[Boatanchors] [homebrew-dual-sideband:129] 6360s, 7360 equivalents and DSB & SSB respectively plus OT Network attached storage

[Carl]

Look at a NCX-3 schematic, its 7360 was rather well behaved. For some reason 
the NCX-5 had severe carrier drift problems with it and they went with a SS 
diode upgrade.

Carl
KM1H


----- Original Message ----- 
From: "Ian Wilson" <ianmwilson73 at gmail.com>
To: <homebrew-dual-sideband at googlegroups.com>
Cc: <boatanchors at qth.net>; <tetrode at googlegroups.com>
Sent: Tuesday, November 02, 2010 10:26 AM
Subject: Re: [Boatanchors] [homebrew-dual-sideband:129] 6360s, 7360 
equivalents and DSB & SSB respectively plus OT Network attached storage


> The original beam-deflection tube was, I believe, the 6AR8.
> This was followed by improved versions such as the 6JH8, 6ME8, 6HW8.
>
> Some of the improvements were worthwhile (e.g. the 6AR8 was significantly
> microphonic). Other 'improvements' such as different base connections
> were probably intended to lock you into a particular manufacturer.
>
> 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.
>
> 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.
>
> 73, ian K3IMW
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