Date   

Re: Limitation of Portable Operation in the UKuG Low Band Contest 15th November 2020

steve G1PPA
 

Andy
I tried to support the microwave contest during last lockdown, by putting check log, boy did i get some private messages giving me grief for travelling 10 minutes from home QTH 
Steve 
G1PPA 


On Fri, 6 Nov 2020 at 17:47, Andy G4JNT
<andy.g4jnt@...> wrote:
You can operate /P.  You just can't put in an entry.
Depends if you feel competitive, or just want to work people



On Fri, 6 Nov 2020 at 17:41, steve G1PPA via groups.io <steveturner249=yahoo.co.uk@groups.io> wrote:
Hi John 
Just bought 13cm but will unfortunately will have to miss this contest, I cannot operate from home on any microwave band, good luck to all taking part
Steve 
G1PPA 



Re: Limitation of Portable Operation in the UKuG Low Band Contest 15th November 2020

Andy G4JNT
 

You can operate /P.  You just can't put in an entry.
Depends if you feel competitive, or just want to work people



On Fri, 6 Nov 2020 at 17:41, steve G1PPA via groups.io <steveturner249=yahoo.co.uk@groups.io> wrote:
Hi John 
Just bought 13cm but will unfortunately will have to miss this contest, I cannot operate from home on any microwave band, good luck to all taking part
Steve 
G1PPA 


Re: Limitation of Portable Operation in the UKuG Low Band Contest 15th November 2020

steve G1PPA
 

Hi John 
Just bought 13cm but will unfortunately will have to miss this contest, I cannot operate from home on any microwave band, good luck to all taking part
Steve 
G1PPA 


Re: Limitation of Portable Operation in the UKuG Low Band Contest 15th November 2020

John Quarmby
 

Hi Alwyn

Both of these examples are in the open air, where recreation is permitted. Most portable operation at this time of year is in cars or other enclosed environments.

The guidance indicates that travel other than for essential purposes should be avoided, in my view taking part in amateur radio contests when it is possible to enter from a fixed location would not qualify as essential travel.

I do not think that UKuG should encourage operation which could be seen by the authorities as not within the the current covid-19 rules.

73

John G3XDY

On 06/11/2020 15:39, alwyn.seeds1 wrote:
Dear John,

I note that the government has, today, issued revised guidance for metal detectorists to apply during England’s lock-down.

If the government has no objection to fishing and metal detecting going on during lockdown, to say nothing of horse riding, I really cannot see why the government would object to /P operation.

Regards,

Alwyn G8DOH
_____________________________________________________

Alwyn Seeds, Director
SynOptika Ltd.,
114 Beaufort Street,
London,
SW3 6BU,
England.


SynOptika Ltd., Registered in England and Wales: No. 04606737
Registered Office: 114 Beaufort Street, London, SW3 6BU, United Kingdom.
_____________________________________________________


Virus-free. www.avast.com


Re: Limitation of Portable Operation in the UKuG Low Band Contest 15th November 2020

alwyn.seeds1
 

Dear John,

I note that the government has, today, issued revised guidance for metal detectorists to apply during England’s lock-down.

If the government has no objection to fishing and metal detecting going on during lockdown, to say nothing of horse riding, I really cannot see why the government would object to /P operation.

Regards,

Alwyn G8DOH
_____________________________________________________

Alwyn Seeds, Director
SynOptika Ltd.,
114 Beaufort Street,
London,
SW3 6BU,
England.


SynOptika Ltd., Registered in England and Wales: No. 04606737
Registered Office: 114 Beaufort Street, London, SW3 6BU, United Kingdom.
_____________________________________________________


Limitation of Portable Operation in the UKuG Low Band Contest 15th November 2020

John Quarmby
 

The UK Microwave Group will suspend acceptance of contest entries from portable stations in England until 2nd December. Multi-operator entries remain off-limits until further notice.

Single Operator Fixed Station operation is encouraged.

The last UKuG Contest this year is the Low Band event on 1296, 2300, 2320, and 3400MHz which will take place on Sunday 15th November 2020 from 1000 - 1400gmt.

Please follow the latest government guidance and keep safe.

73

John G3XDY
UKuG Contest Manager


--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


Re: SG-Labs,

Colin Ranson
 

Hi Andy,

 

He’s a busy chappie !  I think its a small company and construction of items is subied out, they do non-amateur stuff as well I believe.   I was only getting concerned as all my previous order queries were answered in a very short time.   All’s done now, turn round is 3-4 weeks now due to demand, in fact a local, unbeknown to me, ordered a 3.4GHz unit on or about the same day.

 

I think he has done more to promote serious 23cm activity, let alone the higher bands, even before the 9700 came along.

 

Take care, 73’s

 

Colin G8LBS Ipswich.   

 

Sent from Mail for Windows 10

 

From: Andy GD1MIP
Sent: 06 November 2020 09:33
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] SG-Labs,

 

Colin,  I ordered two of their items in August 2020.  I had to exchange several emails during the whole process, Looking back I found that some emails received a response within an hour whereas some took four days. Allowing for time zone differences and working hours I came to the conclusion that the company is a one man band. Everything arrived within the promised time frame in a tracked parcel. Build quality seems good, the instructions needed reading twice as they were obviously translated into English from Hristiyan's first language with the usual errors.

Andy GD1MIP

 


Re: SG-Labs,

Andy GD1MIP
 

Colin,  I ordered two of their items in August 2020.  I had to exchange several emails during the whole process, Looking back I found that some emails received a response within an hour whereas some took four days. Allowing for time zone differences and working hours I came to the conclusion that the company is a one man band. Everything arrived within the promised time frame in a tracked parcel. Build quality seems good, the instructions needed reading twice as they were obviously translated into English from Hristiyan's first language with the usual errors.

Andy GD1MIP


Looking for datas on ITT SEALECTRO Isolator

f1ghb
 

Hello,
I am looking for informations about an ITT SEALECTRO isolator with SMA connectors Mfg ref : S3T-058506 45A02
Best 73s
Eric F1GHB


Re: UKuG G8ACE OCXO

DougF VK4OE
 

Hey fellows!

I'm pretty sure that I have available a little plastic bag containing all of the components needed for this project.  Happy to negotiate, but it's here in Australia, so international shipping would be involved.

Cheers and 73,

--Doug Friend, VK4OE.

On 06/11/2020 6:24 am, Gary M1EGI wrote:
Hi Adrian,

eBay has a listing for what I hope you are looking for...

I have no connection with the seller!

Hope this helps.


73 Gary M1EGI


Re: UKuG G8ACE OCXO

Gary M1EGI
 

Hi Adrian,

eBay has a listing for what I hope you are looking for...

I have no connection with the seller!

Hope this helps.


73 Gary M1EGI


Re: UKuG G8ACE OCXO

ian hope (2E0IJH)
 

I've got a Q5 Digi-LO that's coming out of my 144mhz Transverter if that's any good for this sort of thing, http://q5signal.com/index.php?route=product/product&product_id=67, currently on 116mhz but has wide range if you read manual, Phase noise was not low enough for me on 144mhz.
 
Ian
M5IJH

 
 
Sent: Thursday, November 05, 2020 at 5:05 PM
From: "geoffrey pike via groups.io" <gi0gdp@...>
To: "UKMicrowaves@groups.io" <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] UKuG G8ACE OCXO
 
Is this the 108.xxxxx MHz OCXO?
cheers
Geoff
GI0GDP
 
On Thursday, 5 November 2020, 15:22:45 GMT, Adrian G4UVZ via groups.io <adrianwhatmore248@...> wrote:
 
 
Following the generocity of friends on this forum and Brian G4NNS's PIC programming skills I now have the MK1 GB3KBQ  beacon on test using the RDDS board.

I am using the original 27 MHz crystal  which means that the keying is not very crisp and I am not sure that it would support JT4G

So the next quest is the matching UKuG G8ACE OCXO ..I have aquired the PCB layout but if there were a pre-printed board or complete OCXO out there it would make things a lot easier!

The Ever optimistic G4UVZ


Re: UKuG G8ACE OCXO

geoffrey pike
 

Is this the 108.xxxxx MHz OCXO?
cheers
Geoff
GI0GDP

On Thursday, 5 November 2020, 15:22:45 GMT, Adrian G4UVZ via groups.io <adrianwhatmore248@...> wrote:


Following the generocity of friends on this forum and Brian G4NNS's PIC programming skills I now have the MK1 GB3KBQ  beacon on test using the RDDS board.

I am using the original 27 MHz crystal  which means that the keying is not very crisp and I am not sure that it would support JT4G

So the next quest is the matching UKuG G8ACE OCXO ..I have aquired the PCB layout but if there were a pre-printed board or complete OCXO out there it would make things a lot easier!

The Ever optimistic G4UVZ


UKuG G8ACE OCXO

Adrian G4UVZ
 

Following the generocity of friends on this forum and Brian G4NNS's PIC programming skills I now have the MK1 GB3KBQ  beacon on test using the RDDS board.

I am using the original 27 MHz crystal  which means that the keying is not very crisp and I am not sure that it would support JT4G

So the next quest is the matching UKuG G8ACE OCXO ..I have aquired the PCB layout but if there were a pre-printed board or complete OCXO out there it would make things a lot easier!

The Ever optimistic G4UVZ


Re: SG-Labs,

Ian White
 

A more modern spreadsheet version of Tcalc is downloadable here:
http://www.ifwtech.co.uk/g3sek/vhfdx/dg8-design-calcs.xls

The pre-loaded example is for 2m, but the same principles apply on microwaves too.

For further details, 'The VHF/UHF DX Book' is now a free download from
http://www.trpub.net/html/dx_book.htm


73 from Ian GM3SEK


On 05/11/2020 12:11, SAM JEWELL via groups.io wrote:
I have previously recommended running either GM3SEK's Tcalc or the old but still very useful Appcad programs to analyse what your system parameters should (could?) be. One word of caution. With AppCad, anyway, cascaded stage intercept numbers do not always stack up due to some cancellations. So I always leave a few dB uncertainty in the calculated dynamic range figure. Noise figures are generally pretty close.

The VLNA preamps are high gain (on70 and 23cm) and moderate on 13 and 9cm. Their output intercept is quite reasonable and may, in many cases, exceed the input intercept of many transverters and rigs such as the IC9700.
Use masthead gain with care. In most cases you do not need to have better than about 1dB noise figure in terrestrial systems, so you may be able to trade off some low noise performance agains loss in a prefilter. Do watch that some preamps have very poor input match and will therefore not terminate filters very well. This can lead to instability in the preamp and even excess loss in the misterminated filter.

73 de Sam, G4DDK





------ Original Message ------ From: "Robin Szemeti - G1YFG" <robin@...> To: UKMicrowaves@groups.io Sent: Thursday, 5 Nov, 20 At 11:39 Subject: Re: [UKMicrowaves] SG-Labs,
I had to put attenuators between my DDK preamp and the SSB electronics transvertor, as even with the cable loss and the preselector filter, there was still far too much gain. The excess gain was OK when the band was quiet, but a real problem during a contest.
On Thu, 5 Nov 2020 at 09:34, Martin Phillips G4CIO <martin@...> wrote:
Yes and no re the preamps.
If you're using the preamp with a low NF transverter or receiver (like the SG labs tvtr) you can get away with quite a lot of cable loss after the preamp. With a mediocre nf receiver you'll still need low loss coax to avoid degrading the nf by much.
10 dB should be enough gain in the SG labs tvrt with its low quoted nf unless the following rx is very poor indeed.
Martin/
On 4/11/20 10:19 PM, militaryoperator via groups.io wrote:
The only trouble with SG Lab tranverters is the low rx gain, 10db. The Kuhne ones have 20db.
The SGL amp for 23 and 13 has an LNA but again, only 10db.
I think Mr H really needs to improve that on his next designs.
There's also a problem with timing on the rf v ptt switching, if you run the pa off the ptt there's a double kick in the pa dropping and going back to rx.
I have the 23, 13 and 9 units and they are very good save for the above caveat.
Ben G4BXD

-- Robin Szemeti - G1YFG


Re: SG-Labs,

SAM JEWELL
 

I have previously recommended running either GM3SEK's Tcalc or the old but still very useful Appcad programs to analyse what your system parameters should (could?) be. One word of caution. With AppCad, anyway, cascaded stage intercept numbers do not always stack up due to some cancellations. So I always leave a few dB uncertainty in the calculated dynamic range figure. Noise figures are generally pretty close.

The VLNA preamps are high gain (on70 and 23cm) and moderate on 13 and 9cm. Their output intercept is quite reasonable and may, in many cases, exceed the input intercept of many transverters and rigs such as the IC9700.
Use masthead gain with care. In most cases you do not need to have better than about 1dB noise figure in terrestrial systems, so you may be able to trade off some low noise performance agains loss in a prefilter. Do watch that some preamps have very poor input match and will therefore not terminate filters very well. This can lead to instability in the preamp and even excess loss in the misterminated filter.

73 de Sam, G4DDK







------ Original Message ------
From: "Robin Szemeti - G1YFG" <robin@...>
To: UKMicrowaves@groups.io
Sent: Thursday, 5 Nov, 20 At 11:39
Subject: Re: [UKMicrowaves] SG-Labs,

I had to put attenuators between my DDK preamp and the SSB electronics transvertor, as even with the cable loss and the preselector filter, there was still far too much gain. The excess gain was OK when the band was quiet, but a real problem during a contest.

On Thu, 5 Nov 2020 at 09:34, Martin Phillips G4CIO <martin@...> wrote:
Yes and no re the preamps.

If you're using the preamp with a low NF transverter or receiver (like the SG labs tvtr) you can get away with quite a lot of cable loss after the preamp. With a mediocre nf receiver you'll still need low loss coax to avoid degrading the nf by much.

10 dB should be enough gain in the SG labs tvrt with its low quoted nf unless the following rx is very poor indeed.

Martin/

On 4/11/20 10:19 PM, militaryoperator via groups.io wrote:

The only trouble with SG Lab tranverters is the low rx gain, 10db. The Kuhne ones have 20db.

The SGL amp for 23 and 13 has an LNA but again, only 10db.

I think Mr H really needs to improve that on his next designs.

There's also a problem with timing on the rf v ptt switching, if you run the pa off the ptt there's a double kick in the pa dropping and going back to rx.

I have the 23, 13 and 9 units and they are very good save for the above caveat.

Ben G4BXD



--
Robin Szemeti - G1YFG


Re: SG-Labs,

militaryoperator
 

I was of course thinking about front end gain, before the rx mixer, not in the o/p gain of the trvrt to the transceiver. 

Even my poor old FT817's have enough life in them to be usable as an IF.

On 9Cm I have a DDK preamp with 26db of gain followed by about 13db of attenuation going into the SGL trvrt with the SGL rx gain turned down as well. 

Anyway, ETTO. 

Ben 

--------------------------------------
Curator, Owner and Display coordinator
Military Wireless Museum
Kidderminster, UK.

This message was meant for the recipient
Any likeness to persons living or dead is odd
---------------------------------------


-----Original Message-----
From: Robin Szemeti - G1YFG <robin@...>
To: UKMicrowaves@groups.io
Sent: Thu, 5 Nov 2020 11:39
Subject: Re: [UKMicrowaves] SG-Labs,

I had to put attenuators between my DDK preamp and the SSB electronics transvertor, as even with the cable loss and the preselector filter, there was still far too much gain.   The excess gain was OK when the band was quiet, but a real problem during a contest.

On Thu, 5 Nov 2020 at 09:34, Martin Phillips G4CIO <martin@...> wrote:
Yes and no re the preamps.

If you're using the preamp with a low NF transverter or receiver (like the SG labs tvtr) you can get away with quite a lot of cable loss after the preamp. With a mediocre nf receiver you'll still need low loss coax to avoid degrading the nf by much.

10 dB should be enough gain in the SG labs tvrt with its low quoted nf unless the following rx is very poor indeed.

Martin/

On 4/11/20 10:19 PM, militaryoperator via groups.io wrote:

The only trouble with SG Lab tranverters is the low rx gain, 10db. The Kuhne ones have 20db.

The SGL amp for 23 and 13 has an LNA but again, only 10db.

I think Mr H really needs to improve that on his next designs.

There's also a problem with timing on the rf v ptt switching, if you run the pa off the ptt there's a double kick in the pa dropping and going back to rx. 

I have the 23, 13 and 9 units and they are very good save for the above caveat. 

Ben G4BXD 


--
Robin Szemeti - G1YFG


Re: SG-Labs,

Robin Szemeti - G1YFG
 

I had to put attenuators between my DDK preamp and the SSB electronics transvertor, as even with the cable loss and the preselector filter, there was still far too much gain.   The excess gain was OK when the band was quiet, but a real problem during a contest.


On Thu, 5 Nov 2020 at 09:34, Martin Phillips G4CIO <martin@...> wrote:
Yes and no re the preamps.

If you're using the preamp with a low NF transverter or receiver (like the SG labs tvtr) you can get away with quite a lot of cable loss after the preamp. With a mediocre nf receiver you'll still need low loss coax to avoid degrading the nf by much.

10 dB should be enough gain in the SG labs tvrt with its low quoted nf unless the following rx is very poor indeed.

Martin/

On 4/11/20 10:19 PM, militaryoperator via groups.io wrote:

The only trouble with SG Lab tranverters is the low rx gain, 10db. The Kuhne ones have 20db.

The SGL amp for 23 and 13 has an LNA but again, only 10db.

I think Mr H really needs to improve that on his next designs.

There's also a problem with timing on the rf v ptt switching, if you run the pa off the ptt there's a double kick in the pa dropping and going back to rx. 

I have the 23, 13 and 9 units and they are very good save for the above caveat. 

Ben G4BXD 



--
Robin Szemeti - G1YFG


Re: Coax for dish feed (suggestions please).

Mark GM4ISM
 

Hi Mike, I'll be looking  for it, I would expect to hear it on RS at the 2W level, possibly not at 20mW.  Path looks excellent, only 236dB troposcatter loss.  You may be able to hear me on troposcatter on the beacon antenna if there are no local obstructions  Alan GM0USI/P copied me (no rain)  at 190km on the Isle of Skye a couple of weeks ago on a bare LNB,  troposcatter PL was 246dB to him!

Please confirm frequency. If you want to set up to listen, I can pop a carrier to you at 50W almost any time. If you run a 35cm+ dish in my direction, I think it will go every day.

On 05/11/2020 09:12, Mike Webb wrote:
Im in the same situation as Andy for 10ghz need a feeder with sma's about a metre long so I can get a beacon on the air and keep all tx indoors. Otherwise hope the waterproof boxes I have remain that way. Its feeding a 20 slot waveguidein a radome which I believe should give 160 deg horizontal coverage. Hope to get a carrier only one going this weekend about 20mW and then within the month one using FT290 and Demi Transverter at about 2W and see how long that lasts. Any special frequency preferred to GM/GI coverage - If it gets to any G's Id be amazed but reports would be appreciated replies to 10Ghz@...

--
Mike GD6ICR IO74PF73TW

Virus-free. www.avg.com


Re: SG-Labs,

Martin Phillips G4CIO
 

Yes and no re the preamps.

If you're using the preamp with a low NF transverter or receiver (like the SG labs tvtr) you can get away with quite a lot of cable loss after the preamp. With a mediocre nf receiver you'll still need low loss coax to avoid degrading the nf by much.

10 dB should be enough gain in the SG labs tvrt with its low quoted nf unless the following rx is very poor indeed.

Martin/

On 4/11/20 10:19 PM, militaryoperator via groups.io wrote:

The only trouble with SG Lab tranverters is the low rx gain, 10db. The Kuhne ones have 20db.

The SGL amp for 23 and 13 has an LNA but again, only 10db.

I think Mr H really needs to improve that on his next designs.

There's also a problem with timing on the rf v ptt switching, if you run the pa off the ptt there's a double kick in the pa dropping and going back to rx. 

I have the 23, 13 and 9 units and they are very good save for the above caveat. 

Ben G4BXD 


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