JohnG3PQA
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- JohnG3PQA
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Hi Martin, Many thanks for all the info., sounds as if you have built a lot of these loops and noted about the higher Z input needed at higher HF frequencies. Not had time to finish the loop yet to try the preamp., but if the gain dropoff of the We…
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I have just made a Wellgood preamp using the published design and found the same problems: the transistors overheat, and the transformers are difficult to wind, particularly T1. I overcame the problems partly by adjusting the components rather than…