HW-100 Vs 101

[Ray Mack]

Well at  least I remembered correctly that there was a 6AU6 in there :<)  Pretty
cool that there is a JFET in there too.  Would have been pretty expensive back
in 1969.  I'll have to look at the schematic to see if the "bad" diode from gate
to ground is in there.  Dr. Rohde says that is definately a bad thing for good
operation.

I presume that the SB-100, 101, 102 used the same VFO?  I'll have to look at the
schematics.

Ray Mack
WD5IFS
mack at mails.imed.com


______________________________ Reply Separator _________________________________
Subject: Re: HW-100 Vs 101
Author:  "R. L. Blaney" <wb8mhe at BRIGHT.NET> at mails
Date:    7/24/98 2:54 PM

<snip>
If we can beleive the 1969 Heath catalog in front of me now, which states,
"And the HW-100 is the only rig that uses a Field Effect Transistor (FET) in
the VFO for superior thermal stability." the HW-100 evidently used a
Junction field effect transistor, (JFET), as the VFO, which was then
followed by a 6AU6  tube as a buffer.
<snip>

--- --- --- --- --- --- --- --- --- --- --- --- --- --
To subscribe: listserv at listserv.tempe.gov
and in body: subscribe HEATH yourfirstname yourlastname
To unsubscribe:  listserv at listserv.tempe.gov
and in body: signoff HEATH
Archives for HEATH: http://www.tempe.gov/archives
--- --- --- --- --- --- --- --- --- --- --- --- --- --