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![]() "John KD5YI" wrote in message news:jFOnj.10273$fs4.5137@trnddc02... "Suzy" not@valid wrote in message ... Can anyone point me to a website where a home built 70 cm reflectometer or 70 cm field strength meter can be built -- not using surface mount components. Thanks. How about an SWR meter with no surface mount components? See: http://www.qsl.net/xq2fod/Electron/swr/swr.html Have fun! John Thanks for that. I really want to emulate a throughline (like the Bird 43 I once had) and am thinking more in the terms of a stripline on PCB (using BNC), with parallel lines to sniff the RF and diodes to convert for the meters. But what I'm usure of is the sort of dimensions I should use for 70 cms, and wther these are critical. How long should the stripline be, what spacing and so on, so that it doesn't in itself introduce errors and misleading results. The sort of thing I would imagine would be in the ARRL handbook, but I want to avoid the expense of buying the book if it's not in there at all. BTW, most of the designs I've seen are HF or for up to 2 meters at the highest. I specifically want 70 cms, 435 MHz to be exact. |
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