[Boatanchors] [homebrew-dual-sideband:131] 6360s, 7360 equivalents and DSB & SSB respectively plus OT Network attached storage

[Kludge]

From: homebrew-dual-sideband at googlegroups.com
[mailto:homebrew-dual-sideband at googlegroups.com] On Behalf Of Ian Wilson
The original beam-deflection tube was, I believe, the 6AR8.
This was followed by improved versions such as the 6JH8, 6ME8, 6HW8.

 

The 6JH8 was previously mentioned.  Thanks for the added types – more to
look for.  :-)

 

Looking at the data sheets it has always seemed to me that most of
these tubes appear to be more linear than the 7360. However, they operate
on higher voltages so this may be an unfair comparison.



Since I don’t have anything using one of this type of tube on the boards
yet, I’m pretty open about power.  

 

It’s a safe bet that everyone here has significantly more experience &
knowledge about sideband (and experience with AM) than I do since my ham
career has been CW only up to now.  As a result, I’m a serious learning mode
at the moment and will ask a lot of really stupid questions.

 

It also seems to me that if you are using these tubes as high-performance
front-end mixers then for more linear operation you should apply the signal
in push-pull to the deflection electrodes, and apply the LO to the control
grid. However, this isn't balanced with respect to the LO - a significant
advantage of applying signal to g1 and push-pull LO to the deflectors.



And here we go with some of those stupid questions.  

 

Remembering the sideband generators in some of the early Handbook designs
using 7360s, the signal was applied to G1 and push-pull audio to the
deflector plates.  It seems to me that this would be true of use as a mixer
elsewhere (substituting LO or some other similar signal for audio) in a
sideband transmitter-receiver as well, or am I missing something?

 

Getting back to the 6360, this tube has two almost independent tetrodes with
the screen grids in common between them.  I’ve used this tube in the past
and like it but then I never was interested in sideband operation before.
The idea of feeding a brace of tetrodes in push-pull with signal on the
control grids and audio on the screen grids then paralleling the plates for
DSB is interesting and is one way in which I’ll abuse at least one of my
829Bs or 5894s.  However, it’s also impossible with the 6360.  Is there any
way to use this little gem as a SSB or DSB generator using some combination
of inputs and outputs that allows for the fact that the screen grids are
tied together or should I stick with what I know, using it as a class C amp?

 

Best regards,

 

Michael, WH7HG BL01xh
http://www.nationalmssociety.org/chapters/NTH/index.aspx 

http://wh7hg.blogspot.com/ 
http://kludges-other-blog.blogspot.com
<http://kludges-other-blog.blogspot.com/>  
Hiki Nô!