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<p>Hi Riho,</p>
<p>these old 12V Mitsubishi Mosfets should be only used when you can
execute predistortion. IMD3 as well gain is bad and not the state
of the art. Things become terrible if you cascade an other
external power amp. LDMOS is a much better choice: 16 dB(!) more
gain, at least 10 dB more IMD and mismatch 1:60 without damage. To
get 48V supply voltage is no problem with cheap step-up
converters. <br>
</p>
<p>Happy 'home brewing'.</p>
<p>73, Helmut, DC6NY<br>
</p>
<div class="moz-cite-prefix">Am 08.11.2021 um 03:29 schrieb Riho B.,
ES7AAZ:<br>
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<div dir="ltr">
<div dir="ltr">Thank you for the info, Graham. I will replace
them then. I see 3rd order IM products 24dB below test tone in
the two tone test which is not bad at all, but could be
better.</div>
<div dir="ltr"><br>
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--<br>
<div dir="ltr" class="gmail_signature">
<div dir="ltr"><i><font color="#666666">73,</font></i>
<div><i><font color="#666666">Riho ES7AAZ</font></i> </div>
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<div dir="ltr" class="gmail_attr">Kontakt Graham / KE9H (<<a
href="mailto:ke9h.graham@gmail.com" moz-do-not-send="true"
class="moz-txt-link-freetext">ke9h.graham@gmail.com</a>>)
kirjutas kuupäeval E, 8. november 2021 kell 02:18:<br>
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<div dir="ltr">They are not matched.
<div><br>
</div>
<div>--- Graham / KE9H</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Nov 7, 2021 at
5:49 PM Riho B., ES7AAZ <<a
href="mailto:es7aaz@gmail.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">es7aaz@gmail.com</a>>
wrote:<br>
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<div dir="ltr">Hi all,<br>
<br>
<div>does anybody know were the MOSFET's a matched
pair or not in TAPR PennyWhistle kit?<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr">
<div dir="ltr"><i><font color="#666666">73,</font></i>
<div><i><font color="#666666">Riho ES7AAZ</font></i>
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target="_blank" moz-do-not-send="true"><font
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