What are the differences between the Knight T-150 and T-150A?
People keep telling me, "There aren't many differences", but
no one has told me what's different. Anyone know?

73,
Dean K5DH

Hi,

The T-150A was my first rig,
built from a kit in ancient times.

The T-150A had somewhat more internal shielding than the T-150,
to cut down the possibility of VFO chirp.
I don't recall any circuit differences being advertised.

I got a bad shock trying to neutralize the rig,
so it never became a real favorite of mine.
Also, I operated at first on 6 meters, and so got to know
my neighbors who were trying to watch TV.

QST reviewed the T-150 in Jan 1963.

73,
Ed Knobloch

What are the differences between the Knight T-150 and T-150A?
People keep telling me, "There aren't many differences", but
no one has told me what's different. Anyone know?

73,
Dean K5DH

Dean,

What are the differences between the Knight T-150 and T-150A?
People keep telling me, "There aren't many differences", but
no one has told me what's different. Anyone know?

73,
Dean K5DH


You can see schematics and chassis top views of the two transmitters by
scrolling down at:
http://www.virhistory.com/ham/kits.html

The only major difference that I can see is that the T-150A has trimmer
capacitors across L-2 and L-3 in the VFO -- probably to try to help with
VFO stability (notoriously drifty on many T-150s). There may be changes
to some of the other component values as well, but they weren't
immediately obvious.

Northe
N6KO