Date   

Stepdown converter 50V -> 28V

Maarten PA0MHE
 

Has anyone a redundant stepdown converter (22-24A @ 28V) from a ex telecom amplifier laying around ?
My other SSPA's are all 50V but 13cm requires a lower VDD, and I want to reuse these 50V SMPS's.
In most surplus UTMS PA's also a downconverter is present.


Re: 144 MHz TDK circulator

Conrad, PA5Y
 

Oops sorry not intended for the group.

73

Conrad PA5Y


From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Conrad, PA5Y via Groups.Io <g0ruz@...>
Sent: 08 January 2020 13:12
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: [UKMicrowaves] 144 MHz TDK circulator
 
Hello Cor the unit arrived safely, I will test it tonight. 

I did not configure the ports the same when I tuned mine, the port marked load was in the input, the port marked P in was the Pout and the one labelled Pout was the load. Mine work perfectly, it must be possible to allocate the ports differently 🙂

I will test it tonight on the VNA.

Tnx for the contest QSO last night.

Regards

Conrad PA5Y


From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of cor via Groups.Io <cornl@...>
Sent: 05 January 2020 13:48
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] OT - 144 MHz TDK circulator wanted
 
Conrad,
The one on my photo is for sale, 100% OK, currently tuned at 144.3 MHz. See my "for sale" page at PA0P.com.
Price is EURO 20,- (plus 7.50 shipping cost, but you may collect it if you're coming to direction the Hague)

Regards, Cor PA0P


144 MHz TDK circulator

Conrad, PA5Y
 

Hello Cor the unit arrived safely, I will test it tonight. 

I did not configure the ports the same when I tuned mine, the port marked load was in the input, the port marked P in was the Pout and the one labelled Pout was the load. Mine work perfectly, it must be possible to allocate the ports differently 🙂

I will test it tonight on the VNA.

Tnx for the contest QSO last night.

Regards

Conrad PA5Y


From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of cor via Groups.Io <cornl@...>
Sent: 05 January 2020 13:48
To: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: Re: [UKMicrowaves] OT - 144 MHz TDK circulator wanted
 
Conrad,
The one on my photo is for sale, 100% OK, currently tuned at 144.3 MHz. See my "for sale" page at PA0P.com.
Price is EURO 20,- (plus 7.50 shipping cost, but you may collect it if you're coming to direction the Hague)

Regards, Cor PA0P


3cms equipment for GB3XY

Clive, G3GJA
 

Hi All

 

Has anyone got a spare 3cm transverter or a TX upconverter to use with an IF that can be between 100MHz to 1GHz? I’m looking to generate an output on 10.065GHz for the ATV repeater GB3XY that is being converted to DATV. An unused DB6NT kit would be ideal but anything would be considered, working or not.

 

I’m also looking for a 3cm PA that will produce a watt or two of DATV, so may need up to 10w SSB rating. The repeater’s ERP is limited to 7.8dBw but I don’t want to use lots of antenna gain to achieve that; the antenna will be mounted on a guyed Versatower that moves in the wind and previous high gain slot antennas have resulted in a too tight vertical aperture causing deep QSB when it blows a bit.

 

Thanks

 

Clive G3GJA

 

 

HESH Computer Services Limited

Tel: (01482) 324936

12 Louis Pearlman Centre

Web: www.hesh.co.uk

Goulton Street

Registered in England No.: 3003479

Hull

VAT No.: GB 647 3679 95

HU3 4DL

 

Disclaimer:

The information contained in this email may be legally privileged and/or confidential. If you are not the intended recipient, use of this information (including disclosure, copying or distribution) or any action taken, or omitted to be taken, in reliance on it is prohibited and may be unlawful; therefore please inform the sender and delete the message immediately. The views expressed in this email are those of the originator and not necessarily those held by HESH Computer Services Ltd, who do not accept liability for any action taken in reliance on the contents of this message or for the consequences of any computer viruses which may have been transmitted by this email.


Re: WR90 0.55dB 3cms LNA for sale

Conrad, PA5Y
 

Sold already, that was fast!

73

Conrad PA5Y


From: Moon-net <moon-net-bounces@...> on behalf of Conrad PA5Y via Moon-net <moon-net@...>
Sent: 08 January 2020 11:45
To: moon-net@... <moon-net@...>
Cc: UKMicrowaves@groups.io <UKMicrowaves@groups.io>
Subject: [Moon-Net] WR90 0.55dB 3cms LNA for sale
 
Hello I also have a brand new DU3BC 10.368 GHz LNA for sale. 

Specifications are here:


I am asking 175 EUR plus shipping for it. Anybody going to Heelweg this weekend I can bring it with me.

73

Conrad PA5Y


WR90 0.55dB 3cms LNA for sale

Conrad, PA5Y
 

Hello I also have a brand new DU3BC 10.368 GHz LNA for sale. 

Specifications are here:


I am asking 175 EUR plus shipping for it. Anybody going to Heelweg this weekend I can bring it with me.

73

Conrad PA5Y


Re: Elrisa 22W 10.368 GHz PA for sale

Conrad, PA5Y
 

Hello everyone the PA is sold, many thanks for all the interest.

 

73

 

Conrad PA5Y

 

From: Moon-net <moon-net-bounces@...> On Behalf Of Conrad PA5Y via Moon-net
Sent: 07 January 2020 15:23
To: moon-net@...; UKMicrowaves@groups.io
Subject: [Moon-Net] Elrisa 22W 10.368 GHz PA for sale

 

Hello I have an Elrisa 22W 10 GHz PA for sale, it is pre tuned for 10.368 GHz and produces 22W when driven from a Kuhne transverter. I have 2 that I was going combine for EME but will use a single device instead, the other one I will keep for terrestrial.

 

If anyone has a known good GU78b I will do a straight swap.

 

Please send offers to my email. I accept paypal

 

Regards

 

Conrad PA5Y


Test message

Andy G4JNT
 

Test to teh group to test my own btinternet address.

PLEASE DO NOT bother replying to this message- it's just a test for me



Elrisa 22W 10.368 GHz PA for sale

Conrad, PA5Y
 

Hello I have an Elrisa 22W 10 GHz PA for sale, it is pre tuned for 10.368 GHz and produces 22W when driven from a Kuhne transverter. I have 2 that I was going combine for EME but will use a single device instead, the other one I will keep for terrestrial.

If anyone has a known good GU78b I will do a straight swap.

Please send offers to my email. I accept paypal

Regards

Conrad PA5Y


Re: Has anyone got a copy of the 1947 book "Very High Frequency Techniques" by Nelson and Stavis (McGraw-Hill)?

 

On Sun, 5 Jan 2020 at 17:11, Chris Bartram G4DGU <chris@...> wrote:

Hello Dave

One of my first steps when looking for a text or paper is to go to the IET Library. I think thats one of the main reasons I continue to pay my subs! They have been very good at finding odd (sometimes very odd ...) publications.

Cheers,

Chris


Thank you Chris. I must admit that I don’t make much use of my IET membership - I should try to use it more. Sci-hub is my usual source for any scientific paper, but it doesn’t cover books. I don’t know whether sci-hub will ever cover out of print books, but books that are still being published, so the authors still receive payment, would go against the ethos of sci-hub. 


Dave. 


--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...
https://www.kirkbymicrowave.co.uk/
Telephone 01621-680100./ +44 1621 680100

Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United Kingdom


Re: Siglent, Telonic, Lab

 

On Sat, 4 Jan 2020 at 09:04, Paul Phillips <paul.g4kzy@...> wrote:
Hi Ian,


If you are comparing buying new from Siglent or used from, say, HP or Tek I would say that the new equipment has the advantages of being much smaller and lighter,
Yes
a nicer screen
Yes
and can easily generate data and screen shots. 
Yes
Not to mention warranty,
Yes
serviceability etc.

Now, this is where I disagree. The chances of you being able to service a Siglent in a few years once it is outside its warranty period, is a bit remote. I would say you have far more chance of being able to service HP/Agilent kit than any other make.
 
  I have bought a fair amount of used equipment in the past to avoid the very high costs of new test equipment, but these days you would have to think quite hard about these lower cost offerings, unless you really need top end performance.
 
A used high-end instrument is going to hold its value a lot more than a new Siglent too.  The used high-end stuff has done most of its depreciating.


Hope this helps.

73,

Paul G4KZY

Dave, G8WRB.


Re: Siglent, Telonic, Lab

Chris G3WIE
 

As my name was mentioned, I thought I'd better reply...

The Siglent 3032X is good enough for me, but I wouldn't say I'm a particularly exacting user. Before I acquired it, I visited Telonic and Labtronix and took with me an ex-cellular 900MHz BPF with 80dB stopband and a pair of battery-powered 70MHz crystal oscillators a few kHz apart combined with a 6dB hybrid. I persuaded the salesmen to press the buttons to my requirement. Neither was particularly familiar with the instrument, but both managed to do what I asked - a how-easy-is-it test. The Siglent could get further down (70dB+) into the stopband of the filter, both gave a creditable picture of the two-tone oscillator with no signs of intermods down to the noise at 60dB which was likely the oscillators. The Siglent doesn't have a touch screen. With both, if you narrow RBW and VBW too much you can wait tens of seconds for a scan! Previously I had use of an HP 8558B/HP182 mainframe and I've taken photos from its screen in similar circumstances which implies both Rigol and Siglent could apply more DSP.

The SIglent has an ethernet socket but support is via National Instrument software which I'm not about to get involved in. I haven't found any information that would enable me to write my own beyond using a socket and SCPI (primitve) commands

Using my Siglent over the last 2 years I have only the usual niggles about the user interface that you get from anyone with any piece of equipment.  It sometimes corrupts a screenshot file being written to a USB stick; there's no 'safely remove' menu item and I now wait 20 seconds before unplugging.  I had trouble with a licence key not accepted; you need one to enable the extra features. Labtronix sorted it out very promptly. I've had a couple of firmware upgrades with no apparent change in performance.

Service/warranty in both cases was return to factory, not in UK. Siglent have an office in Germany. I now see that siglent.co.uk takes you to a Telonic site, they now sell both Rigol and Siglent! Other support aspects may have changed since I got mine a couple of years ago.

Hope that's of some help; happy to correspond off-list if it is of interest

73

Chris G3WIE


Re: Mail G8BKE

Andy G4JNT
 

Google translate's version :-)

image.png

Andy G4JNT



On Sun, 5 Jan 2020 at 20:16, F1CHF <F1CHF@...> wrote:



Mail G8BKE

F1CHF
 

A friend is looking for this G8
his email is bad ...(G8BKE23 ...)
who knows ?
 
have you such think for UK as we have in France ?
tks and super happy new year
Francois F1CHF
 


Re: Has anyone got a copy of the 1947 book "Very High Frequency Techniques" by Nelson and Stavis (McGraw-Hill)?

Chris Bartram G4DGU
 

Hello Dave

One of my first steps when looking for a text or paper is to go to the IET Library. I think thats one of the main reasons I continue to pay my subs! They have been very good at finding odd (sometimes very odd ...) publications.

Cheers,

Chris

On 05/01/2020 13:50, Dr. David Kirkby, Kirkby Microwave Ltd wrote:
The subject pretty much says it all. I'm looking for some information from that book. If you have a copy, could you send me an email and we can discuss the relevant bit I want.

Dr David Kirkby Ph.D C.Eng MIET
Email: drkirkby@... Web: https://www.kirkbymicrowave.co.uk/
Kirkby Microwave Ltd (Tel 01621-680100 / +44 1621-680100)
Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT.




Re: Has anyone got a copy of the 1947 book "Very High Frequency Techniques" by Nelson and Stavis (McGraw-Hill)?

Mark GM4ISM
 

David
try looking at
 
UCL  and the British Library have a copy
 
 
 
Close but not the one you are looking for, I have the RSGB VHF Technique 1948,  Bayliss and Williams  just in case there is common content from that era?
 
Mark GM4ISM
 
 

Sent: Sunday, January 05, 2020 1:50 PM
Subject: [UKMicrowaves] Has anyone got a copy of the 1947 book "Very High Frequency Techniques" by Nelson and Stavis (McGraw-Hill)?
 
The subject pretty much says it all. I'm looking for some information from that book. If you have a copy, could you send me an email and we can discuss the relevant bit I want.

Dr David Kirkby Ph.D C.Eng MIET
Email: drkirkby@... Web: https://www.kirkbymicrowave.co.uk/
Kirkby Microwave Ltd (Tel 01621-680100 / +44 1621-680100)
Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT.




Has anyone got a copy of the 1947 book "Very High Frequency Techniques" by Nelson and Stavis (McGraw-Hill)?

 

The subject pretty much says it all. I'm looking for some information from that book. If you have a copy, could you send me an email and we can discuss the relevant bit I want.

Dr David Kirkby Ph.D C.Eng MIET
Email: drkirkby@... Web: https://www.kirkbymicrowave.co.uk/
Kirkby Microwave Ltd (Tel 01621-680100 / +44 1621-680100)
Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT.




Re: OT - 144 MHz TDK circulator wanted

cor
 

Conrad,
The one on my photo is for sale, 100% OK, currently tuned at 144.3 MHz. See my "for sale" page at PA0P.com.
Price is EURO 20,- (plus 7.50 shipping cost, but you may collect it if you're coming to direction the Hague)

Regards, Cor PA0P


Re: OT - 144 MHz TDK circulator wanted

Conrad, PA5Y
 

Actually Cor it turns out that these are rated at 50W reflected and having just tested at 100W with a 2:1 VSWR they are fine for my application.

 

I bought 2 of them for my 2m IMD test setup, so I will have to find 2 more now.

 

Regards

 

Conrad PA5Y

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of cor via Groups.Io
Sent: 04 January 2020 16:08
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] OT - 144 MHz TDK circulator wanted

 

Hello Conrad,

 

Is this what you are looking for?

 

HNY, Cor PA0P

 

 

 

From: Conrad, PA5Y

Sent: Saturday, January 04, 2020 2:22 PM

Subject: [UKMicrowaves] OT - 144 MHz TDK circulator wanted

 

Hello all,

 

Sometime ago there were some TDK circulators for 2m doing the rounds, they were good for 150W on 144 MHz. I gave mine to the GB3VHF boys 😉 Anyway I am looking for 2 more, please check your junk boxes.

 

Many thanks and HNY.

 

Conrad PA5Y


Re: OT - 144 MHz TDK circulator wanted

Conrad, PA5Y
 

Hello Cor, no I have 2 of those for my IMD measurement set up but they are only 50W, I need 100W handling. The ones I want are TDK and handle 150W with N types. Or of course anything else that is similar.

 

73

 

Conrad

 

From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> On Behalf Of cor via Groups.Io
Sent: 04 January 2020 16:08
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] OT - 144 MHz TDK circulator wanted

 

Hello Conrad,

 

Is this what you are looking for?

 

HNY, Cor PA0P

 

 

 

From: Conrad, PA5Y

Sent: Saturday, January 04, 2020 2:22 PM

Subject: [UKMicrowaves] OT - 144 MHz TDK circulator wanted

 

Hello all,

 

Sometime ago there were some TDK circulators for 2m doing the rounds, they were good for 150W on 144 MHz. I gave mine to the GB3VHF boys 😉 Anyway I am looking for 2 more, please check your junk boxes.

 

Many thanks and HNY.

 

Conrad PA5Y