Heath SB-301

[Mark Graalman WB8JKR]

 I agree completely. I have an SB-301 here and with good
tubes and a good alignment the measured MDS of this
receiver on CW is -137 dBM or about .09 uV/10 dB s/n
ratio. Just as hot as 90% of the receivers today.
 More gain won't make it more sensitive, just more prone
to overload and the SB-301 is MUCH better in that
respect than the SB-303.

73,  Mark  WB8JKR


On Fri, 10 Jan 2003 08:46:39 -0500 "Gerald C. Lemay"
<w1id at FCGNETWORKS.NET> writes:
> That sounds like the old chestnut about swapping the RF amplifier
> tube for
> another with higher gain. Yes, you will get higher gain in the front
> end
> but gain is not a problem in the stock receiver. The SB series
> receivers
> already have too much gain in the front end. Try tuning in 40 meters
> at
> night with a resonant antenna at reasonable height and you'll see
> what I
> mean. In my opinion, this is one instance where it is better to
> leave well
> enough alone. If your receiver has poor sensitivity, I would look
> elsewhere.
>
> > Has anyone tried the "Soup up the SB301 for $7" mod listed in BAMA
> (Boat
> > Anchor Manual Archive)?
> > It describes changing V1 and V6 to higher gm tubes. I was just
> wondering
> > if there is a noticable difference in sensitivity with the new
> tubes.
> >
> > Thanks,
> > Al Schichler, NE2D
> >
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