Date   

Re: Italian text - can anyone translate

Pete - GM4BYF
 

Neil reply offline of identity of Sheffield Cutlery plater please.

I may have a personal contact

73
Pete GM4BYF

On 19/02/20 14:02, Neil Smith G4DBN wrote:
I've seen this design before, but is it open-source?  Are there CAD drawings of it anywhere?

If I ever get to the end of my machining order book, I'll be making myself a miniature rotary four-port WR42 relay using two 90 degree curved guide segments with tellback contacts for a sequencer. I've been talking to a cutlery plating outfit in Sheffield that can do heavy silver plating for electrical devices at what appear to be reasonable prices.

Neil G4DBN

On 19/02/2020 13:44, Paul G8KFW wrote:
Hi
With an isolation of 60 dB and an insertion loss of 0.2 dB
This appears to be an exhalent switch
Is any one making this switch or the parts to sell on ?

Regards Paul   UK

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of
Dave Brown
Sent: 19 February 2020 09:13
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Italian text - can anyone translate

Interesting looking 24 GHz waveguide switch here-

www.i3opw.it/Releguida/disegno1.htm

  But it would be useful to be able to understand the text as I'm not 100 per
cent clear on its operation.
   So can anyone enlighten?
73
  Dave, ZL3FJ




--
vry 73
Pete GM4BYF


Re: Italian text - can anyone translate

DF6NA Rainer
 

Hi,

I3OPW was/is manufacturing and selling this switch. In 2008 he did ask € 150,- / piece.
Eisch was selling this also. It's not in the catalog anymore.

But there are also problems: the selenoid is moving a piece of teflon with a metal pin (waveguide/coax transition).
This teflon gets stuck quite frequently which is very bad when you have your transverter on the roof or on top of a tower !

73, Rainer

Am 19.02.2020 um 15:02 schrieb Neil Smith G4DBN:

I've seen this design before, but is it open-source?  Are there CAD drawings of it anywhere?

If I ever get to the end of my machining order book, I'll be making myself a miniature rotary four-port WR42 relay using two 90 degree curved guide segments with tellback contacts for a sequencer. I've been talking to a cutlery plating outfit in Sheffield that can do heavy silver plating for electrical devices at what appear to be reasonable prices.

Neil G4DBN

On 19/02/2020 13:44, Paul G8KFW wrote:
Hi
With an isolation of 60 dB and an insertion loss of 0.2 dB
This appears to be an exhalent switch
Is any one making this switch or the parts to sell on ?

Regards Paul   UK

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of
Dave Brown
Sent: 19 February 2020 09:13
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Italian text - can anyone translate

Interesting looking 24 GHz waveguide switch here-

www.i3opw.it/Releguida/disegno1.htm

  But it would be useful to be able to understand the text as I'm not 100 per
cent clear on its operation.
   So can anyone enlighten?
73
  Dave, ZL3FJ





Re: Italian text - can anyone translate

Neil Smith G4DBN
 

I've seen this design before, but is it open-source?  Are there CAD drawings of it anywhere?

If I ever get to the end of my machining order book, I'll be making myself a miniature rotary four-port WR42 relay using two 90 degree curved guide segments with tellback contacts for a sequencer. I've been talking to a cutlery plating outfit in Sheffield that can do heavy silver plating for electrical devices at what appear to be reasonable prices.

Neil G4DBN

On 19/02/2020 13:44, Paul G8KFW wrote:
Hi
With an isolation of 60 dB and an insertion loss of 0.2 dB
This appears to be an exhalent switch
Is any one making this switch or the parts to sell on ?

Regards Paul UK

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of
Dave Brown
Sent: 19 February 2020 09:13
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Italian text - can anyone translate

Interesting looking 24 GHz waveguide switch here-

www.i3opw.it/Releguida/disegno1.htm

But it would be useful to be able to understand the text as I'm not 100 per
cent clear on its operation.
So can anyone enlighten?
73
Dave, ZL3FJ





Re: Italian text - can anyone translate

Paul G8KFW
 

Hi
With an isolation of 60 dB and an insertion loss of 0.2 dB
This appears to be an exhalent switch
Is any one making this switch or the parts to sell on ?

Regards Paul UK

-----Original Message-----
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of
Dave Brown
Sent: 19 February 2020 09:13
To: UKMicrowaves@groups.io
Subject: [UKMicrowaves] Italian text - can anyone translate

Interesting looking 24 GHz waveguide switch here-

www.i3opw.it/Releguida/disegno1.htm

But it would be useful to be able to understand the text as I'm not 100 per
cent clear on its operation.
So can anyone enlighten?
73
Dave, ZL3FJ





--
Paul Bicknell G8KFW   South Coast UK


Re: 23cms

Neil Smith G4DBN
 

Late last night on 10GHz, I couldn't hear GB3CAM and there wasn't even any aircraft scatter or a sniff of tropo from good old KBQ, although I heard LEX off a storm over Staffordshire, and I was quite loud on the Mow Cop WebSDR.  Even with a 30 second FFT integration, I couldn't see anything from CSB or PKT.  Nothing at all from EU, not even Helgoland. Pretty grim.

Compare and contrast with 160m. I've heard 87 DXCC entities in the last four weeks on 160, from all continents except Antarctica, including Alaska, Uruguay, Argentina, Chile, most of the Caribbean, China, India and South Africa, and 50 or more JAs, using a 100mm G4HUP e-field active antenna.

In the ARRL DX CW contest last weekend, I worked nine US/VE stations using FIVE watts on 160m to a small, rubbish antenna*.

After blowing up the three-phase 440V inverter ( or "4 to 16kHz 3kW transmitter") which powers my machine shop, all is repaired now and I'm catching up gradually with the huge backlog of machining jobs, so no time to play on the radio.  Hope to get the new 23/13/9cm masthead box finished once the backlog is clear, but not in time for next Tuesday.  Ditto with 6cm.  I need to retire.

Neil G4DBN

* 130ft of wire draped over a tree as an inverted U at about 35ft, fed with 75 ohm TV coax, strapped inner and outer, using a 30ft pole with a 2m beam on top as an "earth" counterpoise. 

On 19/02/2020 12:00, G3UVR Denis via Groups.Io wrote:
Hi Ben.

52 stations in my log last night spent lots of time beaming your way calling many CQs.

Conditions were very poor and not that many portable stations on I would normally have worked ten more.

Loved top band fifty years ago when the band was noise free. Now its impossible with so much RF pollution.

Maybe I can get you in my log on 13cm next week.

73 de Denis G3UVR
-- 
Neil
<a href="http://g4dbn.uk/"><small>g4dbn.uk</small></a>


Re: 23cms

G3UVR Denis IO83KH
 

Hi Ben.

52 stations in my log last night spent lots of time beaming your way calling many CQs.

Conditions were very poor and not that many portable stations on I would normally have worked ten more.

Loved top band fifty years ago when the band was noise free. Now its impossible with so much RF pollution.

Maybe I can get you in my log on 13cm next week.

73 de Denis G3UVR


Re: Italian text - can anyone translate

Andy G4JNT
 

Can't translate the text , but I have one of them - purchased at a round table.   It's a changeover function with the common port being  the vertical part of the T configuration of waveguides.  The three waveguides are stacked with their broad faces touching and the common port in  the middle. A hole is drilled though all three waveguides so that the shorted rear of all three is a [quarter wave] behind the hole in each case.

A half wave resonant probe is introduced  so that is one position it lies with equal penetration into [say] the lower guide and the common middle one. So we have coupling between those two.  Think of it as a WG to coax transition then back again, except the coax is a half-wave resonant length.   When the relay pulls in, the probe moves to a position between top and centre guides now coupling those two.

Although mine does appear to work, I'm reluctant to use it with an exotic / expensive 2W PA with no test equipment able to measure loss / match etc.  Also, it failed at one point.   I made the mistake of fixing things so the soldered faces of the waveguides were under stress and the joint broke.  Having to dismantle and repair the switch made me realise how critical all the distances and stops and things were, so it's not my favourite RF switch.  However, in the absence of any proper WG20 switch... 



On Wed, 19 Feb 2020 at 09:13, Dave Brown <2c39a@...> wrote:
Interesting looking 24 GHz waveguide switch here-

www.i3opw.it/Releguida/disegno1.htm

 But it would be useful to be able to understand the text as I'm not 100 per
cent clear on its operation.
  So can anyone enlighten?
73
 Dave, ZL3FJ






Re: A new world record on 122

Murray Niman
 


Excellent!

Not bad for a milliwatt and a huge amount of path loss

73

 Murray G6JYB


Re: 23cms

Martyn G3UKV
 

HI !
Not quite the same as Top Band - I had 18 QSOs, but nearly all needed 'winkling out'.
73 Ben
Martyn G3UKV

On 18/02/2020 21:57, militaryoperator via Groups.Io wrote:
Well that was a waste of time. 

I heard and worked only 1 station, 45 mile away, later giving a serial of 65  etc. 

CQ Top Band ?? !!!!!!

Ben




Italian text - can anyone translate

Dave Brown
 

Interesting looking 24 GHz waveguide switch here-

www.i3opw.it/Releguida/disegno1.htm

But it would be useful to be able to understand the text as I'm not 100 per
cent clear on its operation.
So can anyone enlighten?
73
Dave, ZL3FJ


Re: 23cms

militaryoperator
 

Condx were very poor, lots people I can usually work were unworkable.
Lots of tests failed & regular strong signal stations were marginal.
5 QSOs of which 4 were marginal & 3 were CW.
Top band? NOYN Pull yourself together man!
--
Clive GW4MBS (ex-G8ADP)
----------------------------------------------------

Yes Clive. I normally hear many though can't work them yet but last night was really poor. 

Hey ho as they say.  Roll on next month. 

Ben G4BXD


A new world record on 122

Tim, VK2XAX
 

Hi all,

A brilliant achievement by Mike and Oliver, it just shows what you can do with these Silicon Radar chips :)

cheers

Tim
-------- Forwarded Message --------
Subject: [The122GProject] A new world record on 122
Date: Tue, 18 Feb 2020 10:40:25 -0800
From: Mike Lavelle K6ML <miclevel@...>
Reply-To: The122GProject@groups.io
To: The122GProject@groups.io


17 Feb 2020

 

139 km on 122 GHz (a new world record for this band) QSOs between

 

Mike, K6ML, on Mt Vaca (CM88WJ75ON, 835m ASL)

 

and

 

Oliver, KB6BA, (at 1225) & Jim, N9JIM, (at 1250), both on Mt Umunhum (CM97BD18VJ, 1016m ASL)

 

WX:  Dew Point -11C, Air Temp +15C, path loss ~ 225 dB, atmospheric loss ~0.35 dB/km

 

CW was used, 122 GHz signals were very weak (7 dB above the noise in 22 Hz; -13 in 2500 Hz equivalent) with QSB down to the noise floor.   Dishes were aligned on 24 GHz (71 dB above the noise) prior to QSY to 122 GHz; we heard signals right away on 122 GHz.   

 

We used dual band radios designed by Mike (using 122 and 24 GHz Silicon Radar sensor chips and 60 cm satellite TV dishes) with somewhat less than half a milliwatt of output power on 122 GHz.  Mike & Oliver focused and aligned the radios in previous field tests from 15 to 80 km.  Jim suggested the 139 km path from Mt Umunhum (“the resting place of the hummingbird” in the Ohlone language) to Mt Vaca (“cow” in Spanish) and also taught us the weak signal EME CW exchange technique. 

 

 


Re: 23cms

Clive Elliott GW4MBS
 

Condx were very poor, lots people I can usually work were unworkable.

Lots of tests failed & regular strong signal stations were marginal.

5 QSOs of which 4 were marginal & 3 were CW.

Top band? NOYN Pull yourself together man!
--
Clive GW4MBS (ex-G8ADP)
Pottering on 6m/4m/2m/70cm/23cm in a valley in IO71XW where any QSO is a triumph of optimism over geography!


23cms

militaryoperator
 

Well that was a waste of time. 

I heard and worked only 1 station, 45 mile away, later giving a serial of 65  etc. 

CQ Top Band ?? !!!!!!

Ben



23cms?

militaryoperator
 

Anyone on this evening???

Ben G4BXD



Re: Waterproof multipole connectors

alwyn.seeds1
 

Dear Conrad,

The Teuchels are screened.

Regards,

Alwyn
_____________________________________________________

Alwyn Seeds, Director
114 Beaufort Street (Management) Company Ltd.,
114 Beaufort Street,
London,
SW3 6BU

114 Beaufort Street (Management) Company Ltd., Registered in England and Wales: No. 02797775 Registered Office Address: 114 Beaufort Street, London, SW3 6BU
______________________________________________________


Re: GB3RPE

Adrian G4UVZ
 

For what it is worth ...when RPE was on Swansea Uni I cooud receive it 90% of the time at IO80KX51  5 M S of Taunton  ..predicted pathloss 209dB.  Single obstrucion at Willet Hill Somerset

The Camarthan QTH ..if I have it correct at IO71UU06 comes out at 229dB loss almost identical beam heading, with Willet Hill as the first obstruction but multiple obstructions on the GW.

I suspect that under rainscatter conditions that the beacon will appear but under flat conditions it will be silent on the 140 degree heading.

As a further comparison CCX which was a similar distance and path ..except that the beacon was high on a hill used to appear here under flat conditions about 3% of the time...path loss 219dB 

The proof of the pudding will be when the beacon comes on line!

Adrian


Re: 'LOCATE' on iPhone

Denis Stanton G0OLX
 

Andy
Thanks for that
It got my database working.
Would have been a bit of a panic on first contest outing !!!!!
Many thanks 
Denis
G0OLX


On 18 Feb 2020, at 15:15, Andy G4JNT <andy.g4jnt@...> wrote:


When I tried to use Colin, G4EML's LOCATE prog on my iPhone 7, accessing the site database would no longer work and it threw up error messages.

Contracted Colin, who said that SQLite was no longer supported on IOS13 (I had upgraded the operating system a few weeks ago)

A bit of Googling found a solution at :
In summary :
Settings - Safari - Advanced - Experimental Features -  Disable Web SQL off (very last item in  the menu)

'LOCATE' database access now appears to work


'LOCATE' on iPhone

Andy G4JNT
 

When I tried to use Colin, G4EML's LOCATE prog on my iPhone 7, accessing the site database would no longer work and it threw up error messages.

Contracted Colin, who said that SQLite was no longer supported on IOS13 (I had upgraded the operating system a few weeks ago)

A bit of Googling found a solution at :
In summary :
Settings - Safari - Advanced - Experimental Features -  Disable Web SQL off (very last item in  the menu)

'LOCATE' database access now appears to work


Re: Waterproof multipole connectors

Julian - M0UGA
 
Edited

Hi Conrad,

These specific Bulgin connectors seem to fit the bill, available in 2/3/8/16 & 22 pole, metal bodied & waterproof.

Note the bullet point regarding cable braid termination being available.

They are very configurable but as noted before the bill could soon add up.

73