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It may well have been an oscillation but it might have been something
else that caused the tube to bias on in saturation. In any case, one
cannot call it a "parasitic" event since the amplifier was not operating
in its normal configuration.
Whether you "mistuned" the system or created a short somewhere by
lifting the lid is not really germane to the issue of tubes that "go
bump" while cut-off in standby.
73,
... Joe Subich, W8IK/4
<W8IK@Subich.com>
<www.qsl.net/W8IK>
-----Original Message-----
From: Terry Gaiser - W6RU [mailto:w6ru@lightspeed.net].
So Joe, you think it was an oscillation? ... sounds like it to me also.
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<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>It may well=20
have been an oscillation but it might have been something =
</SPAN></FONT></DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>else that=20
caused the tube to bias on in saturation. In any case, one=20
</SPAN></FONT></DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>cannot call=20
it a </SPAN></FONT><FONT face=3D"Andale Mono" size=3D2><SPAN=20
class=3D800342905-06032000>"parasitic" event since the amplifier was not =
operating=20
</SPAN></FONT></DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>in its=20
normal </SPAN></FONT><FONT face=3D"Andale Mono" size=3D2><SPAN=20
class=3D800342905-06032000>configuration. </SPAN></FONT></DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN=20
class=3D800342905-06032000></SPAN></FONT> </DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>Whether=20
you "mistuned" the system or created a short </SPAN></FONT><FONT=20
face=3D"Andale Mono" size=3D2><SPAN class=3D800342905-06032000>somewhere =
by=20
</SPAN></FONT></DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>lifting the=20
lid is not really germane to the issue of tubes that "go =
</SPAN></FONT></DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>bump" while=20
cut-off in standby. </SPAN></FONT></DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>
<P><FONT size=3D2>73,<BR> ... Joe Subich,=20
W8IK/4 <BR> =20
<W8IK@Subich.com><BR> =20
<www.qsl.net/W8IK><BR> </FONT> </P></SPAN></FONT></DIV>
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<DIV align=3Dleft class=3DOutlookMessageHeader dir=3Dltr><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> Terry Gaiser - =
W6RU=20
[mailto:w6ru@lightspeed.net]</FONT><FONT face=3DArial size=3D2>. =
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>So Joe, you think it was an =
oscillation? ...=20
sounds like it to me also.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> <FONT face=3DArial=20
size=3D2></DIV></BLOCKQUOTE></FONT></BODY></HTML>
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