John Byrns wrote:
In article , Patrick Turner
wrote:
John Byrns wrote:
In article , Patrick Turner
wrote:
John Byrns wrote:
In article ,
wrote:
Frank Dresser wrote:
I think the fact that the synchrodyne never became at all popular
as an AM
radio detector in the tube era means something. If I recall
correctly, I
read that synchrodyne detectors would howl until they sync'd.
Also, the
phasing would have to be perfect to get good demodulation from
normal double
sideband AM.
Now appearing on alt.binaries.pictures.radio
Syncrhodyne three tube receiver from the April 1951 edition of
Radio News.
Looks more like the article came from Radio Electronics than from Radio
News, no way of confirming the April 1951 date.
The synchrodyne schematic never appeared on ABPR
when I looked out for it.
Too bad, it's an Australian design from "down under".
Not all the postings of binaries are able to fit the pouches of the trained
kangaroo couriers who take binaries south,
from the north, to where they originated.
So the ABPR news group I see from my povety stricken ISP
often lacks the illuminations of the american views.
But this article gives the Australian view, being written by one John W.
Straede, who was a "Lecturer in electronics and electro-acoustics,
Melbourne Technical College, Australia."
There have been some bright Oz stars in the world of electronics over the years.
I have since recieved a copy of the synchrodyne from someone privately.
It basically uses two tubes to make the tuner, followed by a 6V6 audio output
and a there was a rectifier tube and has similarities to other
synchrodynes of the era, although it has a variable FB control
to the snyc tube oscilator-detector.
Its similar to another circuit I have.
I will have to scan and post a few for ppl soon.
These synchrodynes were slightly simpler circuits than a superhet
for the same number of tubes.
Patrick Turner.
Regards,
John Byrns
Surf my web pages at, http://users.rcn.com/jbyrns/