[Henry] Henry 2KD

Tue, 11 Feb 2003 15:03:08 -0600

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: [email protected] [mailto:[email protected]]
> Sent: Tuesday, February 11, 2003 2:59 PM
> To: [email protected]
> Subject: [Henry] Henry 2KD
> 
> 
> Troy:
> Does this have the 3-500, 3cx1200A7 or 8877 final? Ron W2WU
> > 
> > From: "Wolford, Troy" <[email protected]>
> > Date: 2003/02/11 Tue AM 10:34:21 CST
> > To: "'[email protected]'" <[email protected]>
> > Subject: [Henry] Questions on Henry 2KD
> > 
> >   I have a Henry 2KD (1986 vintage) that has been acting up 
> for quite some
> > time.
> > I have a couple of questions  regarding how the amp is 
> 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
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> > 
> 
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