Date   

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@FLASH.NET [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@btinternet.com [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@tiscali.co.uk [ukmicrowaves]
TO: ukmicrowaves@yahoogroups.com
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


Re: Stealth SM2527-44 amplifier.

Paul G8AQA
 

The 2527 means 2.5 - 2.7 GHz design frequency and the 44 means +44dBm output.  It seems that they will work outside their design frequency but maybe not very far.

Paul G8AQA

On 02/10/2017 22:37, g8cub@... [ukmicrowaves] wrote:
 

Jacques - I have 2 of these amplifiers combined. From memory they covered 2.40 - 2.75GHz, but will look tomorrow if a single amp works down to 2.30GHz

Roger
G8CUB



Virus-free. www.avg.com


Re: Stealth SM2527-44 amplifier.

Paul G8AQA
 

I have some test results here and they say that the SM2527-44 gives +44dBM at 2.3GHz.

Paul
G8AQA

On 02/10/2017 22:37, g8cub@... [ukmicrowaves] wrote:
 

Jacques - I have 2 of these amplifiers combined. From memory they covered 2.40 - 2.75GHz, but will look tomorrow if a single amp works down to 2.30GHz

Roger
G8CUB



Virus-free. www.avg.com


Re: Stealth SM2527-44 amplifier.

pa0jme@...
 

Hi Jacques, I think John PE1GHG has one or two. For his experiences try to contact him.
If you don't know how, pse contact me privately. I don't want to put John's email here.
73es Rien PA0JME


Re: Stealth SM2527-44 amplifier.

Roger Ray
 

Jacques - I have 2 of these amplifiers combined. From memory they covered 2.40 - 2.75GHz, but will look tomorrow if a single amp works down to 2.30GHz

Roger
G8CUB


Re: A couple of gripes about 1296MHz

Neil Smith G4DBN
 

Having a fixed time slot to get on the band might be a way to drum up some activity, Martin. Myself, I am working away a lot, and when I am home, I have a lot of other projects on the go. As a result, pumping up the mast and searching for a QSO on 23 is not top of my list of priorities. The Thursday evening MGM sessions used to be OK, but are now pretty much hopeless for me as I am rarely at home that night.

I would certainly be up for some regular skeds to do long-term propagation experiments on Monday/Friday/Saturday/Sundays, looking for off-axis scatter perhaps, or at least evaluating the most scattery planes and finding the optimal tx/rx over length and timing for contest exchanges. Keeping the sessions to 30 minutes max and doing a standard set of tests each time would eventually gather a useful body of data, without eating up too much time and energy.

During the day when I'm working from home, I can only do brief operational sessions in coffee breaks and over lunch, and pumping the mast up takes 7 minutes, then 3 minutes to drop it, so I only get 5 minutes operation during the break, hardly worth it. If I had the luxury of a permanently-available antenna, things would be a lot easier.

So, something like "2130z for 30 minutes every Monday and Friday night, using 10 second overs with some MGM aircraftscatter mode on 1296.xxx" might be the basis for a long-term sked which might attract others. Or SSB with 5 second overs during particular plane transits. Or skeds using passive scatter from the ISS, or 10 minute tropo tests or whatever. Someone needs to be the fulcrum of activity and hang in there for months and bug people to get on and operate, like Lyn GW8JLY did last year on 2m SSB. Plenty of DX spots and chatter on KST would also get people interested.

Neil G4DBN


On 02/10/2017 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