RF Amplifier parts Q's

diagrams and such...

Re: RF Amplifier parts Q's

Postby K6IC » Tue May 12, 2009 6:41 pm

Hi Steve,

Thanks for the additional info, and the photos are a gerat help. OK, guess that 6-FETs is a bit too aggressive for my first Class E effort. KF1Z Bruce ahs been a great help as well. Thanks again for everything ! . 73 Vic
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Re: RF Amplifier parts Q's

Postby steve_qix » Tue May 12, 2009 11:28 pm

As a first project, I would highly recommend a transmitter using two(2) 4 MOSFET modules. This design has been reproduced many times, and works very well. Doing 2 bands (160 and 80 meters) in the same RF amplifier is also not a problem. I have done this with my own class E transmitter of the same design. I have NOT as of yet documented the 160 meter addition, however it is fairly simple.

I just need to take some pictures and modify the documentation.

But, that's the one I'd build - 'specially for a first class E project :)

Regards,

Steve
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http://www.classeradio.com
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Re: RF Amplifier parts Q's

Postby kf1z » Wed May 13, 2009 5:33 am

Oh, I don't know about that.. Steve...

I think the dual - band itself is more difficult than adding a pair of mosfets to each module...

BUT, it would be much easier to leave space allocated to those extra fets and drivers to be added later, than it would be to add a second band later!

But, the design documented on the site is indeed pretty much bullet-proof.
And provides as much power as the average user would need. :P
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Re: RF Amplifier parts Q's

Postby steve_qix » Thu May 14, 2009 5:46 am

kf1z wrote:Oh, I don't know about that.. Steve...

I think the dual - band itself is more difficult than adding a pair of mosfets to each module...

BUT, it would be much easier to leave space allocated to those extra fets and drivers to be added later, than it would be to add a second band later!

But, the design documented on the site is indeed pretty much bullet-proof.
And provides as much power as the average user would need. :P


Oh yes - if you go with dual band, don't add it later - build it in UP FRONT. Adding things later is a bother :P
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