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Old 2nd Feb 2021, 6:11 pm   #42
Al (astral highway)
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Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
Default Re: 'Special installation for (Bristol) Blenheim aircraft' - lash-up of test oscillat

Quote:
Originally Posted by Radio Wrangler View Post
Maybe a little test detector, built tiny for low stray L, into a DC meter. Use a Schottky diode.
Hi David, I had a similar thought! I have a crystal diode pulled from a UHF+ mixer, so I could build it around that. It's gold-plated so perhaps I should offer it in the audiophoolery community?

Quote:
Originally Posted by Radio Wrangler View Post
Proving flatness once you get up in frequency becomes, um, interesting.
As I'm finding out! It must be amazing to have the kit that you have and know how to operate it

Quote:
Originally Posted by Radio Wrangler View Post
Just rigging something up at home that will give a reasonable indication to a few hundred MHz takes you a fair way down the path.
That would be very handy. I'm up for some lecher line experiments at the frequencies higher than this little test oscillator and perhaps up to 1GHz if as a challenge. At the very least, I will learn more about test equipment.

In my last major project, that was the area where I had the most frustration and the most learning, pushing the boundaries of my test equipment, knowing when a reading was spurious and then deciding what else I could do about it.
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Last edited by Al (astral highway); 2nd Feb 2021 at 6:38 pm.
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