[AMPS] RE: Poor Science

Terry Gaiser - W6RU w6ru@lightspeed.net
Mon, 6 Mar 2000 02:07:14 -0800


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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>&nbsp;</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>&nbsp;</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>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>TNX,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Terry W6RU</FONT></DIV>
<DIV>&nbsp;</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.&nbsp; In any case,&nbsp;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.&nbsp; </SPAN></FONT></DIV>
  <DIV><FONT face=3D"Andale Mono" size=3D2><SPAN=20
  class=3D800342905-06032000></SPAN></FONT>&nbsp;</DIV>
  <DIV><FONT face=3D"Andale Mono" size=3D2><SPAN =
class=3D800342905-06032000>Whether=20
  you&nbsp;"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>&nbsp;&nbsp; ... Joe Subich,=20
  W8IK/4&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  &lt;W8IK@Subich.com&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
  &lt;www.qsl.net/W8IK&gt;<BR>&nbsp;</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>.&nbsp;=20
    </FONT></DIV>
    <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</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>&nbsp;<FONT face=3DArial=20
  size=3D2></DIV></BLOCKQUOTE></BLOCKQUOTE></FONT></BODY></HTML>

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