[Heath] Grid-block keying mod to MT-1 transmitter

[Bob G3OOU]

Hi Dave

I have written a short generic article on grid block keying on my 
technical web site below if that might be of some assistance.

Look in the Valve Circuits Menu section.

I have used this tehnique with an SB-301/401 combo to achieve full break-in.

73

Bob

Bob F Burns G3OOU, G-QRP 6907, @BobFBurns
Crystal Palace Radio & Electronics Club:https://www.cprec.org/
Admin/sales site:http://www.g3oou.co.uk/
Technical site:www.qsl.net/g3oou

On 16/11/2024 18:06, David Thorne wrote:
>
> I inherited a Cheyenne MT-1 transmitterfrom a friend, now deceased.We 
> each built our ownMT-1/MR-1 combos in high schoolaround 1960.A bit 
> later my friendaddeda modification on the 6146 final that looks like a 
> change to grid-block keying.It would be possible of course, but 
> tedious, tofigure out visuallywhat was changed/added.I know this is a 
> longshot, but does anyone have any information/schematics that might 
> havebeen used to make this modification?
>
> Thanks,
>
> Dave
>
> K7KTB
>
>
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