Digital Drive control

Glenn
 

Attached is an idea that might work nicely for a drive control that can be varied in software by the NANO on a band by band basis.

The original drive control, RV1, is removed and a few parts added, along with a digital pot (I2C control) in place of R3 below  to form an attenuator in the RF path.

With some careful work it should be possible to design a small PCB that fits into the holes vacated by RV1, either vertically or horizontally.

(the schematic is from page 62 of the book by Randy L. Henerson on designing a Transveiver. Its avery old book (1997)   ISBN  0-07-028263-3)
glenn
vk3pe

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