{"id":10654,"date":"2023-10-19T14:29:00","date_gmt":"2023-10-19T03:29:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2023\/10\/19\/how-a-homebrewer-substituted-mpf102s-for-the-rs-2035-fets-in-the-herring-aid-5-who-built-this-one-any-others-out-there\/"},"modified":"2025-07-22T18:02:03","modified_gmt":"2025-07-22T08:02:03","slug":"how-a-homebrewer-substituted-mpf102s-for-the-rs-2035-fets-in-the-herring-aid-5-who-built-this-one-any-others-out-there","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2023\/10\/19\/how-a-homebrewer-substituted-mpf102s-for-the-rs-2035-fets-in-the-herring-aid-5-who-built-this-one-any-others-out-there\/","title":{"rendered":"How a Homebrewer Substituted MPF102s for the RS 2035 FETs in the Herring Aid 5 — Who built this one? Any others out there?"},"content":{"rendered":"<\/p>\n
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The Hamfest Herring Aid 5<\/span><\/div>\n

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For background on all this, see yesterday’s blog post: <\/b>https:\/\/soldersmoke.blogspot.com\/2023\/10\/a-big-error-discovered-in-1976-qst.html<\/a><\/b><\/p>\n

Rick WD5L noted that it was remarkable how the builder of the Herring Aid 5 that I found early in 2023 at a hamfest<\/a> had built his receiver using MPF102s at Q1 and Q5. Here is how this builder kind of “shoe horned” MPF 102s into the QST Herring Aid 5 boards. Pinouts for the MPF102 and the RS 2035 and the PC Board Pattern for the Herring Aid 5 appear below. <\/b><\/p>\n<\/p>\n

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