Date   

Re: New radio band definition

Andy G4JNT
 

"Friggin' High Frequency" ?
or ...
"Ferkin"   (as everyone knows, a Ferkin is a measure of excess, as in too ferkin big, etc.)

'jnt
(feeling frivolous)



Virus-free. www.avg.com

On 5 October 2017 at 08:35, norman.d.stewart@... [ukmicrowaves] <ukmicrowaves@...> wrote:
 

As technology marches on the demarcation between RF and optical is pushed further up the EM spectrum from 300 GHz to 3 THz. A new definition for this band is therefore required (UHF, SHF, EHF, ?)


Had a few suggestion here at work for the band 300 GHz to 3 THz. My favourite being FHF (Feckin' High Frequency). Not sure that the various standards bodies would go with that one though ;-) 


Any more suggestions?


Ref. ITU-R RR2016, 2.1



Norman GM1CNH



New radio band definition

Norman Stewart
 

As technology marches on the demarcation between RF and optical is pushed further up the EM spectrum from 300 GHz to 3 THz. A new definition for this band is therefore required (UHF, SHF, EHF, ?)


Had a few suggestion here at work for the band 300 GHz to 3 THz. My favourite being FHF (Feckin' High Frequency). Not sure that the various standards bodies would go with that one though ;-) 


Any more suggestions?


Ref. ITU-R RR2016, 2.1



Norman GM1CNH


432 and Above EME Newsletter for October 2017

rein0zn@...
 

Hello All,

The 432 MHz and Above EME Newsletter for October 2017 by K2UYH can be downloaded from:

http://www.nitehawk.com/rasmit/em70cm.html

-- Enjoy

-- Tnx Al.


73 Rein W6SZ


Re: A couple of gripes about 1296MHz

Brian Flynn GM8BJF
 

Hi Martin,

I have sent a message to the admin on Beaconspot.eu to ask if the data can be change. For some reason I am not allowed to change that info. I have also checked to output meter and it is normal. I am not sure of the future of EDN as I will cease to have access to the site in 18 months time. At the moment I am tempted to dismantle it at that point. It has had a good run for its money! The PA module is an old RCA 432 10 W brick feeding a MM tripler. I suspect the both the Brick and MM Tripler have more running hours on them than any others ever made. It has been on since 1978!

I may reinstate the JT4G but I was finding the RDDS problematic for long term operation. I suspect the VCXO needed to have a wider pull-in range.

73s
Brian
--
Dr Brian W Flynn 15 Riselaw Crescent Edinburgh EH10 6HN 0131 447 4043
07969 668 147


Re: Weller soldering iron problem

Michael Scott
 

Hi Stephen
 
No, the sponge is separate from the transformer unit, so Gordon’s suggestion could be right.
 
73, Mike
 

From: Stephen Tompsett stephen@... [ukmicrowaves]
Sent: Wednesday, October 4, 2017 12:00 PM
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] Weller soldering iron problem
 
 

Is your transformer/PSU the type with a wet sponge on top? If so, there is probably a crack/leak...

Stephen Tompsett
 
On 4 Oct 2017 11:53, "Edward Harland g3vpf@... [ukmicrowaves]" <ukmicrowaves@...> wrote:
 

I had a similar problem and had to replace the transformer.

 
Ed G3VzpF


On Wed, 4 Oct 2017 at 11:19, 'Michael Scott' g3lyp@... [ukmicrowaves]
 
Hi All
 
Sorry this is off topic, but my Weller 50 watt 24v soldering iron has suddenly started blowing the mains fuse in the psu. The specified fuse is  315mA, but not sure if it is quick blow or slow blow. I replaced it with a slow blow and this was OK for a while but has gone again. Looking at the psu drawing ( no circuit ) it seems to be a simple mains to 24v transformer with no other electronics.
 
Has anyone else had similar problems, and is there a cure, or do I need to buy a new iron/psu?
 
73, Mike, G3LYP


Re: Weller soldering iron problem

Gordon REASON <gordonj.reason@...>
 

Or a shorted turn in the windings .........................

On 04 October 2017 at 12:00 "Stephen Tompsett stephen@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 

 

Is your transformer/PSU the type with a wet sponge on top? If so, there is probably a crack/leak...

Stephen Tompsett

On 4 Oct 2017 11:53, "Edward Harland g3vpf@... [ukmicrowaves]" <ukmicrowaves@...> wrote:
 

I had a similar problem and had to replace the transformer.


Ed G3VzpF


On Wed, 4 Oct 2017 at 11:19, 'Michael Scott' g3lyp@... [ukmicrowaves]
 

 

Hi All
 
Sorry this is off topic, but my Weller 50 watt 24v soldering iron has suddenly started blowing the mains fuse in the psu. The specified fuse is  315mA, but not sure if it is quick blow or slow blow. I replaced it with a slow blow and this was OK for a while but has gone again. Looking at the psu drawing ( no circuit ) it seems to be a simple mains to 24v transformer with no other electronics.
 
Has anyone else had similar problems, and is there a cure, or do I need to buy a new iron/psu?
 
73, Mike, G3LYP
 

 

 

 


 


 


Re: Weller soldering iron problem

Stephen Tompsett
 

Is your transformer/PSU the type with a wet sponge on top? If so, there is probably a crack/leak...

Stephen Tompsett

On 4 Oct 2017 11:53, "Edward Harland g3vpf@... [ukmicrowaves]" <ukmicrowaves@...> wrote:
 

I had a similar problem and had to replace the transformer.


Ed G3VzpF


On Wed, 4 Oct 2017 at 11:19, 'Michael Scott' g3lyp@... [ukmicrowaves]
 

Hi All
 
Sorry this is off topic, but my Weller 50 watt 24v soldering iron has suddenly started blowing the mains fuse in the psu. The specified fuse is  315mA, but not sure if it is quick blow or slow blow. I replaced it with a slow blow and this was OK for a while but has gone again. Looking at the psu drawing ( no circuit ) it seems to be a simple mains to 24v transformer with no other electronics.
 
Has anyone else had similar problems, and is there a cure, or do I need to buy a new iron/psu?
 
73, Mike, G3LYP


Re: Weller soldering iron problem

Ed G3VPF
 

I had a similar problem and had to replace the transformer.

Ed G3VzpF


On Wed, 4 Oct 2017 at 11:19, 'Michael Scott' g3lyp@... [ukmicrowaves]
wrote:
 

Hi All
 
Sorry this is off topic, but my Weller 50 watt 24v soldering iron has suddenly started blowing the mains fuse in the psu. The specified fuse is  315mA, but not sure if it is quick blow or slow blow. I replaced it with a slow blow and this was OK for a while but has gone again. Looking at the psu drawing ( no circuit ) it seems to be a simple mains to 24v transformer with no other electronics.
 
Has anyone else had similar problems, and is there a cure, or do I need to buy a new iron/psu?
 
73, Mike, G3LYP


Weller soldering iron problem

Michael Scott
 

Hi All
 
Sorry this is off topic, but my Weller 50 watt 24v soldering iron has suddenly started blowing the mains fuse in the psu. The specified fuse is  315mA, but not sure if it is quick blow or slow blow. I replaced it with a slow blow and this was OK for a while but has gone again. Looking at the psu drawing ( no circuit ) it seems to be a simple mains to 24v transformer with no other electronics.
 
Has anyone else had similar problems, and is there a cure, or do I need to buy a new iron/psu?
 
73, Mike, G3LYP


Re: Slang Terms

Gordonjcp <gordon@...>
 

On Tue, Oct 03, 2017 at 03:34:59PM +0000, KENT BRITAIN WA5VJB@... [ukmicrowaves] wrote:
Slang Terms
Many years ago it was popular to make up a blinking circuit out of a small neon light, a 1 uF cap, and a Megohm resistor. Technically a Relaxation Oscillator. On this side of the pond they were often called an "Idiot Light" About 50 years ago a friend made one up with several dozen lights and said it was his digital computer calculating Pi.
Putting together a presentation and wondering if there were any Slang Terms for one of these in the EU?
Chers 2E0VAA/W5
No, but I'll tell you a funny story.

A mate of mine darn sarf had just changed all the bulbs in his new house
from incandescents to compact florries, reasoning that the lower power
consumption would save him money and mean he might get a bit more out of
the rather tired wiring until he could afford to get it rewired.

He was disturbed one night be a bright flash of light, and a few minutes
later another, and another and another and another. Eventually after
getting up and doing that 3am-in-yer-underwear troubleshooting, he
discovered that if he turned the hall lights off with the upstairs
switch, it blinked about once every few minutes, but if he switched them
off with the downstairs switch they stayed off!

Turns out there was a patch of damp in behind the upstairs lightswitch,
and condensation had gotten into the switch and was allowing the
capacitor in the compact florry ballast to charge slowly to the striking
voltage...

--
Gordonjcp MM0YEQ


Re: Stealth SM2527-44 amplifier.

dave cossar
 

my number 44 1292 479217

 

the cw on the button just doesn't make much sense to me

 Dave

 

 


From: ukmicrowaves@... [mailto:ukmicrowaves@...]
Sent: 03 October 2017 19:32
To: ukmicrowaves@...
Subject: Re: [ukmicrowaves] Re: Stealth SM2527-44 amplifier.

 

 

Hi everyone,

Thanks for all replays.

@G8CUB, thanks for de quick measuring results.

@G8AQA Thanks for your respone.

@PA0JME, Rien I know John GHG I shall ask him about the amplifier. I think I see him next week.

I have one, so I hope to get it working on 13cm.
 
Is there someone who knows if there are schematics of the SM2527-44 or the SM3437-43,
because I have also the 3400 version.

73's,
Jacques PA3EVZ


Re: Stealth SM2527-44 amplifier.

Jacques PA3EVZ
 

Hi everyone,

Thanks for all replays.

@G8CUB, thanks for de quick measuring results.

@G8AQA Thanks for your respone.

@PA0JME, Rien I know John GHG I shall ask him about the amplifier. I think I see him next week.

I have one, so I hope to get it working on 13cm.
 
Is there someone who knows if there are schematics of the SM2527-44 or the SM3437-43,
because I have also the 3400 version.

73's,
Jacques PA3EVZ


Re: Slang Terms

KENT BRITAIN
 

I later made one out of those Siemans Gas Discharge Lighting Protectors.

Much better flashes!

I had to prove a point to an Engineer who said they were only good for one discharge.
My point was perhaps only one 1000 amp discharge but his point was only one discharge period.
I had it running in my office for over a year.

Perhaps the simplest relaztion oscillator was the spark gap in a spark gap transmitter. Especially when it was an Arc Gap vs a Spark gap.    The inductance in the power wiring and stray capacitance would make arc oscillate at a very high rate which was good for exciting the tuned circuits.



From: "Gordon REASON gordonj.reason@... [ukmicrowaves]" To: ukmicrowaves <ukmicrowaves@...>
Sent: Tuesday, October 3, 2017 12:21 PM
Subject: Re: [ukmicrowaves] Slang Terms

 
That must be the simplest relaztion oscillator , ever .

On 03 October 2017 at 16:34 "KENT BRITAIN WA5VJB@... [ukmicrowaves]" wrote:

 
 
Slang Terms

Many years ago it was popular to make up a blinking circuit out of a small neon light, a 1 uF cap, and a Megohm resistor.    Technically a Relaxation Oscillator.    On this side of the pond they were often called an "Idiot Light"    About 50 years ago a friend made one up with several dozen lights and said it was his digital computer calculating Pi.     

Putting together a presentation and wondering if there were any Slang Terms for one of these in the EU?

Chers   2E0VAA/W5




alt
alt
 


 

 

 



Re: Slang Terms

Gordon REASON <gordonj.reason@...>
 

That must be the simplest relaztion oscillator , ever .

On 03 October 2017 at 16:34 "KENT BRITAIN WA5VJB@... [ukmicrowaves]" <ukmicrowaves@...> wrote:

 

 

Slang Terms

Many years ago it was popular to make up a blinking circuit out of a small neon light, a 1 uF cap, and a Megohm resistor.    Technically a Relaxation Oscillator.    On this side of the pond they were often called an "Idiot Light"    About 50 years ago a friend made one up with several dozen lights and said it was his digital computer calculating Pi.     

Putting together a presentation and wondering if there were any Slang Terms for one of these in the EU?

Chers   2E0VAA/W5





 


 


 


 


Slang Terms

KENT BRITAIN
 

Slang Terms

Many years ago it was popular to make up a blinking circuit out of a small neon light, a 1 uF cap, and a Megohm resistor.    Technically a Relaxation Oscillator.    On this side of the pond they were often called an "Idiot Light"    About 50 years ago a friend made one up with several dozen lights and said it was his digital computer calculating Pi.     

Putting together a presentation and wondering if there were any Slang Terms for one of these in the EU?

Chers   2E0VAA/W5








Re: A couple of gripes about 1296MHz

Pete - GM4BYF
 

Martin would be very pleased to do some tests with you - but currently masthead preamp is playing up. I am not well sited for the north but do manage to contact GM8IEM on a regular basis via A/S. I would be pleased to do some extended tests both on a direct path and by reflectionn off the Pentland hills. I will be back in touch once am operational again (100W to 57 elements). I can transmit currently so one way contacts are possible and rx limited by lack of masthead is also possible.

73
Pete GM4BYF
On 02/10/17 09:25, 'Martin Andrew' martin.andrew@... [ukmicrowaves] wrote:

After spending a minimal amount I have managed to get back on 1296MHz with what I
consider an averagesystem. Still some optimization to do, but I am asking myself
should I bother with the activity levels on the band.
This morning logged on to KST and see the usual stations there. 18 logged on at 07:45.
Now log on during a contest or activity period and there will be approximately 60 on. These
numbers are for all EU stations, for 'G' presently five logged on (two showing 'away'), during
contests I would expect to see around thirty 'G's' logged on.
WHERE ARE THEY outside activity periods. Or have they beaten me to it by deciding
there is no 23cm activity outside of contests. This is from observation over the last two
months. Yes, there has been almost no tropo recently but what happens to air scatter
outside contests ?. I presume it does not exist.
Many years ago there were some local(?) nets on 23cm. The nearest station to me was
in Edinburgh 270Km distant. Now no activity unless they have become 'private' nets.
I have two beacons that (from earlier experience) should be detectable here.
BOTH are showing as 'operational' on Beaconspot.eu. One is
definately not QRV (unless other info has not been updated) and the other may or may not
be fullyoperational according to information on Beaconspot. I know requests have been made
both on here and at the last microwave meeting at Martelsham to update information,so do I
beleive the information on there or ignore a good resource as probably not up to date. I will
not name the beacons on here but suffice to say both are located in Scotland on the East
side.
So today it is too windy to put the antennas up, but I will hear and work the same number of
stations that I hear when the antennas are up, NON and will probably stay that way until the
next contest. Which begs the question, is it worth staying on what I considered an interesting
band many years ago.
Martin, GM6VXB


Re: A couple of gripes about 1296MHz

Conrad, PA5Y
 

Hello Martin I have quite literally juts got going on 23cms a few weeks ago. I have been calling CQ with a good 100W in the likely directions to no avail. I would not expect you to hear me of course but certainly up to IO94 or so. There is no one on. I have worked DL7QY a couple of times. Of course this coming weekend will be a very different matter for me I expect, the big contest and in central Europe I should get a good idea of my flat band and AP scatter capability.

I must say that I like the band so far.

I could not agree more regarding the beacons, this beacon status issue is frustrating.

Regards

Conrad PA5Y

On 2017-10-03 14:02, 'Martin Andrew' martin.andrew@... [ukmicrowaves] wrote:
Brian,
Yes, I can see a trace on spectran and sometimes hear the CW via
airscatter.
But (only a small but) on Beaconspot.EU it is showing as CW and JT4G.
No problem for me as I would have expected to get JT4 decodes before
hearing CW.
While on the beacon subject, GB3ANG 23CM beacon is showing as
operational
on Beaconspot.EU but as 'off air' on QRZ.COM. Tried listening for
backscatter on ANG
and began to suspect my gear before spotting the information on
QRZ.com.
Last information was:
2016-12-29
17:34
GB3ANG
1296.9530
599
TR
599 in io94 back on!
How many other G/GM/GW/GI beacons are or are not QRV ?.
No point having a useful resourse like Beaconspot.EU if information on
it is
not correct and up to date.
Maybe being a bit pedantic as it is only a hobby.
Martin, GM6VXB
----- Original Message -----
FROM: Brian Flynn brian.flynn@... [ukmicrowaves]
TO: ukmicrowaves@...
SENT: Tuesday, October 03, 2017 10:55 AM
SUBJECT: [ukmicrowaves] Re: A couple of gripes about 1296MHz
Hi Martin,
GB3EDN is still on the air. I have just been listening to it. I am now
retired and it is at my former work QTH but I still have access to the
site. I will be there tomorrow and will check all is well. It is
currently running about 5W and only keys FSK CW.
73s
Brian GM8BJF (GB3EDN beaconkeeper)
Links:
------
[1]
https://groups.yahoo.com/neo/groups/ukmicrowaves/info;_ylc=X3oDMTJlOHZtOWY4BF9TAzk3MzU5NzE0BGdycElkAzgwOTAxMjEEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwN2dGwEc2xrA3ZnaHAEc3RpbWUDMTUwNzAzNjE4Ng--
[2]
https://groups.yahoo.com/neo/groups/ukmicrowaves/members/all;_ylc=X3oDMTJmbDRxMDVmBF9TAzk3MzU5NzE0BGdycElkAzgwOTAxMjEEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwN2dGwEc2xrA3ZtYnJzBHN0aW1lAzE1MDcwMzYxODY-
[3]
https://groups.yahoo.com/neo;_ylc=X3oDMTJkNDg3dmdmBF9TAzk3NDc2NTkwBGdycElkAzgwOTAxMjEEZ3Jwc3BJZAMxNzA1MDYzMTA4BHNlYwNmdHIEc2xrA2dmcARzdGltZQMxNTA3MDM2MTg2
[4] https://info.yahoo.com/privacy/us/yahoo/groups/details.html
[5] https://info.yahoo.com/legal/us/yahoo/utos/terms/


Re: A couple of gripes about 1296MHz

GM6VXB
 


Brian,
 
Yes, I can see a trace on spectran and sometimes hear the CW via airscatter.
But (only a small but) on Beaconspot.EU it is showing as CW and JT4G.
No problem for me as I would have expected to get JT4 decodes before
hearing CW.
 
While on the beacon subject, GB3ANG 23CM beacon is showing as operational
on Beaconspot.EU but as 'off air' on QRZ.COM. Tried listening for backscatter on ANG
and began to suspect my gear before spotting the information on QRZ.com.
Last information was: 
2016-12-29 17:34 GB3ANG 1296.9530 599 TR 599 in io94 back on!
 
How many other G/GM/GW/GI beacons are or are not QRV ?.
No point having a useful resourse like Beaconspot.EU if information on it is
not correct and up to date.
 
Maybe being a bit pedantic as it is only a hobby.
 
Martin, GM6VXB
 
 

----- Original Message -----
Sent: Tuesday, October 03, 2017 10:55 AM
Subject: [ukmicrowaves] Re: A couple of gripes about 1296MHz

 

Hi Martin,

GB3EDN is still on the air. I have just been listening to it. I am now
retired and it is at my former work QTH but I still have access to the
site. I will be there tomorrow and will check all is well. It is
currently running about 5W and only keys FSK CW.

73s

Brian GM8BJF (GB3EDN beaconkeeper)


Re: A couple of gripes about 1296MHz

Brian Flynn GM8BJF
 

Hi Martin,

GB3EDN is still on the air. I have just been listening to it. I am now retired and it is at my former work QTH but I still have access to the site. I will be there tomorrow and will check all is well. It is currently running about 5W and only keys FSK CW.

73s

Brian GM8BJF (GB3EDN beaconkeeper)


Re: Stealth SM2527-44 amplifier.

Roger Ray
 

A quick measurement showed that the gain had dropped to 47dB @ 2.30GHz P1dB just over 20W at +43.1dBm, Psat +43.6dBm. However the efficiency has also dropped, as the current has gone up from 8.0A @2.4G to 8.8A @2.3G for the same O/P

Roger