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Joe,
The amplifier WAS operating in it's normal configuration ... in fact it =
was in standby ... no idling plate current indicated on the plate meter. =
When I raised the lid nothing shorted !=20
Since this is what caused the "go-bump" as you put it I have to wonder =
what other sort of little things could cause a similar occurrence. You =
tell me what caused the 3-500Z's to come apart inside and short.
TNX,
Terry W6RU
----- Original Message -----=20
From: Joe Subich, W8IK=20
To: Terry Gaiser - W6RU=20
Cc: amps@contesting.com=20
Sent: Sunday, March 05, 2000 9:39 PM
Subject: [AMPS] RE: Poor Science
It may well have been an oscillation but it might have been something=20
else that caused the tube to bias on in saturation. In any case, one=20
cannot call it a "parasitic" event since the amplifier was not =
operating=20
in its normal configuration. =20
Whether you "mistuned" the system or created a short somewhere by=20
lifting the lid is not really germane to the issue of tubes that "go=20
bump" while cut-off in standby.=20
73,
... Joe Subich, W8IK/4=20
<W8IK@Subich.com>
<www.qsl.net/W8IK>
=20
-----Original Message-----
From: Terry Gaiser - W6RU [mailto:w6ru@lightspeed.net]. =20
=20
So Joe, you think it was an oscillation? ... sounds like it to me =
also.
=20
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<DIV><FONT face=3DArial size=3D2>Joe,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>The amplifier WAS operating in it's =
normal=20
configuration ... in fact it was in standby ... no idling plate current=20
indicated on the plate meter. When I raised the lid nothing shorted !=20
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Since this is what caused the "go-bump" =
as you put=20
it I have to wonder what other sort of little things could cause a =
similar=20
occurrence. You tell me what caused the 3-500Z's to come apart inside =
and=20
short.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>TNX,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Terry W6RU</FONT></DIV>
<DIV> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:w8ik@arrl.net"; title=3Dw8ik@arrl.net>Joe Subich, =
W8IK</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
href=3D"mailto:w6ru@lightspeed.net"=20
title=3Dw6ru@lightspeed.net>Terry Gaiser - W6RU</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Cc:</B> <A =
href=3D"mailto:amps@contesting.com"=20
title=3Damps@contesting.com>amps@contesting.com</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, March 05, 2000 =
9:39=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [AMPS] RE: Poor =
Science</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>It may=20
well have been an oscillation but it might have been something=20
</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=20
call it a </SPAN></FONT><FONT face=3D"Andale Mono" size=3D2><SPAN=20
class=3D800342905-06032000>"parasitic" event since the amplifier was =
not=20
operating </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=20
the lid is not really germane to the issue of tubes that "go=20
</SPAN></FONT></DIV>
<DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>bump"=20
while 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>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; =
MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">
<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>. =20
</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></BLOCKQUOTE></FONT></BODY></HTML>
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