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ADT 6m experiments

Adam Rong All Messages By This Member #5182 Guys, I did some experiments to convert ADT to 6m and the result was very positive. With a modified filter board, I got near 150mW output which is not bad. The filter is simple but effective. -- Thanks, Adam Rong
Nigel Young ZL1NAY All Messages By This Member #5185 Well done Adam, I was considering doing the same with my original board. I would be interested to know which transistors you tried for the finals. I can't think of any small package through hole that would push 150mw at vhf, i did do some experiments using CB radio finals in class E driving it with a sig gen. Didnt get as far as a filter though. Nigel ZL1NAY? Best Regards, Nigel Young toggle quoted message Show quoted text On Mon, 28 Apr 2025, 2:13 am Adam Rong via , <rongxh=[email protected]> wrote: Guys, I did some experiments to convert ADT to 6m and the result was very positive. With a modified filter board, I got near 150mW output which is not bad. The filter is simple but effective. -- Thanks, Adam Rong
Adam Rong All Messages By This Member #5186 开云体育 Hi Nigel, I didn't use the through hole part. Instead, I used the C3357 SMD which is ideal for 5V. Thanks, Adam 在 2025/4/28 1:15, Nigel Young ZL1NAY via groups.io 写道: toggle quoted message Show quoted text Well done Adam, I was considering doing the same with my original board. I would be interested to know which transistors you tried for the finals. I can't think of any small package through hole that would push 150mw at vhf, i did do some experiments using CB radio finals in class E driving it with a sig gen. Didnt get as far as a filter though. Nigel ZL1NAY? Best Regards, Nigel Young On Mon, 28 Apr 2025, 2:13 am Adam Rong via , <rongxh=[email protected]> wrote: Guys, I did some experiments to convert ADT to 6m and the result was very positive. With a modified filter board, I got near 150mW output which is not bad. The filter is simple but effective. -- Thanks, Adam Rong
Nigel Young ZL1NAY All Messages By This Member #5187 Ahh ok Adam, i do have some of those, i shall give it a try. Cant remember what the cutoff frequency?was for those, think its 500Mhz. Before i was experimenting in class E with mofets, i couldnt get reliable results with transistors. Maybe it was my loading coil not right. Thanks again for your work on this. 6m is the only band i have nothing for. There are no kits apart from the six box. Would be cool to see some activity in this area of our bands with qrp. Nigel ZL1NAY? Best Regards, Nigel Young toggle quoted message Show quoted text On Mon, 28 Apr 2025, 10:22 am Adam Rong via , <rongxh=[email protected]> wrote: Hi Nigel, I didn't use the through hole part. Instead, I used the C3357 SMD which is ideal for 5V. Thanks, Adam 在 2025/4/28 1:15, Nigel Young ZL1NAY via 写道: Well done Adam, I was considering doing the same with my original board. I would be interested to know which transistors you tried for the finals. I can't think of any small package through hole that would push 150mw at vhf, i did do some experiments using CB radio finals in class E driving it with a sig gen. Didnt get as far as a filter though. Nigel ZL1NAY? Best Regards, Nigel Young On Mon, 28 Apr 2025, 2:13 am Adam Rong via , <rongxh=[email protected]> wrote: Guys, I did some experiments to convert ADT to 6m and the result was very positive. With a modified filter board, I got near 150mW output which is not bad. The filter is simple but effective. -- Thanks, Adam Rong

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