27-02-2017, 08:55 AM
Another method of oscillator injection to a pentode mixer was via the pentode's screen grid as in the legendary HRO receiver, one of the best comms receivers that was made in the 1930's:
https://images.campyent.com/sites/defaul...pg17-1.png
Lawrence.
https://images.campyent.com/sites/defaul...pg17-1.png
Lawrence.







