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4hv.org :: Forums :: General Science and Electronics
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Bruker BFX-5 RF amplifier

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Proud Mary
Tue Oct 13 2009, 04:58PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
TheMerovingian wrote ...

I don't understand correctly how to use the inputs; need i to supply both the carrier and the modulating signal?

It is a linear amplifier, therefore intended to amplify modulated signals, without introducing significant distortion.

Why not try increasing the load impedance to, say, 600R, and see if that has any effect on the distortion?
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TheMerovingian
Tue Oct 13 2009, 06:53PM
TheMerovingian Registered Member #14 Joined: Thu Feb 02 2006, 01:04PM
Location: Prato/italy
Posts: 383
So the modulation inputs aren't important?
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Proud Mary
Tue Oct 13 2009, 07:23PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
TheMerovingian wrote ...

So the modulation inputs aren't important?

They're important if you want to amplify a modulated signal!

How about injecting some other functions into it to see how they distort? Square and triangle.
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TheMerovingian
Tue Oct 13 2009, 08:20PM
TheMerovingian Registered Member #14 Joined: Thu Feb 02 2006, 01:04PM
Location: Prato/italy
Posts: 383
I will try do reduce the load. Regarding other waveforms: they are distorted as well. I will try to use two waveform generators: one at high freq sinewave (10Mhz, homebuilt) and another at low freq (squarewave) to ON-OFF modulate it to see some differences. Being an NMR amplifier it sometime work in power-pulse mode, modulated by the program to rotate the spin of the nuclei by a given angle, so i'm trying to simulate those conditions
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Sulaiman
Thu Oct 15 2009, 06:54PM
Sulaiman Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
I'd expect this amplifier to amplify AM, SW and VHF Radio and TV signals,
so be careful you don't accidentally make part of your eqipment an antena.
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TheMerovingian
Thu Oct 15 2009, 08:08PM
TheMerovingian Registered Member #14 Joined: Thu Feb 02 2006, 01:04PM
Location: Prato/italy
Posts: 383
Sulaiman wrote ...

I'd expect this amplifier to amplify AM, SW and VHF Radio and TV signals,
so be careful you don't accidentally make part of your eqipment an antena.

If it works... cheesey
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