[Henry] Henry 2KD

[W2WU]

Troy:
Sorry, I don't have that schematic. I have data for the 8877 & 3cx1200.
Acting up can mean anything:
Is it oscillating / unstable?
Those are transmitting doorknobs-the insulation could have punctured
Replace any "black beauty" caps with orange drops.
Check resistors

I'd conclude:
(1) Installed values were factory chosen.
(2) Henry Didn't document Production changes.
(3) Contact ARRL TIS. They may have diagram or product review
(4) Contact Ted Shannon @ Henry
(5) Other list members may have more input
73, Ron W2WU
----- Original Message -----
From: "Wolford, Troy" <t-wolford@ti.com>
To: <henry@mailman.qth.net>
Sent: Tuesday, February 11, 2003 13:03
Subject: RE: [Henry] Henry 2KD


> This is a pair of 3-500Z, original Varian/Eimacs.  Tubes tested full
output
> (950-1000) from an AL-80B.
>
> Troy
> KC5KDM
>
> > -----Original Message-----
> > From: w2wurjj@verizon.net [mailto:w2wurjj@verizon.net]
> > Sent: Tuesday, February 11, 2003 2:59 PM
> > To: henry@mailman.qth.net
> > Subject: [Henry] Henry 2KD
> >
> >
> > Troy:
> > Does this have the 3-500, 3cx1200A7 or 8877 final? Ron W2WU
> > >
> > > From: "Wolford, Troy" <t-wolford@ti.com>
> > > Date: 2003/02/11 Tue AM 10:34:21 CST
> > > To: "'Henry@mailman.qth.net'" <Henry@mailman.qth.net>
> > > Subject: [Henry] Questions on Henry 2KD
> > ><snip>
> > > 2KD (1986 vintage) acting up
> > > questions  regarding built/wired up versus
> > > what the schematic says.
> > >
> > > 1.  In the output circuit immediately after the parasitic
> > supressors and DC
> > > blocking caps , switch S1C manipulates contacts to add in
> > shunt doorknob
> > > caps.
> > > Based on the schematic, parts location sheet and bill of
> > materials, the
> > > switch should work as follows with respect to the
> > bandswitch position:
> > >
> > > 10M - 75pF shunt
> > > 15M - 75pF shunt
> > > 20M - 150pF shunt
> > > 40M - 225pF shunt
> > > 80M - 275pF shunt
> > >
> > > Based on observing the component values, this is what that
> > part of the amp
> > > actually implements:
> > >
> > > 10M - 25pF shunt
> > > 15M - 25pF shunt
> > > 20M - 50pF shunt
> > > 40M - 125pF shunt
> > > 80M - 275pF shunt
> > >
> > > The actual operating state makes more sense to me.  I guess
> > my question is:
> > > Is my amp built right or is the documentation correct (i.e.
> > my amp is
> > > wrong)?
> > >
> > > Any help would be greatly appreciated.
> > >
> > > 7 3
> > > Troy
> > > KC5KDM