10 GHz QSOs with DL6NAA over 650 km. If the aircraft is on the path one AC is mostly sufficient. If AC crosses the path up to 5 ACs can be needed to complete a QSO. It is like working ES on 144 MHz.

Good tools for monitoring ACs is AirScout/ and/or the Tucnak logprogram.




The triangles are ACs. Pointing on the AC shows data in the upper right corner. The yellow box is the Fressnell zone to SM1HOW showing a suitable AC for an easy QSO.

Vy 73 de OZ1FF, Kjeld
CU on AR.


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Another dish

militaryoperator
 

Just found myself another 1.1Mtr offset dish locally. 

I Will have to see if I can get it on the tripod, once I build the top housing, the big nut has arrived so hope to sink that into a wood boss then attach the lazy susan etc, and make it rotatable. I Will need to try and add a bit of tilt as well I guess to get the best results.

Plenty to do, hi. Who can be bored in lockdown?

Ben



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