Henry Kolesnik wrote:
I just got this unit at the ABQ swap and started looking for a a
manual with
Google and found that unit is differnt from the ones I've found
pictured.
It has 3 Collins mechanical filters. At the top upper left it has a
Squelch
control and next to it is a Noise Silencer control. The mode swtich
is
labeled AM and SSB/CW. The lettering looks factory done. The filters
have
been added on a sub chassis and I'm not sure it is a factory mod or
homebrew
but it has been nicely done. The S meter was made by Texas
Instruments. It
has some problems including lots of nosie, hetrodynes, etc.. I've
only seen
one of these in the past and can recall which version it was, they
must be
scarce? Anyone have any info?

--

73
Hank WD5JFR


Hank,

The Hallicrafters didn't come with mechanical filters. The R-274 series
actually had receivers built by both Hallicrafters and Hammarlund. The
Hallicrafters were designated R-274/URR, R-274D/URR and SX-73. The
Hammarlund SP-600's that had the R-274 designation were listed as
R-274A/URR, R-274B/URR and R-274C/URR. The full list can be seen at:
http://www.hammarlund.info/sp600.html

How about a photo of what you got?

Les

wrote in message
oups.com...

Henry Kolesnik wrote:
I just got this unit at the ABQ swap and started looking for a a
manual with
Google and found that unit is differnt from the ones I've found
pictured.
It has 3 Collins mechanical filters. At the top upper left it has a
Squelch
control and next to it is a Noise Silencer control. The mode swtich
is
labeled AM and SSB/CW. The lettering looks factory done. The filters
have
been added on a sub chassis and I'm not sure it is a factory mod or
homebrew
but it has been nicely done. The S meter was made by Texas
Instruments. It
has some problems including lots of nosie, hetrodynes, etc.. I've
only seen
one of these in the past and can recall which version it was, they
must be
scarce? Anyone have any info?

--

73
Hank WD5JFR


Hank,

The Hallicrafters didn't come with mechanical filters. The R-274 series
actually had receivers built by both Hallicrafters and Hammarlund. The
Hallicrafters were designated R-274/URR, R-274D/URR and SX-73. The
Hammarlund SP-600's that had the R-274 designation were listed as
R-274A/URR, R-274B/URR and R-274C/URR. The full list can be seen at:
http://www.hammarlund.info/sp600.html

How about a photo of what you got?

Les


I thought those were all designated FRR?

B.H.

Brian Hill wrote:
wrote in message
oups.com...

Henry Kolesnik wrote:
I just got this unit at the ABQ swap and started looking for a a
manual with
Google and found that unit is differnt from the ones I've found
pictured.
It has 3 Collins mechanical filters. At the top upper left it
has a
Squelch
control and next to it is a Noise Silencer control. The mode
swtich
is
labeled AM and SSB/CW. The lettering looks factory done. The
filters
have
been added on a sub chassis and I'm not sure it is a factory mod
or
homebrew
but it has been nicely done. The S meter was made by Texas
Instruments. It
has some problems including lots of nosie, hetrodynes, etc..
I've
only seen
one of these in the past and can recall which version it was,
they
must be
scarce? Anyone have any info?

--

73
Hank WD5JFR


Hank,

The Hallicrafters didn't come with mechanical filters. The R-274
series
actually had receivers built by both Hallicrafters and Hammarlund.
The
Hallicrafters were designated R-274/URR, R-274D/URR and SX-73. The
Hammarlund SP-600's that had the R-274 designation were listed as
R-274A/URR, R-274B/URR and R-274C/URR. The full list can be seen
at:
http://www.hammarlund.info/sp600.html

How about a photo of what you got?

Les


I thought those were all designated FRR?

B.H.


They are, I goofed and continued on with Hank's URR.

FRR Fixed Radio Receiver

Les