The Heathkit VX-1 Electronic Voice Control

[@3vi1J]

Another awesome video. Thank you for sharing this info. I love learning about these old kits and you always provide an amazing amount of interesting details.

[@billfargo9616]

Modern solid state switching eliminates the need for hang time.

[@colinstu]

Why leave the selenium rectifier? isn't that a ticking timebomb?

[@jefftranter]

I would normally replace it with a modern silicon diode and dropping resistor, but I decided to leave it original as this Heathkit is quite rare and I don't plan to use it regularly.

[@mitchdmi]

Very cool!

[@thirstyCactus]

Would disconnecting the antenna from transmitter potentially harm the transmitter without proper loading?

[@jefftranter]

Yes, but when properly set up the VOX unit controls an antenna switch relay so that when transmitting the transmitter is connected to the antenna. It is okay for it not to be connected to an antenna when it is not actively transmitting.

[@thirstyCactus]

@@jefftranter Ah, that makes sense. Thanks for the reply and all the informative content!