Date   

Re: Quality control

militaryoperator
 




Wimo?

Righto.

_


Re: Quality control

Mark - M1MPW
 

Wimo?


Re: X Band ( 8-8.6 ghz) LNA wanted

Andy
 

On 21/11/2020 14:09, Keith wrote:
Just wondering if anyone has, or can direct me to, an LNA that covers 8-8.6 ghz specifically.
Used or new but preferably without sacrificing my first born child :)
The rest of my 8ghz gear is coming together nicely, but a band specific LNA would be a real bonus.
Mr Google isn't helping in my searches .
On the off chance ;)
Cheers
Keith VK6KB/VK6EME
Maybe some guys in Puerto Rico will have some kit for sale :-(

73
Andy


Re: Optimum tone freq for detecting a weak

Bo, OZ2M
 

Perhaps Desi Lydic can help with the numbers: https://www.youtube.com/watch?v=bBpYG7qBBqs


Re: about Crystal manufacturers

Clint Sharp <cjaysharp@...>
 

FWIW, google translate doesn't do a great job of the pdf files available on axtal.com but it does give enough that you can work it out. 


On Sat, 21 Nov 2020, 11:09 Ferdinand DC8EC, <dc8ec@...> wrote:
Hello Francois,

you forgot axtal.com. Lots of technical information and the "quartz cookbook" to download.

Ferdinand DC8EC


File /Quartz Crystal manufacturers/quartz_story.htm uploaded #file-notice

UKMicrowaves@groups.io Notification <noreply@...>
 

The following files have been uploaded to the Files area of the UKMicrowaves@groups.io group.

By: F1CHF

Description:
updated with your inputs ! tks


X Band LNA Wanted

Barry VE4MA
 

Gidday Keith

DownEast Microwave in the USA has them for $150 see model L4-2ULNA

Best 73
Barry VE4MA




Re: Optimum tone freq for detecting a weak

Neil Smith G4DBN
 

There is a whole level of nutjob action on Youtube where they publish copies of music with A set to 432 Hz instead of 440 cos it does Healing and is more in tune with the Universe and stuff.  All about harmonics of Schumann resonances.

Good grief.

Except it isn't.  It's all because Verdi didn't like singers being divas about high notes. Allegedly.

There are even apps that will do the 440->432 conversion.

Gentle pee-extraction of the nuttiness by this guy.... https://www.youtube.com/watch?v=EKTZ151yLnk

Neil G4DBN

On 21/11/2020 13:57, Andy G4JNT wrote:

I posed the same question to an ex-military comms intercept chappess.   Her first comment was that:
 "you're all a bunch of deaf old f__rts who can only ever hear low tones" (they're a rude lot, ex military types) then commented that there were considered to be two 'magic frequencies', but wouldn't say initially what they were.   Today she came back with:
"432Hz is favoured by many in the healing game, occasionally there are them that think 528Hz works better".   

Which has got nothing to do with comms intercept work, and seems more about meditation and cult stuff, but I tried listening to those tone frequencies, including buried in noise.  And she's right.  They do sound 'nice'  and quite detectable.  They also happen to be in the ratio 11/9.  So just for the fun of it, there are now eight user-selectable tones in my gizmo, in the ratio 1.2222222   starting 432, 528, 645 etc up to 1760Hz.   Details will be published in due course (writing it up now, hopefully in time for Scatterpoint)




X Band ( 8-8.6 ghz) LNA wanted

Keith
 

Just wondering if anyone has, or can direct me to, an LNA that covers 8-8.6 ghz specifically.
Used or new but preferably without sacrificing my first born child :)
The rest of my 8ghz gear is coming together nicely, but a band specific LNA would be a real bonus.
Mr Google isn't helping in my searches .
On the off chance ;)
Cheers
Keith VK6KB/VK6EME


Re: Optimum tone freq for detecting a weak

Andy G4JNT
 


I posed the same question to an ex-military comms intercept chappess.   Her first comment was that:
 "you're all a bunch of deaf old f__rts who can only ever hear low tones" (they're a rude lot, ex military types) then commented that there were considered to be two 'magic frequencies', but wouldn't say initially what they were.   Today she came back with:
"432Hz is favoured by many in the healing game, occasionally there are them that think 528Hz works better".   

Which has got nothing to do with comms intercept work, and seems more about meditation and cult stuff, but I tried listening to those tone frequencies, including buried in noise.  And she's right.  They do sound 'nice'  and quite detectable.  They also happen to be in the ratio 11/9.  So just for the fun of it, there are now eight user-selectable tones in my gizmo, in the ratio 1.2222222   starting 432, 528, 645 etc up to 1760Hz.   Details will be published in due course (writing it up now, hopefully in time for Scatterpoint)




Quality control

militaryoperator
 

Someones QC needs looking at!

DSCF3371.JPG


Re: about Crystal manufacturers

Ferdinand DC8EC
 

Hello Francois,

you forgot axtal.com. Lots of technical information and the "quartz cookbook" to download.

Ferdinand DC8EC


Re: Optimum tone freq for detecting a weak

Bo, OZ2M
 

Hello

My empirical findings are that most people prefer somewhere between 600 Hz to 700 Hz. Some below 600 Hz and very few above 700 Hz. I haven't got a clue why 800 Hz ever came into the picture since not many listen to CW at 800 Hz.

Attached is a single slide from one of my presentations at the 2018 RSGB Convention showing the sensitivity of the ear vs frequency and age.

Bo


Re: 5th Overtone Crystals

Adrian G4UVZ
 

Also Krystaly.cz 


about Crystal manufacturers

F1CHF
 

I have uploaded in the files area a list of manufacturers
also on my web site
 
if you have any inputs, don't hesitate 'sorry it is in French ... oupps !
 
Francois F1CHF


File /Quartz Crystal manufacturers/quartz_story.htm uploaded #file-notice

UKMicrowaves@groups.io Notification <noreply@...>
 

The following files have been uploaded to the Files area of the UKMicrowaves@groups.io group.

By: F1CHF

Description:
quartz manufacturers (in French ... sorry)


Re: UK / EU Group Purchase of Si Radar Devices

Dave G8KHU
 

Hi Neil

Ive registered you interest. Last I heard (again August this year) only a few pre production 130 GHz and 300 GHz chips were available - at eye watering prices. I will check again though if this purchase goes ahead.

73 Dave G8KHU


Re: 5th Overtone Crystals

Adrian G4UVZ
 

Thanks for the information..I have put a request into ESKA.DK  and await a response

Adrian


Re: 5th Overtone Crystals

ian hope (2E0IJH)
 

For anyone that needs a LO,I have a spare Digi-LO that has come out of Q5 Transverter it's currently on 116mhz but can be changed, http://q5signal.com/index.php?route=product/product&product_id=67, This one has the higher spec TCXO fitted.
 
Ian
M5IJH

 
 
Sent: Friday, November 20, 2020 at 1:09 PM
From: "mike G6TRM via groups.io" <mike.bryant@...>
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] 5th Overtone Crystals
Hi Adrian,
Have you tried.. 1)Eisch-electronic.com, or   2) Krystaly.cz
 
rgds
 
Mike G6TRM
----- Original Message -----
Sent: Friday, November 20, 2020 12:34 PM
Subject: [UKMicrowaves] 5th Overtone Crystals
 
As part of the GB3KBQ refurb  I need to purchase a 108.0090622 MHz crystal

I have to admit it is a long time since I bought a crystal ..however I had not realised that things had changed so much in the crystal supply industry.

I was prepared for a hike in crystal pricing ..however the industry now appears to be geared to minimum  quantities.

The Best quote I have to date is a minimum of 3 crystals at £18.51 each plus VAT 
The Second best quote is 5 units at £35.69 each  again plus VAT !!
Both quotes are from UK suppliers.

I would be pleased to hear if anyone can supply details of a supplier with a better pricing structure!


Re: Optimum tone freq for detecting a weak

DAVID G4ASR
 

For very, very weak signals in the noise its got to be around 500Hz for me. 

I can then filter out the noise in my brain and just listen only to the low tone which appears centrally about 5cm above my nose.

It takes a few seconds to sync up. Aircraft scatter messes it up somewhat but signals are louder and my brain filter opens up then,

I dont know what others do but for very weak cw signals on the microwave bands I open up the filter bw to 1800Hz, sometimes a bit wider. 

Wish I had my adjustable SG Brown headphones now. 

73 David G4ASR
  

 

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