https://swling.com/blog/2016/02/ebay-find-the-rca-crm-r6a-communications-receiver/
Atalanta (not meant for SSB)
Mackay Marine 3010-C
SM0AOM
Ham Member
WA1GXC said: ↑
"Never operated one--but read technical reviews--"
Mackay Marine 3010-C
Reviewed in QST
Dial tape made of photographic film. All failing now after 50 years.
I have myself not tested a 3o1oC, but it suffered from the usual 1960s design deficency of putting too much gain before the mixers and the main selectivity.
According to my Norwegian colleagues that used the 3010C in coast station service it was in the league of the Collins 51S-1 but the R-390A was somewhat better in this respect.
One of the toughest tests available during the 70s/80s was to connect an HF receiver to a large rhombic or log-periodic antenna beaming South from the Nordic countries during the afternoon and tune near the 7 or 9 MHz bands.
upload_2020-1-25_16-48-25.png
The highest peaks correspond to an "S-meter" reading at 10
MHz of S9+60 (or 110 dB above the noise) from a 15 dB rhombic antenna.
Few "ordinary" receivers handled this satisfactorily.
73/
Karl-Arne
SM0AOM
The 3010C was the best receiver for below the broadcast band especially with the tunable preselector. It made other receivers appear deaf.
ITT/MACKAY followed these by the transistorized 3020 which was much better on SSB but even so the 3010 could keep up but the thumb wheel frequency selectors made dialing in WCC on 13,033.3 effortless. Just enter and there it was.
73
DR
FWIW, there seem to be three receivers of about the same era,
all made for ship board use or at least marine radio use. They are:
The RCA CRM R6A, the Marconi Atalanta, and the MacKay 3010C.
They are of slightly different vintage but pretty close.
The most advanced seems to be the 3010C. All appear to be
double or double and triple conversion. Curiously, the image
rejection for the R6A is the poorest and is less than the
rejection of the AR-88. It makes me wonder if there is not a
misprint in the instruction manual.
There is also another version of the R6A designed for both AC
and DC supplies, evidently for shipboard use. I can't remember
its type number except its an AR something and have not found an
instruction book for it. Evidently it has another tube.
I am curious about these receivers. Have never used one and
not sure I've ever seen one. I am sure there are members of this
list who are very familiar with them and would like to know about
any comments, experiences, etc.
--
Richard Knoppow
1oldlens1@ix.netcom.com
WB6KBL
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