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Re: 2320 PA Modifications?
Colin Ranson
Hi Ben,
I use an Amphenol 316-10744-3 24v..... non latching,
I also use one on my 2m/70cm and 23cm pallets. I came across a few in an closed down Home Office TX site.
Best regards
Colin de G8LBS
Sent from Mail for Windows 10
From: militaryoperator via groups.io
Sent: 29 October 2020 19:40 To: UKMicrowaves@groups.io Subject: Re: [UKMicrowaves] 2320 PA Modifications?
What are folk using for their antenna switching on these amps?
I only have SMA type which I think are not capable of 150W or so at 2.3Ghz, or at least not advisable?
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 ---------------------------------------
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Re: Now for latching relays ...
Pete - GM4BYF
I use an arduino set up to drive latching relays. Many latching
relays do draw current after being latched, so a pulse is needed -
otherwise they can eventually fail. Arduino relays are cheap and
very effective. You can set up the length of pulse very easily by
programming. 73 Pete GM4BYF On 29/10/20 19:46, Steve G4HTZ via
groups.io wrote:
--
vry 73 Pete GM4BYF
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Re: Now for latching relays ...
I use these from w6PQL for driving the latching 26ghz latching 12v relays that were ...maybe still available on eBay ...can be used with 24/28v relays as well http://www.w6pql.com/latching_relay_driver.htm
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Re: 2320 PA Modifications?
militaryoperator
What are folk using for their antenna switching on these amps?
I only have SMA type which I think are not capable of 150W or so at 2.3Ghz, or at least not advisable?
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
---------------------------------------
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Re: Now for latching relays ...
militaryoperator
The problem with latching relays is they need the "24v" pulse in both directions. This circuit does not have a rest time to recharge the cap and send the pulse to the latching relay.
Some sort of circuit is need to isolate the output after it has pulsed the relay into one position so it can recharge ready for changing the relay to the other position. Nick G0HIK Do the relays still pull current once latched? The ones I have dont. I have a Chinese unit 12 to 28, and a relay switched by ptt, center to 28v, NO and NC to latches (NC to rx obviously).
Ben
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Re: Now for latching relays ...
No it's a dual coils, maybe I didn't explain it very well.
But as you say a step up will be simpler. Is there a drive circuit for a dual coil relay. I presume I need to use the tell tale contacts to inhibit TX if the relay fail to transfer. https://www.mouser.co.uk/Teledyne-Relays/Electromechanical/Switches/Coaxial-Switches/CCS-37S-Series/Datasheets/_/N-19ebq?P=1y9bn5wZ1z0zl30 Nick G0HIK
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Re: Now for latching relays ...
Ah, a single coil latching must be a real pain. That's why so many use dual coils I guess. Will ponder - gut reaction says a simple solution should be possible. Although I think I'd take the easy solution and just use a step up PSU Andy
On Thu, 29 Oct 2020 at 19:16, Nick Gregory G0HIK via groups.io <nickg0hik=googlemail.com@groups.io> wrote: Hi Andy,
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Re: Now for latching relays ...
Hi Andy,
Thanks for that, Figure 2 is similar to the circuit that I use. I'll save that Radcom Page though. The problem with latching relays is they need the "24v" pulse in both directions. This circuit does not have a rest time to recharge the cap and send the pulse to the latching relay. Some sort of circuit is need to isolate the output after it has pulsed the relay into one position so it can recharge ready for changing the relay to the other position. Nick G0HIK
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Re: Now for latching relays ...
If that's what you mean, D-Noes July 2014, down from RSGB (and that took some searching, RSGB archive of RadCom are a nightmare - terrible website generally) Andy
On Thu, 29 Oct 2020 at 18:55, Andy Talbot <andy.g4jnt@...> wrote:
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Re: Now for latching relays ...
Well sort of, I thought that it also contained a circuit to drive the relay as well as the doubling.
I've got a great circuit that I've used several times that produces the boost. I thought you might have included a one shot pulse to trigger the relay in the circuit, but maybe not ? Nick G0HIK
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Re: Now for latching relays ...
toggle quoted messageShow quoted text
On Thu, 29 Oct 2020 at 18:49, Nick Gregory G0HIK via groups.io <nickg0hik=googlemail.com@groups.io> wrote: HI Andy,
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Re: Now for latching relays ...
HI Andy,
Could you post the diagram again please, if you still have it. I've found a CS37 relay in my stock, it's a bit too good for 2.4g, but it's available. Many Thanks Nick G0HIK
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Re: Commercially made Yagi for 2.3 & 3.4GHz
Colin Ranson
Andy,
Wimo make flat plates for 2.4 GHz, I tried mine on QO-100, could not get much of a signal in.
Regards,
Colin de G8LBS.
Sent from Mail for Windows 10
From: Andy G4JNT
Sent: 29 October 2020 14:13 To: UK Microwaves groups.io Subject: Re: [UKMicrowaves] Commercially made Yagi for 2.3 & 3.4GHz
For 3.4GHz you may do better with a flat plate antenna. 30cm square, gain ~ 21dBi Not sure if you can get them for 2.3GHz
On Thu, 29 Oct 2020 at 14:04, Andy GD1MIP <gd1mip@...> wrote:
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Re: 122?
Robin Szemeti - G1YFG
The forum Andy mentioned is for a completely different project to the one I am interested in. The one I am interested in is by David Minchin, VK5KK and was featured on the front of a Dubus earlier in the year. It looks like this: I think David has boards and is ready to release, but I understand he is rather busy with work and I have pestered him a few times already, I don't want to pester him again.
On Thu, 29 Oct 2020 at 18:02, Paul G8KFW <paul@...> wrote:
--
Robin Szemeti - G1YFG
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Re: 122?
Oh. I glanced at that article in Dubus, thought "it's the same as the other one" so didn't bother looking at it. Must go back and read it now. Andy
On Thu, 29 Oct 2020 at 18:02, Paul G8KFW <paul@...> wrote:
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Re: Commercially made Yagi for 2.3 & 3.4GHz
Stuart G1ZAR
The Directive Systems ones are centered on 3.456 GHz which is a way from our allocation. Would they need any tweaking for UK use?
Stuart G1ZAR
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Re: 122?
Paul G8KFW
Hi Andy
Could you explain G4JNT Yep, totally different project
Ad com back with information about the other 122 Ghz project
Best regards Paul
From:
UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Robin Szemeti - G1YFG
@G4JNT Yep, totally different project.
On Thu, 29 Oct 2020 at 15:10, Andy G4JNT <andy.g4jnt@...> wrote:
No virus found in this message. --
Paul Bicknell G8KFW South Coast UK
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Re: 10Ghz last night
John Lemay
David
Thanks for the nice report. I guess the 20dB difference in power at each end explains my failure to hear you. A couple of points come to mind:-
…… Starting the contacts with dots or a carrier works well if the signals are not expected to be strong
…… The above is even more helpful if SDR or an audio waterfall is in use because it will show signals that are not yet audible – it’s really tricky beaming up on something you cannot hear.
…… As you were receiving a strong signal from me, it may have been difficult to find the optimum dish heading – which you would need so that I might hear you. Some radios, where each bit of the S meter represent many dB are particularly unhelpful in this matter.
That’s three points – I’ll only invoice you for two !
Importantly, don’t be put off by one failure between us. Conditions will change and it’s only a matter of time.
John G4ZTR
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of david656179 via groups.io
I also extend my thanks to all who tried last night in what was my first 10 Ghz nb experience. I was QRP with just 100mW at the waveguide probe. G4ZTR was a massive signal with me but he did not hear me. I had good fortune to hook up with G4ODA before the contest and he kindly made me his first contact at the start of contest, he was also a massive signal. After may tries via KST and fails, G4CLA took time out to work me, he started with CW and then to SSB because I am yet to master it. He was loud but had heavy doppler and other distortions. Leicester, GB3LEX was a consistent signal on two clear bearings the 20 deg off one was much stronger however. Since visually this has clear take off for many miles and as others have said rain scatter disappeared before start of contest, it seemed to suggest a strong reflection more locally to the beacon site. I took the fact that since I could hear this beacon my RX was acceptable. GB3CAM as expected, was a massive signal and regardless of beam heading, could be heard all the time.
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Re: 122?
Robin Szemeti - G1YFG
@G4JNT Yep, totally different project.
On Thu, 29 Oct 2020 at 15:10, Andy G4JNT <andy.g4jnt@...> wrote:
--
Robin Szemeti - G1YFG
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Re: 122?
Robin Szemeti - G1YFG
@Eric: nope I have not seen your direct mails :( I will go and check the spam.
On Thu, 29 Oct 2020 at 14:56, f1ghb <f1ghb@...> wrote:
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Robin Szemeti - G1YFG
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