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PA transistor uBITX


 

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Hi all !

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I just wonder if anyone have tested with P16NF06 in the final PA?? for uBITX ??

73 de sm6mpa/Hasse/Gothenburg/Sweden

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THat part is fairly close to the IRF530 and would work ok for the lower bands.

Input capacitance 350pf, robust current at 16A peak, still power limited due to
the device package to 25W.

I've tried the P16NF06 and it was high input capacitance, it was fine for 160 through 40
but getting it to go at 10M required a vastly different circuit due to the low input impedance.

There are a slew of nearly the same parts in the same case characterized as switches but
few that?have been tested for linear amplification and then only by hobby users.? Its the
price paid for cheap.??

I can suggest a list many I've not tried.? But my preference leans to LDMOS and other RF
characterized devices.? ?Many are not cheap like IRF510 but they tend to be very durable.
Then again in the 5 to 55$ range you get what you paid for (least from reliable sources).

Allison


 

A friend of mine gave me a brand new static bag full of MTP3055V Mosfets, as it turns out they make 10 watts at 7mhz easily. Don't know about higher frequencies but it shows you just how many out there will work.

Joel
N6ALT


 

On Sat, Jun 16, 2018 at 02:19 pm, Joel Caulkins wrote:
MTP3055V
Will work fine for the lower bands.? I've used them for 40M and they work ok, shame
they are obsolete.? Some one got them thinking they were 2n3055 by error bought
them and could not find a use for them.? They found their way to me.

Input C is 410PF (nominal) and only 50V.? At 12V it should be OK but power on 20
and up will be lower as the drivers have to work harder.??

It would be like using IRF520.

Allison