26-08-2020, 01:06 PM
I have not tried circuits much at the higher frequencies but that is more down to needs and the test equipment I have. Usually I find there are few issues as long as, mentioned previously, circuit layout is good. I have used stripboard for up to 50MHz but would be in the minority there. Manhattan Style for the frequencies you are talking would be far more reliable as Trevor says. One thing I have not seen mention of (unless I missed it) is to use RF amplifier design with inductance in the anode circuit. This would make a big difference. A previous topic I introduced does have some information and spreadsheet you may find useful (no guarentees but it does seem to work as the EF91 aerial amplifier I produced has been working well every day for a couple of hours or more since then - my most used project). Only low HF but varying the components in the spreadsheet will show you how much an inductance and anode resistor can vary response. From this it is easy to see why lower VHF response won't give good results: https://golbornevintageradio.co.uk/forum...p?tid=7708
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