[Hallicrafters] S40A Help


Mike Everette radiocompass at yahoo.com
Fri May 20 22:18:53 EDT 2011


I don't think the dial color is an indicator of S-40 vs S-40A.  I have a Canadian S-40, or at least an S-40 with a Rogers Majestic tag on the back, that has the green dials.  And an 80 rectalfire.

I've seen a few S-40 receivers on eVilbay with amber dials, but they are definitely in the minority.

The only difference between the 90 and 5Y3 is the base; 4 pins for the 89 vs the octal on the 5Y3.  Unless maybe the early S-40s used a field coil speaker, like their parent S-20R?  My Canadian S-40 has a PM speaker.

Does the Rogers Majestic tag indicate that the radio was actually built in Canada, or merely imported by Rogers Majestic?  I've seen an SX-28 with such a tag as well, but no other models.

I have all 3 S-40 schematics -- S-40, 40A and 40B; and I can't find any obvious difference between the 40 and 40A other than the 80 vs 5Y3.

The schematics came from a CD that I bought on eVilbay a long time ago.  I don't think all 3 -- actually there were 4, because it also included the "mil-spec" original S-40 manual -- were on BAMA when I got it; and the scans are better than BAMA.  But I think they are now all on BAMA.

(All Halli's manuals should have been as good as that original S-40 book... oh well.)

The 40B has some definite electrical, and mechanical differences from the earlier models; for one thing, it has one less tube.

The S-40 actually is a reasonably decent radio; except it's broad as a barn door and a little deaf on the upper range especially by the time you get to 10 meters.  A Heathkit QF-1 Q multiplier plugged into the accessory connector on the back really does a lot for its selectivity.  A preselector, maybe an RME DB-23, in front of it would materially boost the sensitivity.  And then you'd have enough knobs to keep you very busy!

73

Mike
W4DSE




More information about the Hallicrafters mailing list
This page last updated 18 Mar 2024.