Date   

Re: marconi 6511 detector

Peter G3SMT
 

Rein,

Tried to send the information to you but it was blocked by  :-
hostkarma.junkemailfilter.com

How should we proceed?

73

Peter
G3SMT 

On 18/03/2016 19:04, pa0jme@... [ukmicrowaves] wrote:
 

Hello Peter,

 

Thanks that might be of great help

 

73es Rien



Re: marconi 6511 detector

pa0jme@...
 

Hello Peter,

 

Thanks that might be of great help

 

73es Rien


Re: FS: Transco Y Relay

Paul <paul@...>
 

Hi Al

Follow up to the message I sent a few minutes ago. I also found this in the instructions for the JWM sequencer, "A word of caution related to RF relays that are always in a constant energized state. Most of these relays are not designed to be energized for long periods of time, and will require a good heatsink to dissipate the heat that can build up. Transco “Y” relays for example can be energized for several hours at a time when mounted to an aluminum plate about 12 inches square or so, by ¼ inch to 3/8 inch thick. To provide the best possible heat transfer, use transistor thermal heatsink compound when you mount the relays to the aluminum plate."

Paul G4DCV

On 17-Mar-16 16:47, ALANNOTTAGE@... [ukmicrowaves] wrote:
 

Chris made reference to the coil resistance of the relay.  I have an Amphenol relay with a 110VAC coil.  I believe it's R is ~550 ohms.  It's not to hand just now, but I will check it later.  Thanks to Peter for that rule of thumb - I will need to know that too at some stage!
 
I don't recall which book/mag/internet article I was reading recently, Paul (it could have been the VHF DX manual), but there was a reference to relay heat sinking.  The general thread was that if the relay was energised for RX, it would be a good idea to do so. 
 
Al G0XBV
 



Re: FS: Transco Y Relay

Paul <paul@...>
 

Hi Al

This sent me leafing through my well-thumbed copy of the VHF/UHF DX Book. BTW I wish we had a modern version of this book. No mention of the Transco in the section about coax relays but there is a thread (started by Conrad G0CUZ/PA5Y) on Moon-Net that does indeed suggest heat sinking the Transco is desireable:

http://mailman.pe1itr.com/pipermail/moon-net/2013-June/016517.html

Useful info for anyone who needs to service or repair a Transco here:

http://kl6m.com/LNA-RELAY.pdf

73 Paul G4DCV

On 17-Mar-16 16:47, ALANNOTTAGE@... [ukmicrowaves] wrote:
 

Chris made reference to the coil resistance of the relay.  I have an Amphenol relay with a 110VAC coil.  I believe it's R is ~550 ohms.  It's not to hand just now, but I will check it later.  Thanks to Peter for that rule of thumb - I will need to know that too at some stage!
 
I don't recall which book/mag/internet article I was reading recently, Paul (it could have been the VHF DX manual), but there was a reference to relay heat sinking.  The general thread was that if the relay was energised for RX, it would be a good idea to do so. 
 
Al G0XBV
 



Re: marconi 6511 detector

Peter G3SMT
 

Rien,

The usual cable has 12 connections.  I have the manual for the 69-- series which is a later version of yours but I am unsure if its the same.  However, the circuit may give you some clues so if you don't receive the correct information let me know and I will scan it and send it to you.

73

Peter
G3SMT

On 17/03/2016 17:55, pa0jme@... [ukmicrowaves] wrote:
 

Hello all, a friend of mine bumped into a pair of 6511 detectors (10MHz upto 20GHz)
He was thinking of using them as a replacement for the HP detector 11664 detector, however the Marconi one has 10+ more pins connector. Does anyone have an overview of the connections used in these such as to allow replacement. I recall the HP-device just has 2 supply-voltages 2 grounds as well as a signal wire. Thanks in advance Rien PA0JME




Re: FS: Transco Y Relay

John E. Beech
 

The reason AC relays work is because both polepieces are magnetized by the energizing current. The shorted turn acts like a transformer and increases the magnetizing current at the pole piece. This induced current is in antiphase too the main magnetizing current ( Lenz's Law). This ensures that the magnetic pole is of opposite polarity thus the stator and amature always attract each other irresspective of the direction of current flow. The shaded ploe motors usually have two shorted turns on each pole, one offset from the other so that the  motor always starts rotating in the forward direction.

 
de John G8SEQ

  -------Original Message-------
From: Andy Talbot andy.g4jnt@... [ukmicrowaves]
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] FS: Transco Y Relay
Sent: Mar 18 '16 12:54

 
I believe the purpose of the "shading ring" on AC solenoids is to continue the flux - ie effectively keep a current flowing - during the low portion of the sine.  Quite how it does it I don't know, but I'm just delving into memory of many many decades ago.  
 
 It would have to use non linearities in the core material to work though, as harmonics of the AC flux  would have to be present to fill in the gaps
 
Got me pondering now - having just also remembered shaded pole motors.   I didn't understand them then (1970's) and still don't know exactly what the shorted turn does.
 
'jnt

On 18 March 2016 at 12:31, ALANNOTTAGE@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

 

-----Original Message-----
From: ALANNOTTAGE@... [ukmicrowaves] <ukmicrowaves@...>
To: ukmicrowaves <ukmicrowaves@...>
Sent: Thu, 17 Mar 2016 16:47
Subject: Re: [ukmicrowaves] FS: Transco Y Relay
>Chris made reference to the coil resistance of the relay.  I have an Amphenol relay with a 110VAC coil.  I believe it's R is ~550 ohms.  It's not to hand just now, but I will check it later.  Thanks to Peter for that rule of thumb - I will need to know that >too at some stage!
 
The spec of my coil is 550 ohms and measures out nearer to 500.  In comparison, the 26V DC models are all around 200 ohms.  From a DC perspective, that would seem to bear out everyone's experiences then.  I still have no idea how they actually work with AC applied :>)
 
Al G0XBV
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

 


Re: FS: Transco Y Relay

Alan G0XBV
 

Andy, Peter - that is fascinating stuff.  I just couldn't fathom how it wouldn't hum and chatter!
 
Many thanks!
 
Alan G0XBV 
 

-----Original Message-----
From: Peter Torry peter.torry@... [ukmicrowaves]
To: ukmicrowaves
Sent: Fri, 18 Mar 2016 14:12
Subject: Re: [ukmicrowaves] FS: Transco Y Relay

 
Digging back into my memory I recall that AC relays used a laminated iron core to reduce Eddy current losses and hysteresis losses.  To avoid chatter and humming of the armature part of the pole face had a shading ring fitted. The flux created in this ring, usually copper, is phase shifted relative to the flux in the main core so preventing the main flux from periodically going through zero.
Its a long while since I had a connection with relays rather than just using them.

73

Peter
G3SMT

 

On 18/03/2016 12:37, Andy Talbot andy.g4jnt@... [ukmicrowaves] wrote:
 
I believe the purpose of the "shading ring" on AC solenoids is to continue the flux - ie effectively keep a current flowing - during the low portion of the sine.  Quite how it does it I don't know, but I'm just delving into memory of many many decades ago.  

 It would have to use non linearities in the core material to work though, as harmonics of the AC flux  would have to be present to fill in the gaps

Got me pondering now - having just also remembered shaded pole motors.   I didn't understand them then (1970's) and still don't know exactly what the shorted turn does.

'jnt

 



Re: FS: Transco Y Relay

Peter G3SMT
 

Digging back into my memory I recall that AC relays used a laminated iron core to reduce Eddy current losses and hysteresis losses.  To avoid chatter and humming of the armature part of the pole face had a shading ring fitted. The flux created in this ring, usually copper, is phase shifted relative to the flux in the main core so preventing the main flux from periodically going through zero.
Its a long while since I had a connection with relays rather than just using them.

73

Peter
G3SMT

 

On 18/03/2016 12:37, Andy Talbot andy.g4jnt@... [ukmicrowaves] wrote:
 
I believe the purpose of the "shading ring" on AC solenoids is to continue the flux - ie effectively keep a current flowing - during the low portion of the sine.  Quite how it does it I don't know, but I'm just delving into memory of many many decades ago.  

 It would have to use non linearities in the core material to work though, as harmonics of the AC flux  would have to be present to fill in the gaps

Got me pondering now - having just also remembered shaded pole motors.   I didn't understand them then (1970's) and still don't know exactly what the shorted turn does.

'jnt

 



SRD and Vivaldi question

aa9il@...
 

Hi all
Anyone on the list aware of machined blocks to support the Russian EHF SRD multipliers on the EPay or EU region?

Second question: I have a weak signal source - a LNB diode soldered across an SMA bulkhead connector.  There is a small DC return/choke with a tiny wire loop from the center pin to the ground.  Works great.
Would this method apply to a vivaldi pc board antenna where the diode is essentially across the feed hardline and the metal surface provides the dc return?
Thx 73
Mike
AA9IL


Re: Auto-PLL board..Arrival

Robert Offer <robo959@...>
 

Hi Mike
My thanks for organising this group buy scheme of the auto-pll board. Mine has now arrived and I am most grateful for all the time and effort you have personally put in. Thank You.
Vy 73
Bob
G1ZJP

On Tue, Mar 8, 2016 at 7:10 PM, mb.golfmad@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

Hi everyone,
If you have been waiting for your auto-PLL board to arrive, I am sorry there has been a delay...last week I had to attend a funeral that was totally unexpected and on my return home I have gone down with this cough/flu that is doing the rounds
As soon as I am well again I will contact everyone and start sending the boards out..

My sincere apologies for the delay,

Mike G6TRM



Re: FS: Transco Y Relay

Andy G4JNT
 

I believe the purpose of the "shading ring" on AC solenoids is to continue the flux - ie effectively keep a current flowing - during the low portion of the sine.  Quite how it does it I don't know, but I'm just delving into memory of many many decades ago.  

 It would have to use non linearities in the core material to work though, as harmonics of the AC flux  would have to be present to fill in the gaps

Got me pondering now - having just also remembered shaded pole motors.   I didn't understand them then (1970's) and still don't know exactly what the shorted turn does.

'jnt

On 18 March 2016 at 12:31, ALANNOTTAGE@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

-----Original Message-----
From: ALANNOTTAGE@... [ukmicrowaves] <ukmicrowaves@...>
To: ukmicrowaves <ukmicrowaves@...>
Sent: Thu, 17 Mar 2016 16:47
Subject: Re: [ukmicrowaves] FS: Transco Y Relay

>Chris made reference to the coil resistance of the relay.  I have an Amphenol relay with a 110VAC coil.  I believe it's R is ~550 ohms.  It's not to hand just now, but I will check it later.  Thanks to Peter for that rule of thumb - I will need to know that >too at some stage!
 
The spec of my coil is 550 ohms and measures out nearer to 500.  In comparison, the 26V DC models are all around 200 ohms.  From a DC perspective, that would seem to bear out everyone's experiences then.  I still have no idea how they actually work with AC applied :>)
 
Al G0XBV
 
 
 
 
 
 
 



Re: FS: Transco Y Relay

Alan G0XBV
 

-----Original Message-----
From: ALANNOTTAGE@... [ukmicrowaves]
To: ukmicrowaves
Sent: Thu, 17 Mar 2016 16:47
Subject: Re: [ukmicrowaves] FS: Transco Y Relay

>Chris made reference to the coil resistance of the relay.  I have an Amphenol relay with a 110VAC coil.  I believe it's R is ~550 ohms.  It's not to hand just now, but I will check it later.  Thanks to Peter for that rule of thumb - I will need to know that >too at some stage!
 
The spec of my coil is 550 ohms and measures out nearer to 500.  In comparison, the 26V DC models are all around 200 ohms.  From a DC perspective, that would seem to bear out everyone's experiences then.  I still have no idea how they actually work with AC applied :>)
 
Al G0XBV
 
 
 
 
 
 
 


Re: Auto-PLL board..Arrival

Jim Davidson
 

Hi Mike

Boards arrived safely.

Many thanks for all your effort.

73 JimD, GM3UAG


Re: Offset dish angles

Jim Davidson <seumasd@...>
 

Many thanks to all who responded.

73 JimD, GM3UAG


marconi 6511 detector

pa0jme@...
 

Hello all, a friend of mine bumped into a pair of 6511 detectors (10MHz upto 20GHz)
He was thinking of using them as a replacement for the HP detector 11664 detector, however the Marconi one has 10+ more pins connector. Does anyone have an overview of the connections used in these such as to allow replacement. I recall the HP-device just has 2 supply-voltages 2 grounds as well as a signal wire. Thanks in advance Rien PA0JME




Re: Auto-PLL board..Arrival

geoff Blake
 

Yes Mike, very well done and my thanks to you for organising and all the hard work. I don't suppose I ought to say this within earshot, but I am keeping my eyes skinned for you next target for a group buy.

Thanks again Geoff

#################################################
Geoff Blake,   G8GNZ    JO01fq:   Chelmsford,  Essex,  UK
<geoff@...>    or   <melecerties@...>
Using Linux: Ubuntu 14.04 on Intel or Debian on UltraSparc
    and  Apple  OS  X  El Capitan  on  my  Macbook  Pro.    
                Avoiding Micro$oft like the plague.
#################################################

On 17 March 2016 at 15:29, dave powis g4hup@... [ukmicrowaves] <ukmicrowaves@...> wrote:


Well done, Mike - on behalf of all of us, thanks for taking this on.  It's not trivial..in time or money!

Best 73,
Dave
----Original message----
From : ukmicrowaves@...
Date : 17/03/2016 - 15:20 (GMT)
To : ukmicrowaves@...
Subject : [ukmicrowaves] Re: Auto-PLL board..Arrival

 

Hello everyone,
I am pleased to advise that all the auto-PLL boards were posted today. Sent first class, signed for, to all UK address's, with separate arrangements for all non UK address's.
 Each board has it's own unique serial number, marked on the board and also included in the software.
A copy of the board serial no's / callsign will be sent to OZ5N for his records.
 Please refer to the instructions on OZ5N's web page, for the correct method of installation. I'm sure we will hear on the list, how each of us gets on with our own installation efforts!.
Once I am happy that all the boards have reached their destinations and everything is in order, I will erase all personal details that I have acquired during the process of the bulk buy.
Thank's to you all, everybody to a man, agreed to contribute the excess of their payment to charity, the details of which I will list in the next week or so.
Due to our collective e fforts, we will now be found on our favorite uWave band/s, where we should be, not where we thought we might be.....

That will teach me to suggest a bulk buy!!

Thank you all...

Mike G6TRM







Re: FS: Transco Y Relay

Alan G0XBV
 

Chris made reference to the coil resistance of the relay.  I have an Amphenol relay with a 110VAC coil.  I believe it's R is ~550 ohms.  It's not to hand just now, but I will check it later.  Thanks to Peter for that rule of thumb - I will need to know that too at some stage!
 
I don't recall which book/mag/internet article I was reading recently, Paul (it could have been the VHF DX manual), but there was a reference to relay heat sinking.  The general thread was that if the relay was energised for RX, it would be a good idea to do so. 
 
Al G0XBV
 

-----Original Message-----
From: Paul paul@... [ukmicrowaves]
To: ukmicrowaves
Sent: Wed, 16 Mar 2016 23:25
Subject: Re: [ukmicrowaves] FS: Transco Y Relay

 
As the one that bought the Transco from Chris can I say many thanks to eyeryone for all the advice about operating it on DC. It is very much appreciated. With 110V AC coils I had expected to have to put it in the amplifier and move the amplifier relay to a new masthead amp. But if it will work on 50V DC then I'm happy to put the Transco at the masthead.

I gather it's a good idea to heatsink them by bolting the relay to a lump of aluminium?

I have been after a Transco Y relay for some time but used ones (who can afford a new one!) only seem to come up for sale on ebay in the USA with eye watering postage costs.

73 Paul G4DCV

On 16-Mar-16 19:42, 'Dave' g4fre@... [ukmicrowaves] wrote:
 
My 110V AC coiled Y type works fine in my 48V DC amplifier
 
Dave
G4FRE
 
 
From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 16 March 2016 19:02
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] FS: Transco Y Relay
 


I have successfully used a relay with a 240V AC coil with 100V DC applied in a 2m PA built 40 yrs ago that's still going well. On that basis a supply of around 50V DC might work with 110V AC coils.

73

John G3XDY

On 16/03/2016 18:51, Andy Talbot andy.g4jnt@... [ukmicrowaves] wrote:
On the subject of its 110VAC coil.    I don't have any AC relays of any type  to test this idea, but has anyone ever made tests on an AC relay to find what its DC pull in / hold on characteristics are?
 
I don't know if there are any core differences - apart from its being laminated I suspect on the bigger coils, but can they be operated from a constant voltage, or current?
 
If the requirements end up at reasonable values without the risk of the coil cooking, there are enough SMPSU modules around now with variable output voltage to make use of them.
 
'jnt
 
 
On 16 March 2016 at 18:44, Christopher Bartram cbartram@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 
The relay has now been sold ...

73

Chris

--
Christopher Bartram MIET
Christopher Bartram RF Design
Llygad yr Haul
Carno
CAERSWS
Powys SY17 5LE

phone: +44 1686 237732
mobile: +44 7545 094490
email: cbartram@...
URL: www.christopherbartramrfdesign.com

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Re: Auto-PLL board..Arrival

dave powis <g4hup@...>
 

Well done, Mike - on behalf of all of us, thanks for taking this on.  It's not trivial..in time or money!

Best 73,
Dave

----Original message----
From : ukmicrowaves@...
Date : 17/03/2016 - 15:20 (GMT)
To : ukmicrowaves@...
Subject : [ukmicrowaves] Re: Auto-PLL board..Arrival

 

Hello everyone,
I am pleased to advise that all the auto-PLL boards were posted today. Sent first class, signed for, to all UK address's, with separate arrangements for all non UK address's.
 Each board has it's own unique serial number, marked on the board and also included in the software.
A copy of the board serial no's / callsign will be sent to OZ5N for his records.
 Please refer to the instructions on OZ5N's web page, for the correct method of installation. I'm sure we will hear on the list, how each of us gets on with our own installation efforts!.
Once I am happy that all the boards have reached their destinations and everything is in order, I will erase all personal details that I have acquired during the process of the bulk buy.
Thank's to you all, everybody to a man, agreed to contribute the excess of their payment to charity, the details of which I will list in the next week or so.
Due to our collective e fforts, we will now be found on our favorite uWave band/s, where we should be, not where we thought we might be.....

That will teach me to suggest a bulk buy!!

Thank you all...

Mike G6TRM




Re: Auto-PLL board..Arrival

mike G6TRM
 

Hello everyone,
I am pleased to advise that all the auto-PLL boards were posted today. Sent first class, signed for, to all UK address's, with separate arrangements for all non UK address's.
 Each board has it's own unique serial number, marked on the board and also included in the software.
A copy of the board serial no's / callsign will be sent to OZ5N for his records.
 Please refer to the instructions on OZ5N's web page, for the correct method of installation. I'm sure we will hear on the list, how each of us gets on with our own installation efforts!.
Once I am happy that all the boards have reached their destinations and everything is in order, I will erase all personal details that I have acquired during the process of the bulk buy.
Thank's to you all, everybody to a man, agreed to contribute the excess of their payment to charity, the details of which I will list in the next week or so.
Due to our collective efforts, we will now be found on our favorite uWave band/s, where we should be, not where we thought we might be.....

That will teach me to suggest a bulk buy!!

Thank you all...

Mike G6TRM


Re: Transverter Construction

geoffrey pike
 

Hi Robert,
I have built 2 of these fairly recently so my memories (good or bad) are still active!
regards
Geoff
GI0GDP


On Thursday, 17 March 2016, 0:08, "Robert W Boyd rwboyd@... [ukmicrowaves]" <ukmicrowaves@...> wrote:


 
Hi Everyone:

I'm just getting back into 10 gHz NBFM after working with Gunnplexer
WBFM some yeas ago.

In the process of constructing a DB6NT transverter and, having several
pertinent questions, would appreciate a chat off-list with any of you
who have done so!

73, Robert, VE3BE