{"id":591,"date":"2020-09-19T17:11:00","date_gmt":"2020-09-19T07:11:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2020\/09\/19\/soldersmoke-podcast-225-mars-usdx-g-qrp-hp8640b-dx-390-rotary-tools-walla-walla-sdr-mailbag\/"},"modified":"2025-07-20T13:23:15","modified_gmt":"2025-07-20T03:23:15","slug":"soldersmoke-podcast-225-mars-usdx-g-qrp-hp8640b-dx-390-rotary-tools-walla-walla-sdr-mailbag","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2020\/09\/19\/soldersmoke-podcast-225-mars-usdx-g-qrp-hp8640b-dx-390-rotary-tools-walla-walla-sdr-mailbag\/","title":{"rendered":"SolderSmoke Podcast #225: Mars, uSDX, G-QRP, HP8640B, DX-390, Rotary Tools, Walla Walla SDR, MAILBAG"},"content":{"rendered":"<\/p>\n

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SolderSmoke Podcast #225 is available<\/b><\/p>\n

http:\/\/soldersmoke.com\/soldersmoke225.mp3<\/a><\/b><\/p>\n

Mars, West Coast smoke.<\/b><\/p>\n<\/p>\n

Pete’s Activities: <\/b><\/div>\n
— DC receivers.<\/b><\/div>\n
— CW offset<\/b><\/div>\n
— GQRP talk<\/b><\/div>\n
— The uSDX project<\/b><\/div>\n

<\/b><\/div>\n
Bill’s Bench<\/b><\/div>\n
— Sliding into the Vintage Test Gear Cult: HP8640B . <\/b><\/div>\n
— Fixing up and figuring out Radio Shack DX-390 receivers. <\/b><\/div>\n
— 220 to 110 on a few remaining devices. <\/b><\/div>\n
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— Got myself a Dremel-like rotary device. <\/b><\/div>\n<\/div>\n

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Tech News: <\/b><\/div>\n
— ARRL\/TAPR Convention: SDR project from Walla Walla University students. Intuitive explanation for why desired and image freqs in a mixer come out with very useful phase differences. <\/b><\/div>\n

<\/b><\/div>\n
— Chuck Adams’ Amazing Lab Notebook. Includes a simple circuit to measure resistance and Q in crystals. FB. <\/b><\/div>\n

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MAILBAG: <\/b><\/div>\n

<\/b><\/div>\n
— Dino KL0S SITSing in his shack, homebrewing 9 MHz filters FB Dino. Airborne! <\/b><\/div>\n
— Dave NT1U sent us the famous 1968 QST Article by W7ZOI re DC RX. <\/b><\/div>\n
— Ron K0EIA listening to SWBC staions with uBITX. <\/b><\/div>\n
— Ted AJ8T Korguntubes making a 12AX7 equivalent. <\/b><\/div>\n
— Joel N6ALT sent me a nice DX-390 manual. Thanks Joel<\/b><\/div>\n
— Bob KD8CGH alerted us to the uSDX project — story on the blog. <\/b><\/div>\n
— Craig AA0ZZ Sent a great message with insights on computer code — I will put up on the blog. <\/b><\/div>\n
–Tracy KN4FHX reports on optimistic prognosis for SolarCycle 25. Some chickens may have to be sacrificed. <\/b><\/div>\n
— Stephen M0OMO Thanks SolderSmoke for rekindling interest in this hobby. <\/b><\/div>\n
— Paul VK3HN has a cool new rig — The Prowler — check it out<\/b><\/div>\n
— Steve N8NM working on his Sunbeam car — Pete already knew about the carburetor synch problem. N6QW knows everything. <\/b><\/div>\n
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SolderSmoke Podcast #225 is available http:\/\/soldersmoke.com\/soldersmoke225.mp3 Mars, West Coast smoke. Pete’s Activities: — DC receivers. — CW offset — GQRP talk — The uSDX project Bill’s Bench — Sliding into the Vintage Test Gear Cult: HP8640B . — Fixing up and figuring out Radio Shack DX-390 receivers. — 220 to 110 on a few remaining … Continue reading “SolderSmoke Podcast #225: Mars, uSDX, G-QRP, HP8640B, DX-390, Rotary Tools, Walla Walla SDR, MAILBAG”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":592,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118,116,35,66,192,41,34,197,196,40,49,198,71,195,79],"tags":[],"class_list":["post-591","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-adams-chuck","category-cw","category-direct-conversion","category-farhan","category-gqrp","category-juliano-pete","category-mixer-theory","category-parent-allison","category-qcx","category-sdr","category-soldersmoke-podcast","category-summers-hans","category-test-gear","category-usdx","category-workbench"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/591","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=591"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/591\/revisions"}],"predecessor-version":[{"id":595,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/591\/revisions\/595"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/592"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=591"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}