[600MRG] Homebrew Tube Transmitter

Goody K3NG goody.k3ng at gmail.com
Wed Jan 31 07:42:19 EST 2018


Thank you everyone for the responses!  I'm overwhelmed with all the useful
feedback.  This is a great group.

On Sun, Jan 28, 2018 at 8:55 AM, Goody K3NG <goody.k3ng at gmail.com> wrote:

> Greetings.  I've had on my to do list this tube rig project:
> http://www.qsl.net/wd8das/dream.html .  It's a 40 meter CW transmitter
> with two 807s.  It would be my first tube rig project.
>
> I'm now thinking instead of building this for 40 meters, a band for which
> I naturally have numerous rigs in the shack, building it for 630 instead.
> This would kill two birds with one stone, build a tube rig and get on 630.
>
> Any thoughts on converting this rig to 630?  I'm going to figure out some
> way around using a crystal.  For the rest of the rig, could I simply scale
> the various band specific components, like the oscillator tank and the PA
> output pi network?  Presumably the plate choke will need to be a
> considerably higher value?  Perhaps also put in 0.1 uF caps where there are
> 0.01 uF bypass caps?
>
> 73
> Goody
> K3NG
>
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