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Re: Airscout problems.....help!
Conrad, PA5Y
Thanks Julian, I will give that a try this evening.
Regards
Conrad
From: UKMicrowaves@groups.io <UKMicrowaves@groups.io> on behalf of Julian - M0UGA via groups.io <m0uga.uk@...>
Sent: 18 January 2021 06:13 To: UKMicrowaves@groups.io <UKMicrowaves@groups.io> Subject: Re: [UKMicrowaves] Airscout problems.....help! Hello Conrad,
To keep the Airscout window on top of any other window use a little utility called "Always on Top" Either Google it or download direct here:- https://www.labnol.org/files/always-on-top.zip After virus scanning etc run the utility. Now when the Airscout window is open and the Always on Top utility is running, simply click the Airscout window's title bar to bring the focus to it and then on your keyboard press Ctrl and the spacebar together at the same time. The Airscout window will now overlay any other window that is opened but can still be minimised or closed as required. Regarding SDRC depending on the version you are running (latest?) try reverting to v3.0.24 and try your system again. I had a similar problem on an older machine when Simon released v3.0.25. Do not fear, you won't lose any saved memories, markers or settings by doing so. I'm sure these two solutions will solve your problem. GL
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Audio Keyer, KEYER4, - don't store a blank CW message
A word of warning, something I only discovered by accident DO NOT store a blank message in the CW memory. In other words, when in programming mode, the result you would get by pressing [rtn] directly after the 'E' command. If a blank message is stored in there it may lockup if you subsequently ask it to play that (blank) stored message. In that event, normal operation is restored only by resetting/removing power. Of course, it's not normally something you'd want to do, but ... So far about 54 keyer modules have been supplied - roughly 80% - 90% of the number the initial expressions-of-interest suggested. Which is pretty good. On previous experience with various synthesizer boards in the past, that ratio was lower, more like 50 - 70%. There are still 54 boards left. They're usable for a lot of other projects that call-up an 8 pin PIC and PWM output, so if you've got other ideas and want just a PCB on it's own, just ask. Andy
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Re: Airscout problems.....help!
Jules - M0UGA
Hello Conrad,
To keep the Airscout window on top of any other window use a little utility called "Always on Top" Either Google it or download direct here:- https://www.labnol.org/files/always-on-top.zip After virus scanning etc run the utility. Now when the Airscout window is open and the Always on Top utility is running, simply click the Airscout window's title bar to bring the focus to it and then on your keyboard press Ctrl and the spacebar together at the same time. The Airscout window will now overlay any other window that is opened but can still be minimised or closed as required. Regarding SDRC depending on the version you are running (latest?) try reverting to v3.0.24 and try your system again. I had a similar problem on an older machine when Simon released v3.0.25. Do not fear, you won't lose any saved memories, markers or settings by doing so. I'm sure these two solutions will solve your problem. GL
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Re: Baofeng UV-5R output on 10GHz
Adrian G4UVZ
Hi Clive a pleasure to provide test signals for you ..its such a shame that GB3RPE has ground to a halt again, as a mid point beacon would be extremely valuable in helping us understand the propogation mechanics between us!
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Re: Help with Tektronixs 492 S.A. PSU fault.
Yes Geoff, It's needs a 0.15" pitch extender for the PSU, which I should be able to make. But for the cards on the motherboard it needs something with two row of Pins, how I would make one I don't know. Luckily the faulty 100MHz board was just a module bolted on the underside so easy to get at.
Nick G0HIK
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Re: HP141 - chassis
David GM6BIG
Hi Chris,
toggle quoted messageShow quoted text
The one I have found is not the same as the one in the picture you sent me - sorry. The one I had on the rear of the old chassis is gone. Cheers David
On 17/01/2021 14:20, David GM6BIG wrote:
Hi Chris, --
This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
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Re: HP141 - chassis
David GM6BIG
Hi Chris,
toggle quoted messageShow quoted text
Not found them yet - hopefully not launched during a previous clearout :) Will keep looking.. Hope it is the correct one, a chance it is off an old network analyser pair. Cheers, DAvid
On 17/01/2021 09:17, DAvid wrote:
Hi Chris, --
This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
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Re: HP141 - chassis
David GM6BIG
Hi Chris,
toggle quoted messageShow quoted text
I have some spare 141 chassis, already robbed of a few bits but you cable will be in there im sure. Cheers David
On 17/01/2021 08:54, chris ruddy via groups.io wrote:
--
This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
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Re: HP141
chris ruddy
toggle quoted messageShow quoted text
From: Geoff Robinson VK3KGR
Sent: 17 January 2021 08:52 To: UKMicrowaves@groups.io Subject: Re: [UKMicrowaves] HP141
Chris,
I found this on the web. see page 186 of this PDF https://www.liberatedmanuals.com/TM-11-6625-2781-14-and-P-2.pdf
Regards Geoff VK3KGR
On Sun, Jan 17, 2021 at 6:55 PM chris ruddy via groups.io <mm0kos=yahoo.co.uk@groups.io> wrote:
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Re: HP141
Geoff Robinson VK3KGR
Chris, I found this on the web. see page 186 of this PDF https://www.liberatedmanuals.com/TM-11-6625-2781-14-and-P-2.pdf Regards Geoff VK3KGR
Hi guys
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HP141
chris ruddy
Hi guys
Im looking for some help regarding the HP141 spectrum analyser and thought the best place to look for some help is here. There is a cable (08443-60009) required to inter-connect the 8443A to the 8553B via the 141T for the 0 to 110MHZ. Im wondering if anyone has one of these cables and can check the connections for me before i link up my homebrew effort. Im looking to see if the cable is connected 1 to 1, 2 to 2 etc as i cannot find any information of it online. A greatly appreciated Chris if you could take the effort to do this for me. Thanks Chris MM0KOS
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Whitebox Oscillator Diode Replacement.
I recently bought a whitebox system which arrived in a very poor state.
The oscillator 1st stage had several burnt out resistors and the 2nd stage transformer was shorted. All these easily fixed. But the diode CR3 on the output of the transformer has a crack in it which has rendered it useless. Does anyone know of a suitable replacement for the diode? None of the schematics I can find give part numbers. Thanks, Mark
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Re: Help with Tektronixs 492 S.A. PSU fault.
geoffrey pike
Hi Nick, Aren't Tantalum caps great!, they always fail. There is nothing worse than a board with no tants on it. I assume the 492 is awkward to work at there was a mention of extender boards previously!. The HP analysers of the 80s have fold out boards, but some of the older ones in HP182 mainframes are not easy to work with. Hope it keeps going for you cheers Geoff GI0GDP
On Saturday, 16 January 2021, 11:07:11 GMT, Nick Gregory G0HIK via groups.io <nickg0hik@...> wrote:
I didn't know there was group. I'll join that when it fails next time. The heart always misses a beat when you switch on 1980's test kit. Nick G0HIK
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Re: Crystal holder type
Michael Scott
Thanks John and Francois, just what I needed!
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73, Mike.
On 16/01/2021 13:24, John E. Beech wrote:
Try: http://www.quartslab.com/ click on "holder types"
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Re: Baofeng UV-5R output on 10GHz
After weeks & weeks of hearing nothing, many thanks to Adrian G4UVZ in Taunton for getting a signal across to me. Not very strong but confirms that my rig still works & is till on the correct frequency. It also verified the heading from the field trials with the Baofeng on the prescribed post was spot on for Adrian.
The plan is in addition to changing from 3W to 12W at home with the 1m dish.But to operate "portable" from the top of my upper field from the Land Rover. Previously I had a PU-8 that was relatively weak & was difficult to optimise unless on flat ground. I now have a 5m Hilomast with keyed sections that is considerably more robust which will permanently secured to the Land Rover, this will carry a 65cm dish with elevation control. With height of 5m I will be able to see over our hedge, the lane & the hedge on the other side. Pulling into a carpark on terra firma & putting up a tripod isn't going to cut it round here. With the present viral situation I suspect my field will be the only portable option for a while to come. -- Clive GW4MBS (ex-G8ADP) Pottering on 6m - 3cm in a valley in IO71XW where any QSO is a triumph of optimism over geography!
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Re: Baofeng UV-5R output on 10GHz
Thank you all for replies.
Before discovering the Baofeng phenomenon, I built up a 48MHz module into something from the chipbank. There were two problems. Firstly it was giving output below 10368.00, so it was not convenient to use with my 2m IF. Secondly it drifted badly. It might have been better if I put it in an insulated box & allowed to warm up period, but this would have been a fiddle for the way I want use a signal source. It is not just a test source for receiver sensitivity & frequency check but for dish alignment, which is especially not obvious as I am in a valley firing up hill. The Baofeng is very convenient to use & gives a relatively stable signal, I put it in a plastic bag & walk 150m cautiously up to our top field, although this not the top of the hill but the ground rises more gradually thereafter. It is fitted on a designated fence post, I use a 1m dish & have to get it aligned within a degree. When I have worked G4UVZ (Taunton) I have obviously recorded the heading, subsequently I have placed the Baefong on a post that is in the line of the path. Periodically I traipse up the field to fit the Baofeng, on return I can get a good S2 signal, which is most reassuring that all is well. I recently reviewed that the dish had been blown 12 degrees off alignment. So I am very happy with the Baofeng but can't understand why the frequency change occurred. The nearest I have to a Welsh beacon is GW4NOS who can give me a signal which has an ERP of 5W from the Port Talbot area, but again this is only when there is good rain in the right place. I'm not always sure that rain will always represent the true heading. The traipse up the hill is tiresome because I have to go there a second time to collect the Baefong after the test. It is muddy & mindful that a few yards from the designated post the previous owner collapsed & died have ascended the hill too quickly. I'm considering putting the Baofeng in a waterproof box with a solar panel & leaving it up there. Then with a "beacon" I could have daily reassurance that everything is working & ready to go when the opportunities arise, as long periods of nothing heard can undermine confidence in the system! -- Clive GW4MBS (ex-G8ADP) Pottering on 6m - 3cm in a valley in IO71XW where any QSO is a triumph of optimism over geography!
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Re: Crystal holder type
John E. Beech
toggle quoted messageShow quoted text
-------Original Message-------
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Crystal holder type
Michael Scott
Hi All
Does anyone know the correct designation for a crystal holder which looks like HC49U but is smaller, the dimensions being 8mmx7mmx2mm HxWxD. The Chipbank has a lot this size and although I have Googled various descriptions, I haven't found a specification. Presumably somwhere there is a table of crystal case sizes and specifications as there is for capacitors etc., but I can't find it. Crystal cases brings up DVD cases and jewellery items but nothing electronic! 73, Mike, G3LYP.
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Re: Baofeng UV-5R output on 10GHz
If you want a weak test source at 10Ghz, why not buy yourself a cheap crystal oscillator at 48MHz and connect it to a Schottky diode as a multiplier. Calibrate the frequency against a beacon. Bog standard oscillators run at a few quid each. Picking a couple at random 15 and 20ppm accuracy Or go for a 2PPM 38.4MHz (* 270 = 10368MHz) costing a whopping 87p Mind you, 2PPM is still 20kHz uncertainty on 10GHz. Andy
On Sat, 16 Jan 2021 at 12:45, Andy Talbot <andy.g4jnt@...> wrote:
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Re: Baofeng UV-5R output on 10GHz
You had me intrigued so went and tried mine - tuned to 432.0125 There's a disgusting sounding strong poor quality note at 10368.091 MHz to be found when I place the unsquelched Baofeng near the radio. The actual RF out of the radio measured as 432.0125137 MHz, which is remarkably good sub-1ppm accuracy. Andy
On Sat, 16 Jan 2021 at 12:18, Clive Elliott GW4MBS via groups.io <humber1ton=btinternet.com@groups.io> wrote: I know some of us use the Baofeng UV-5R 2m/70cm hand-held as a signal marker on 10GHz due to the 24th harmonic of the RX LO highlighted in this article:
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