I¡¯m currently working on a UL3s for 10 meters and decided to solder in BS170s in the remaining slots and the output power actually went way down. ?Is this due to parallel capacitance adding up to the point that it is no longer tuned well for 10 meters? If I want to get to 3 or 4 watts with it is my best option to add an external amp? If necessary Ive got several old CB radios that I can hack and drive the driver amp with a single BS170. I¡¯ve also got a few IRF510 and IRF511 around, the latter which is out of production.
Thanks,
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On Sep 22, 2023, at 8:02 AM, wb2cba@... wrote:
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Hans,
As one of the 0.1% thank you for the encouragement to experiment on QDX. I was fearing to upset you with my QDX PA mod though it¡¯s just an innocent alternative PA test on QDX just to see what will be the outcome. Then I shared my experimentation with community as I always do.
As a fan of BS170 and using it in all my own rigs I can¡¯t agree more of your thoughts on BS170. You are absolutely right.
73
Barb WB2CBA
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