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You can
write your own review of the Heathkit SB-301.
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NO9E
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Rating: 4/5
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Jan 24, 2001 14:03
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Remarkable radio after modifications
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Time owned: more than 12 months
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Got one used with SB-400 some 18 years go. Initially some bands did not work. After alignment, weak signals were barely heard, and overloading was present on some bands, especially on 40m. A 10/20db attentuator solved the overloading problem. A single-transistor amplifier after the crystal filter solved the weak-signal problem. With its narrow SSB (2.1 KHz) and CW (400 Hz), it was a very nice receiver although the CW filter had some blow by. Very nice AGC and very nice audio. It was my favorite receiver but unfortunately the matching SB-400 transmitter was weak. Perhaps if tweeked like the SB-301, e.g., better mic and addition of processor, the transmitter could have been made punchier.
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WB8JKR
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Rating: 4/5
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Jan 19, 2001 23:19
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30 yr old technology ain't bad!
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Time owned: 0 to 3 months
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I recently restored a old Heathkit SB-301 receiver and made some tests on the units sensitivity and stabilty, the results are VERY
pleasing indeed considering this unit went out of production in 1970.
MDS measurements:
80 meters MDS= -136 DBM
40 meters MDS = -137 DBM
20 meters MDS = -136 DBM
15 meters MDS = -135 DBM
10 meters MDS = -135 DBM
These measurements equate to about .1 uv for 10 db s/n ratio for SSB, which rivals todays rigs.
The S meter reads S9 at an input of 32 uv on 40 meters, this is the only band I checked it on.
I did not make a TT IMD test, but as soon as I
get another SG I intend to do that, I'm guessing I'll see TT dynamic range in the area of 75-80 DB.
The LMO stability is REALLY good, from a cold start to the 5 minute mark the LMO drifted down only 70 Hz, then in the next hour drifted 20 more Hz, and then stayed within 10-15 Hz.
This receiver is really quite impressive considering its 1960 technology and 30 years old!
A little better IF filtering and a noise blanker and this thing would be RIGHT ON!!
Mark WB8JKR
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