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Problem with Henry 2KDSwap the tubes to the opposite sockets, and see
if the brighter one moves, or the darker one is now the
brighter one.
You have probably also zapped a padder capacitor in
the tuning or loading section of the tank.
Please report what you find.
GL!
Phil, K5PC
Phil Clements
410 VZ CR 4903
Ben Wheeler, TX 75754
----- Original Message -----=20
From: Wolford, Troy=20
To: 'amps@contesting.com'=20
Sent: Wednesday, August 29, 2001 12:53 PM
Subject: [AMPS] Problem with Henry 2KD
Let me begin by saying that I did a very bad thing to my henry!=20
Here is how it went.=20
I was preparing to tune up on 80M. I let it warm up for a few minutes =
and applied=20
about 10W drive. Had the tune and load controls set to the nominal =
numbers from=20
previous use, BUT REVERSED. I.E. Not enough inductor and way too =
much load C.=20
To top this off, I had the bandswitch in the 40M position. So I had a =
SEVERE=20
output matching error.=20
Anyway, as I was adjusting the tuning, I heard a klunk (sic?) and the =
RF output dropped=20
quite a bit. I only had it up to about 100W out, or so. Definitely =
was not a high voltage=20
bang, but more mechanical in nature. Now I have to use the load =
control at almost full=20
meshed position and about 20 - 30 counts more on the roller inductor =
to get max power on=20
80M. Also 1 tube lights up a lot more than the other (very =
noticable). I opened it up to=20
have a look under the hood, and found no charcoal or shattered =
components. Not even the=20
smell of burnt electrical components. The AMP still makes about 1200W =
on 80M, but the=20
large change in tuning values concerns me, as well as the tubes not =
being "balanced".=20
I suspect that I have killed one tube and damaged the other.=20
1986 vintage 2KD Classic, Pair 3-500Z (Eimac)=20
Any help would be appreciated.=20
7 3=20
Troy=20
KC5KDM=20
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<HTML><HEAD><TITLE>Problem with Henry 2KD</TITLE>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
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<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>Swap the tubes to =
the=20
opposite sockets, and see</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>if the brighter =
one moves, or=20
the darker one is now the</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>brighter =
one.</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>You have probably =
also zapped=20
a padder capacitor in</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>the tuning or =
loading section=20
of the tank.</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" =
color=3D#0000ff></FONT> </DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>Please report =
what you=20
find.</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>GL!</FONT></DIV>
<DIV><FONT face=3D"Slashed Zero Arial" color=3D#0000ff>Phil, =
K5PC<BR></FONT></DIV>
<DIV>Phil Clements<BR>410 VZ CR 4903<BR>Ben Wheeler, TX 75754<BR></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dt-wolford@ti.com href=3D"mailto:t-wolford@ti.com";>Wolford, =
Troy</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Damps@contesting.com=20
href=3D"mailto:'amps@contesting.com'">'amps@contesting.com'</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, August 29, =
2001 12:53=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [AMPS] Problem with =
Henry=20
2KD</DIV>
<DIV><BR></DIV>
<P><FONT size=3D2>Let me begin by saying that I did a very bad thing =
to my=20
henry!</FONT> </P>
<P><FONT size=3D2>Here is how it went.</FONT> </P>
<P><FONT size=3D2>I was preparing to tune up on 80M. I let it =
warm up for=20
a few minutes and applied</FONT> <BR><FONT size=3D2>about 10W =
drive. Had=20
the tune and load controls set to the nominal numbers from</FONT> =
<BR><FONT=20
size=3D2>previous use, BUT REVERSED. I.E. Not enough =
inductor and=20
way too much load C.</FONT> <BR><FONT size=3D2>To top this off, I had =
the=20
bandswitch in the 40M position. So I had a SEVERE</FONT> =
<BR><FONT=20
size=3D2>output matching error.</FONT> </P>
<P><FONT size=3D2>Anyway, as I was adjusting the tuning, I heard a =
klunk (sic?)=20
and the RF output dropped</FONT> <BR><FONT size=3D2>quite a bit. =
I only=20
had it up to about 100W out, or so. Definitely was not a high =
voltage=20
</FONT><BR><FONT size=3D2>bang, but more mechanical in nature. Now I =
have to use=20
the load control at almost full </FONT><BR><FONT size=3D2>meshed =
position and=20
about 20 - 30 counts more on the roller inductor to get max power on=20
</FONT><BR><FONT size=3D2>80M. Also 1 tube lights up a lot more =
than the=20
other (very noticable). I opened it up to </FONT><BR><FONT =
size=3D2>have a=20
look under the hood, and found no charcoal or shattered =
components. Not=20
even the </FONT><BR><FONT size=3D2>smell of burnt electrical =
components. =20
The AMP still makes about 1200W on 80M, but the </FONT><BR><FONT =
size=3D2>large=20
change in tuning values concerns me, as well as the tubes not being=20
"balanced".</FONT> <BR><FONT size=3D2>I suspect that I have killed one =
tube and=20
damaged the other.</FONT> </P>
<P><FONT size=3D2>1986 vintage 2KD Classic, Pair 3-500Z (Eimac)</FONT> =
</P>
<P><FONT size=3D2>Any help would be appreciated.</FONT> </P>
<P><FONT size=3D2>7 3</FONT> <BR><FONT size=3D2>Troy</FONT> <BR><FONT=20
size=3D2>KC5KDM</FONT> </P></BLOCKQUOTE></BODY></HTML>
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