[Henry] New 2KD Classic Owner Hello and Query

[Rocco Lardiere]

Michael,

Congratulations on acquiring the 2KD.  I have a 2KD-5 and love it.  They are
very reliable and easy to operate.  You can reach the WARC bands on them,
too.

There is a two-page addendum to the manual that describes how to add the
10-meter coils - one for the tuned input coil board and the tank L2.  I
found that mine had both installed, but the 10-m input coil was incorrectly
wired.  I changed it, and the amplifer works very well on that band.

If you can't find the two pages anywhere, send me an address, and I will
mail you a xerox of the two pages.  You will have to guesstimate the coil
values and either make them or find some substitutes- but neither is
critical.

Maybe someone on the list can help with original replacement parts.  But L2
should be similar to what is shown on page 11 of the manual - three turns of
heavy copper from the band switch assembly to L3; I can't remember exactly
how many turns are on the one in mine, and I cant see it through the
shielding.  Follow the schematic.  You can play with the turns till it loads
smoothly.  On mine, 10 m phone results in 175 for the tune control and 68
for load at rated SSB input.  The tuned input coil is tuned for a 1/1 match
at the input.  The values are in the parts list.  It should resemble the 15
meter coil but have 5 turns, not 6.  You might be able to use the dummy coil
form.  An excellent match should be possible.

Take a look and make certain the coils are not there already.   As I said,
mine did not work on 10 when I bought it - but the coils were there.

Maybe someone else out there has something to add to this - such as the
dimensions for L2.

73,

Rocco N6KN

----- Original Message ----- 
From: "Michael Melland" <w9wis@charter.net>
To: <henry@mailman.qth.net>
Sent: Monday, September 29, 2003 2:54 AM
Subject: [Henry] New 2KD Classic Owner Hello and Query


> Hi people.... new guy here...Well I wanted one for years and I finally
took
> the plunge and bought a Henry amplifier.  I found it in lightly used
perfect
> condition.... a 2KD Classic vintage 1985 from a fellow in Batavia, IL.
>
> Yesterday I cleaned it all up, checked the tubes (the original Eimac's)
and
> wow..... these things are well built.... like tanks !
>
> No sign there was ever any arcing on the rf components or any other
> problems.... and nice and clean inside too....no smoke.... hardly any
> dust.... woo hoo ! Less work for me.
>
> I did find one sign of an arc in the power supply compartment.  The right
> end of the high voltage diode D101 which is along and just under the left
> rear lip of the amp is connected to D102 ... the other 7.5 KV rectifier
with
> a short jumper.  D101 arced at the point where it is connected to this
> jumper to the inner protective top cover.  I unsoldered the connection and
> resoldered it.... then put shrink wrap over this point.  I have not
powered
> up the amp yet.... need to hook up some 220 to my shack... but the diode
> appears to be fine and the arc doesn't appear to be related to anything
with
> the diodes performance....
>
> It appeared to me that there was a short "peg" of the jumper wire that was
> above the solder point and apparently just close enough to have at one
time
> arced to the cover.
>
> Anyone else ever notice this ?  Any other words of advice on the 2KD
Classic
> ?  This one doen't have 10 meters added.... what's involved in adding it ?
> Looks like a replacement L2 coil at least ?
>
> Thanks,
>
> --
> Michael Melland, W9WIS
> Winneconne, Wisconsin USA EN54pc
> qrp-l #1656 - qrparci # 9875 - iparc #252
> ars #1075  -  http://webpages.charter.net/w9wis/
>
>