Mike -
The 6HS6 was a popular "hop-up" for some of the Heath receivers in the
late 60's. It makes a receiver "seem" hotter, because it is a "Sharp
Cutoff" pentode while the 6BZ6 is a more appropriate "Semi-Remote
Cutoff" pentode. This changes the AVC characteristics, making the
S-Meter read higher, but makes the receiver much more sensitive to
overload. Today, with strong signals everywhere, receivers are limited
more by overload and higher man-made noise levels than they are helped
by added RF Gain. You would be much better served to save that 6HS6 for
use as a First Mixer and/or PreMixer and put a considerbly less
expensive 6BZ6 in the V1 socket!
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
Mike Bryce wrote:
Working my way through the pile.
I came upon a R4B that does not quite work right. before I dig into
this receiver, i have a question
according to the manual, V1, A 6BZ6 is the RF amplifier
my radio has the expensive 6HS6 in place of the 6BZ6.
Is this a okay substitute ? Or do I need to order a 6BZ6 someplace?
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