[ARC5] SG Keying of ARC-5 Tx

[Mike Everette]

Why not use the original "selector" circuit with the underchassis relay, which keys the oscillator plate and amplifier cathode?
Be sure the section of the .05 uF capacitor used as a bypass in the oscillator plate feed is good!
73
Mike
WA4DLF

      From: Kenneth G. Gordon <kgordon2006 at frontier.com>
 To: ARC5 at mailman.qth.net 
 Sent: Saturday, November 19, 2016 7:27 PM
 Subject: Re: [ARC5] SG Keying of ARC-5 Tx
   
On 19 Nov 2016 at 22:29, Tom Bridgers wrote:

> Here's a link to the GE Ham Tips article from the 1950's about improved SG keying:
> 
> https://goo.gl/photos/MK1iUqzAjmpfweTN9

That is a good circuit, but keying should be done by a relay, not a key. Voltage on the key 
can be has high as the screen voltage, which for a pair of 1625s, can be almost 300 VDC.

Keying relays are cheap. One could use a MOSFET in fact.

Ken W7EKB

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