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Re: Mk II Scratch-build May 2018 -- some questions

 

Andy, things have moved along, the problem I was having appears to have been due to using an unshielded speaker/mic, I've ditched that, added an inbuilt mic, added shielding, and set the mic amp gain low. It's working, although there is still a bit too much carrier leakage thru the exciter and into the PA. However much better.? Will post a blog entry and video soon.? Regards Paul VK3HN.?


On Sat, 8 Sep. 2018, 20:43 g6lbq via Groups.Io, <ah.electronics=[email protected]> wrote:
Hi Paul

One quick question, are you sure that the carrier oscillator is aligned correctly, poor alignment and you may be experiencing some leakage.

Did you match your crystals for the SSB filter ?

I doubt that the MMBT3904 transistors are causing a problem.

Sorry I am late in jumping in on the thread but due to ongoing family health problems I have not been active in the group but will read through the thread and see what else I can add.

Regards

Andy
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