Re: BAY96 70cm to 23cm trippler minutarization

It is not clearly shown in the picture but the diode is mounter to a copper plate that is connected to the outer copper tube. This serves as a good ground but also as a heatsink.
I will try to make the connection of the coaxial as close to the diode as possible. Maybe I will also cut the long anode pin of the diode to a shorter length and mount the central conductor of the coaxial there.

I bet why All power diode converters used that diode. There was a reason for this!

I have found another power diode for the purpose ../imgqa/eboard/Antenna/rf-p400nper0ug.png
It uses an MA4060D but I cannot find any sources for it as well.

With 1W maximum RF drive I would guess around 0.75W would be lost as heat so the temperature would be 'hot' rather than 'cooking' so I would assess the risk of meltdown as quite low, especially if it can be soldered to the pipe. What I can't see is that 1.3GHz input filter, the TX is fed straight to the diode and I still think that will sink most of the wanted RF back to the TX output stages. Ideally you want something like this:

70cm TX ---> 1.3GHz blocker ---> diode ---> 1.3Ghz pass filter ---> 1.3Ghz antenna.

Brian.

I will do the test first with the TX connected directly to it, to see how much power can I get out.
Now that I search more, I see there other power devices. Apart from my previous post, I found anothet one http://www.seekic.com/uploadfile/ic-...1525445619.gif



Some more power diodes.
It seems the BAY96 is not the only one. In fact as Brian said at the beginning this has quite a high capacitance.