Jeff
I can't compare the two as I only have the 91b, but would like to
give an input.
I have used the 91b in both cw and ssb contests full blast with
zero problems. It was used full break-in during the CW sprint. No
outboard fan.
I have tested just about every shut-down circuit in the amp as I
have a problem remembering to switch bands. My other amps are
mono-banders or auto band switchers.
I think it is very well made, tunes by the numbers, 2000+ on 160
thru 10 and so far, trouble free.
Noise??? I guess I have been ruined by my wart hog homebrew amps.
Now they make noise. This amp is absolutely "quite" to me. After I
turn the AF gain up on my radio the 91b fan noise is gone.
I think its a great amp for the bucks. AND I get to say that
because I have 16 amps.
Rich KL7RA
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