SB series sensitivity

[Joe]

Yes, I have one here that is amazing, if you think that is hot try a
6GM6 in V1 and a 6HA6 in V-2 and realign
The one I own has a TRW built LMO drifts about 50Hz to absolute "Zero" in
only 5 minutes.
Have it crystals for 41 and 49M SWL and rare wide AM filter it beats the
pants of the Hammerlund.
I only wish it had a real noise limiter.

-----Original Message-----
From: Mark Graalman WB8JKR <wb8jkr at JUNO.COM>
To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
Date: Thursday, January 18, 2001 12:04 PM
Subject: SB series sensitivity


>  Hi All,
>
>  I recently restored a Heath SB-301 receiver and
>last night I made some MDS measurements that
>really surprise me, I'm wondering if anyone else
>has made like measurements that compare to
>mine, they seem a bit too good if you know what I mean:
>
>
>SB-301
>
>80 meters MDS -136 dbm
>40 meters MDS -136 dbm
>20 meters MDS -136 dbm
>15 meters MDS -135 dbm
>10 meters MDS -135 dbm
>
>(40 meters S9 = 32 uv)
>
> This equates to roughly about .08 to .1 uv for 10db S/N
>on SSB and is considerably better than the Heath specs.
>The above measurements were done with the SSB filter
>which make the readings even more amazing to me.
> I do believe them to be within 2 or 3 DB maximum.
>
>  I was thinking about trying the 6HS6 mod to the RF and
>maybe first mixer, but I don't see the point now.
>
>  Any thoughts ?
>
>73,  Mark  WB8JKR
>
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