[Milsurplus] RAK AND RAL RAB landed at SMECC anyone got a

[COURYHOUSE at aol.com]

Robert thanks for the  modification hints,
 
Yea  I  can see   the  how the lack of  AVC   would be an  issue.
 
Cant  wait to power them up  eventually!
 
 
Ed#
 
 
In a message dated 7/21/2016 7:57:59 P.M. US Mountain Standard Time,  
robert.h.goff at gmail.com writes:

As  others have said the RAK and RAL are excellent receivers.  Last
time I  checked the manuals were still available on BAMA.

I've had a lot better  luck with a homebrew regulated supply on both of
my RALs than with the big  black RCA power supply. Lowering B+ from 180
to 135 volts seemed to really  tame the regenerative detector and
eliminate microphonics.  I believe  I also changed the grid leak
capacitor from the original 500pf to 100pf or  so - more in line with
most other regen circuits you'll find in the old  magazines.

As an AM operator, the big drawback to the RAL (versus the  RBB, or any
other superhet) is the lack of AVC.  With one 300W station  within a
mile in our roundtable riding the regeneration and  sensitivity
controls is a must - better be on your toes, too.  On CW,  however, the
audio filters are extremely effective.  Also, the RAL  just seems
quieter than your average superhet.  It's still my go-to  when the
local noise gets bad.

I've logged a few NDBs with my RAK,  but I believe the longwave
broadcast is just about gone.  I recently  read the Voice of Russia had
cut back to just one station in the  Transcaucasus.  The megawatt-level
station on Sakhalin Island (now  closed) had been in operation since
the late twenties.  I'd really  love to see some pictures of that gear!

73,
de Robert  W7MKA
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