[Milsurplus] WWII Navy RAL-8 Receiver Project

[Richard]

Re:

On 7/7/19 4:34 PM, Hubert Miller wrote:
>
> I ask, why is it desirable to improve the high end audio response of 
> the RAL receiver ?
>

It's a matter of taste.  I think it just sounds much better. It's nice 
to hear whatever is going on in the neighborhood, and when the low-pass 
filter is switched in everything else disappears.  CW is excellent, SSB 
has excellent clarity, and SWBC is merely OK.  I think you're better off 
with a superhetrodyne for short wave broadcast.  Clearly the RAK came 
first, and was designed to perfection; there is nothing you can do to 
improve an RAK.  I think the limited audio amplifier frequency response 
was necessary for stabiity, as there isn't much difference between radio 
frequencies and audio frequencies at the bottom end.  I also have an RCA 
AR-8510 maritime receiver, and they warn to keep gain low at the bottom 
end for stability.  The RAL came second, and they carried over as much 
as possible without harming it's mission, which was CW reception.  They 
also probably had to satisfy some bean counters - you have to give them 
something...

Richard, AA1P







































ak

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20190707/cde94c57/attachment.html>