Date   

Re: scope knobs?

militaryoperator
 

Yes, just 2 needed Dave. Let me know total with postage. 

B Nock
47 Oakfield Rd
Kidderminster
Worcs DY11 6PL


cheers


-----Original Message-----
From: dave cossar via Groups.Io <davecossar@...>
To: UKMicrowaves <UKMicrowaves@groups.io>
Sent: Thu, 20 Feb 2020 21:27
Subject: Re: [UKMicrowaves] scope knobs?

looks good then  is two enough?

On 20 February 2020 at 20:05 "militaryoperator via Groups.Io" <Military1944@...> wrote:

Hi Ben ,
I have found my Tec 465 got two red knobs  red marked VAR   for the Y input
is that what you wanted?

Dave GM3WIL


Colour and lettering immaterial Dave so long as they are tiny shaft, 3mm !! hi.


Ben
 


Re: scope knobs?

dave cossar
 

looks good then  is two enough?


On 20 February 2020 at 20:05 "militaryoperator via Groups.Io" <Military1944@...> wrote:

Hi Ben ,
I have found my Tec 465 got two red knobs  red marked VAR   for the Y input
is that what you wanted?

Dave GM3WIL


Colour and lettering immaterial Dave so long as they are tiny shaft, 3mm !! hi.


Ben
 


Re: scope knobs?

militaryoperator
 

Hi Ben ,
I have found my Tec 465 got two red knobs  red marked VAR   for the Y input
is that what you wanted?

Dave GM3WIL


Colour and lettering immaterial Dave so long as they are tiny shaft, 3mm !! hi.


Ben


Re: scope knobs?

dave cossar
 

Hi Ben ,

I have found my Tec 465 got two red knobs  red marked VAR   for the Y input

is that what you wanted?


Dave GM3WIL

On 17 February 2020 at 10:02 "militaryoperator via Groups.Io" <Military1944@...> wrote:

Looking for a couple of scope knobs, Tektronix etc. 

The inner of a two shaft type with the very tiny shaft, usually the fine adjustment knob on a control. 


Cheers, Ben. 


Re: Italian text - can anyone translate

Neil Smith G4DBN
 

I did wonder about a rack and pinion with a linear actuator of some sort, hadn't thought of a con-rod approach. Are linear solenoids with enough pull and stroke cheaper than motors these days though?  I did also consider a solenoid with a neodymium magnet on a curved armature. Gearmotor is just an easy off the shelf option.

Neil G4DBN

On 20/02/2020 12:20, PAUL NICKALLS via Groups.Io wrote:
Why not a linear solenoid and lever?
Paul G8AQA

On 20/02/2020 11:03, Neil Smith G4DBN wrote:
Rotary solenoids appear to be turning into unobtanium, at least at reasonable prices. I'm looking at either cheap steppers, robot/RC servos or really cheap gearmotors with current-limited drive. Aiming for 150ms to move 90 degrees including settling time, a motor geared for about 300rpm might do the job.  OK, it would be latching rather than failsafe, but with tellback contacts, that isn't a problem. Also reduces heating to near-zero. It would be a load of faff to make a rotary solenoid from scratch from iron laminations, even with access to a waterjet or laser CNC, when compared with the low cost of steppers and servomotors for 3D printers and robotics.

Neil G4DBN

On 20/02/2020 10:33, John Fell wrote:
Hi Denis,
No , just one of those jobs that needed doing .Some pics may show it .

The Rotary solenoid used was the 35mm RS Components 343-313 , which is 12V and shaft double ended , so I mounted an actuator  disc to set the travel limits .

It is spring return , which has adjustable rate , so forces can be tailored to suit the mechanical demand and confirmation sensors added as required to interface with the sequencing in use .

The original actuator mounting was simulated in Alum sheet ( 4 pillars) and that allows mounting of microswitches or whatever you use  and the travel limiter posts ( rubber sleeves on posts to take out the "clanks")  bolt through it.

To keep the overal height to minimum and provide a non-slip coupling between switch and new actuator , I slit the output shaft of the WG switch with a Junior hacksaw on centreline and inserted a 1mm thick Copper shim plate into a similar slit on the actuator shaft .When pushed together they form a solid link , which should last me , but allow removal as and when /if ever , needed.There is no detectable backlash .

The stainless steel "dome" was a handy "small Dog bowl" , silicone adhesive bonded to the Polycarbonate housing - the box existed and I am too tight to replace with a larger one that would have needed paying for ...... that gave me an extra 20mm height to play with .

Hope that helps .






-- 
Neil
<a href="http://g4dbn.uk/"><small>g4dbn.uk</small></a>


Re: Italian text - can anyone translate

PAUL NICKALLS
 

Why not a linear solenoid and lever?
Paul G8AQA

On 20/02/2020 11:03, Neil Smith G4DBN wrote:
Rotary solenoids appear to be turning into unobtanium, at least at reasonable prices. I'm looking at either cheap steppers, robot/RC servos or really cheap gearmotors with current-limited drive. Aiming for 150ms to move 90 degrees including settling time, a motor geared for about 300rpm might do the job.  OK, it would be latching rather than failsafe, but with tellback contacts, that isn't a problem. Also reduces heating to near-zero. It would be a load of faff to make a rotary solenoid from scratch from iron laminations, even with access to a waterjet or laser CNC, when compared with the low cost of steppers and servomotors for 3D printers and robotics.

Neil G4DBN

On 20/02/2020 10:33, John Fell wrote:
Hi Denis,
No , just one of those jobs that needed doing .Some pics may show it .

The Rotary solenoid used was the 35mm RS Components 343-313 , which is 12V and shaft double ended , so I mounted an actuator  disc to set the travel limits .

It is spring return , which has adjustable rate , so forces can be tailored to suit the mechanical demand and confirmation sensors added as required to interface with the sequencing in use .

The original actuator mounting was simulated in Alum sheet ( 4 pillars) and that allows mounting of microswitches or whatever you use  and the travel limiter posts ( rubber sleeves on posts to take out the "clanks")  bolt through it.

To keep the overal height to minimum and provide a non-slip coupling between switch and new actuator , I slit the output shaft of the WG switch with a Junior hacksaw on centreline and inserted a 1mm thick Copper shim plate into a similar slit on the actuator shaft .When pushed together they form a solid link , which should last me , but allow removal as and when /if ever , needed.There is no detectable backlash .

The stainless steel "dome" was a handy "small Dog bowl" , silicone adhesive bonded to the Polycarbonate housing - the box existed and I am too tight to replace with a larger one that would have needed paying for ...... that gave me an extra 20mm height to play with .

Hope that helps .







Re: Italian text - can anyone translate

Neil Smith G4DBN
 

Rotary solenoids appear to be turning into unobtanium, at least at reasonable prices. I'm looking at either cheap steppers, robot/RC servos or really cheap gearmotors with current-limited drive. Aiming for 150ms to move 90 degrees including settling time, a motor geared for about 300rpm might do the job.  OK, it would be latching rather than failsafe, but with tellback contacts, that isn't a problem. Also reduces heating to near-zero. It would be a load of faff to make a rotary solenoid from scratch from iron laminations, even with access to a waterjet or laser CNC, when compared with the low cost of steppers and servomotors for 3D printers and robotics.

Neil G4DBN

On 20/02/2020 10:33, John Fell wrote:
Hi Denis,
No , just one of those jobs that needed doing .Some pics may show it .

The Rotary solenoid used was the 35mm RS Components 343-313 , which is 12V and shaft double ended , so I mounted an actuator  disc to set the travel limits .

It is spring return , which has adjustable rate , so forces can be tailored to suit the mechanical demand and confirmation sensors added as required to interface with the sequencing in use .

The original actuator mounting was simulated in Alum sheet ( 4 pillars) and that allows mounting of microswitches or whatever you use  and the travel limiter posts ( rubber sleeves on posts to take out the "clanks")  bolt through it.

To keep the overal height to minimum and provide a non-slip coupling between switch and new actuator , I slit the output shaft of the WG switch with a Junior hacksaw on centreline and inserted a 1mm thick Copper shim plate into a similar slit on the actuator shaft .When pushed together they form a solid link , which should last me , but allow removal as and when /if ever , needed.There is no detectable backlash .

The stainless steel "dome" was a handy "small Dog bowl" , silicone adhesive bonded to the Polycarbonate housing - the box existed and I am too tight to replace with a larger one that would have needed paying for ...... that gave me an extra 20mm height to play with .

Hope that helps .


Re: Italian text - can anyone translate

John Fell
 

Hi Denis,
No , just one of those jobs that needed doing .Some pics may show it .

The Rotary solenoid used was the 35mm RS Components 343-313 , which is 12V and shaft double ended , so I mounted an actuator  disc to set the travel limits .

It is spring return , which has adjustable rate , so forces can be tailored to suit the mechanical demand and confirmation sensors added as required to interface with the sequencing in use .

The original actuator mounting was simulated in Alum sheet ( 4 pillars) and that allows mounting of microswitches or whatever you use  and the travel limiter posts ( rubber sleeves on posts to take out the "clanks")  bolt through it.

To keep the overal height to minimum and provide a non-slip coupling between switch and new actuator , I slit the output shaft of the WG switch with a Junior hacksaw on centreline and inserted a 1mm thick Copper shim plate into a similar slit on the actuator shaft .When pushed together they form a solid link , which should last me , but allow removal as and when /if ever , needed.There is no detectable backlash .

The stainless steel "dome" was a handy "small Dog bowl" , silicone adhesive bonded to the Polycarbonate housing - the box existed and I am too tight to replace with a larger one that would have needed paying for ...... that gave me an extra 20mm height to play with .

Hope that helps .

73
John
G0API

PS . Took some of my Grandchildren up the Spinaker Tower in Pompey this week and saw the 2 new carriers end to end at the quayside .Some very heavy lifting Radar (not active !) and Comms systems in view .

On Wed, 19 Feb 2020 at 20:01, G3UVR Denis via Groups.Io <g3uvr=btinternet.com@groups.io> wrote:
John.

Did you publish any info about your 90deg solenoid to drive the wave guide switch? I have one wave guide switch that also has a burnt out actuator coil and another that is manually turned by hand from position one to position two. I have been pondering for some time on ways to do this.

73 de Denis G3UVR


Re: Waterproof multipole connectors

Conrad, PA5Y
 

Hello Alwyn but only IP40 so not water proof, unless there are more than I can see on Mouser?

 

73

 

Conrad

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of alwyn.seeds1 via Groups.Io
Sent: 18 February 2020 19:47
To: UK Microwaves groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] Waterproof multipole connectors

 

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: Waterproof multipole connectors

Conrad, PA5Y
 

Hi Julian they do look promising thank you. As they are Bulgin I don’t need to buy for all bands at once as they are unlikely to become obsolete. So I can just buy for 70,23 and 13 to start with and add the others later.

 

Thanks again

 

73

 

Conrad PA5Y

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of Julian - M0UGA via Groups.Io
Sent: 18 February 2020 15:32
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] Waterproof multipole connectors

 

[Edited Message Follows]

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




Re: Italian text - can anyone translate

Andy G4JNT
 

Wish I'd seen that warning before I used mine
It is weak



On Wed, 19 Feb 2020 at 21:34, Iain Crawford <iain@...> wrote:
The text translates to:

Important note.
The waveguides are welded with a tin / lead alloy.
Do not put a load on the flanges or put them under stress with the equipment connected to them.

Principal characteristics of the relay:
Insertion loss < 0.3db.
Isolation between ports >55db.
Solenoid voltage:
- Minimum 11v.
- Maximum 14v.
The flanges are made for WR42 waveguide.
The guides are made from brass with dimensions 12x6mm external, 10x4mm internal.


Re: Italian text - can anyone translate

Iain Crawford
 

The text translates to:

Important note.
The waveguides are welded with a tin / lead alloy.
Do not put a load on the flanges or put them under stress with the equipment connected to them.

Principal characteristics of the relay:
Insertion loss < 0.3db.
Isolation between ports >55db.
Solenoid voltage:
- Minimum 11v.
- Maximum 14v.
The flanges are made for WR42 waveguide.
The guides are made from brass with dimensions 12x6mm external, 10x4mm internal.


Re: Italian text - can anyone translate

G3UVR Denis IO83KH
 

John.

Did you publish any info about your 90deg solenoid to drive the wave guide switch? I have one wave guide switch that also has a burnt out actuator coil and another that is manually turned by hand from position one to position two. I have been pondering for some time on ways to do this.

73 de Denis G3UVR


Re: Italian text - can anyone translate

Mike Willis
 

Yes - that app was invaluable in Japan for reading stuff in Kanji and Kana
--
Mike G0MJW


Re: Italian text - can anyone translate

Neil Smith G4DBN
 

On topic for the original question: In case there is anyone still left who doesn't know about the Google Translate app's ability to do live translations what your phone camera: If you run the app and point it at any fairly short bit of foreign language on a road sign, bit of apparatus or instruction sheet, it overlays the English on the live picture. 

I did that with a Chinese PJ-80 DF set.  It is a bit spoooky, but a damn fine bit of actually-useful tech for a change. It even noticed the Chinese text was italicised. Worked OK on the Italian text as well.

Neil G4DBN



Re: Italian text - can anyone translate

John Fell
 

Having seen this design on up close Andy's 24GHZ TVTR I can confirm it is elegant in concept , but lacking in mechanical stability .
A 4 port would be better for ongoing reliability - I modified a commercial one with a complex action and LEDs and sensors  to graft on a 12V 90 degree rotary solenoid and accessible dual conformation contacts .The issue was forced by burn out of the original actuator coil .

73
John
G0API

On Wed, 19 Feb 2020 at 14:03, Neil Smith G4DBN <neil@...> 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
>
>
>
>
>




Re: Italian text - can anyone translate

Chris Bartram G4DGU
 

It pays to be very careful about choosing electroplaters - a firm specialising in one process may not be experienced in the sort of plating we need. I've had fun and games with this in a work context ...

Much 'silver plating' coats the base metal with silver alloys which do not have particularly high conductivity, but which 'brighten-up' the coating ie. make it more shiny! It's important to specify 'high conductivity silver plating' for our purposes. That puts a layer of pure silver on the base surface, and a  good electroplater will keep the current down to keep the 'grain size' of the deposited silver as small as possible.

73

Chris G4DGU

On 19/02/2020 14:41, Pete - GM4BYF via Groups.Io wrote:
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






Re: 23cms

John Fell
 

"Now its impossible with so much RF pollution."
Well it may be worse than it used to be , but using an E-probe or tuned Mag Loop  here reveals plenty of 160m activity going on .
73

John
G0API

On Wed, 19 Feb 2020 at 12:00, G3UVR Denis via Groups.Io <g3uvr=btinternet.com@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


Italian text - can anyone translate

Barry VE4MA
 

That relay only looks like 30 dB isolation..not the 5 dB/ div scale

73
Barry VE4MA/ W7


Re: Italian text - can anyone translate

Dominique Dehays
 

Hi Dave ,


better to avoid this , it is too " fragile". Maybe U could find a WR28 Relcomm switch that was available some years ago. probably there are many unused in some junkboxes.


U can find how it looks there:

http://www.g3pho.free-online.co.uk/microwaves/waveguideswitch.html


73

Dom

Le 19/02/2020 à 10:13, Dave Brown a écrit :
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