{"id":1403,"date":"2011-01-02T11:44:00","date_gmt":"2011-01-02T00:44:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2011\/01\/02\/a-blast-from-the-past-the-hammarlund-hq-100\/"},"modified":"2025-07-21T11:23:03","modified_gmt":"2025-07-21T01:23:03","slug":"a-blast-from-the-past-the-hammarlund-hq-100","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2011\/01\/02\/a-blast-from-the-past-the-hammarlund-hq-100\/","title":{"rendered":"A Blast from the Past: THE HAMMARLUND HQ-100"},"content":{"rendered":"

\"\"<\/a>I’m sitting here in the shack at 0645 EST on the first Sunday morning in 2011. Coffee is on. And so is my OLD Hammarlund HQ-100. I have it tuned to a friendly AM roundtable on 75 meters. And it sounds GREAT. Nothing like a receiver that is as broad as a barn door to let you appreciate that great AM sound. <\/span><\/p>\n

This receiver and I have some history. I bought it in the Dominican Republic, probably in 1993, probably from my friend (now SK) Pericles Perdomo. It had suffered the ravages of the Dominican radio environment from both ends: I think I found signs of a lightning surge at the front end, and of a power surge at the AC input. The audio output transformer was bad also. This was one of my first tube-type renovation project. I had a lot of fun with it. <\/span><\/p>\n

There are no crystal filters in this receiver. If you want to narrow it down, there is a Q-multiplier (so –yikes!– this receiver is at least in part a regen). In its original configuration the Q multiplier doubled at the BFO, but I guess my anti-regen feelings were at work even then: I took the 100 kc crystal calibrator and put a 453.5 kc crystal in there — so that calibrator now serves as the BFO. This seems much more civilized. <\/span><\/p>\n

You can see in the picture that the clock is gone. Mine was in pretty sad shape when I got it. Plus I thought it looked kind of goofy in that otherwise very beautiful front panel. So I took the clock out, patched the hole, and gave the clock to a very grateful Hammarlund collector. <\/span><\/p>\n

The AM really sounds great. I can see that I’m going to need a 75 meter dipole so I can match this receiver up with my DX-60 VF-1 combo. <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

I’m sitting here in the shack at 0645 EST on the first Sunday morning in 2011. Coffee is on. And so is my OLD Hammarlund HQ-100. I have it tuned to a friendly AM roundtable on 75 meters. And it sounds GREAT. Nothing like a receiver that is as broad as a barn door to … Continue reading “A Blast from the Past: THE HAMMARLUND HQ-100”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1404,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19,176,100],"tags":[],"class_list":["post-1403","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dominican-republic","category-hammarlund","category-old-radio"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1403","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=1403"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1403\/revisions"}],"predecessor-version":[{"id":1405,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1403\/revisions\/1405"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/1404"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=1403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=1403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=1403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}