{"id":6333,"date":"2011-12-30T11:40:00","date_gmt":"2011-12-30T00:40:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2011\/12\/30\/back-to-the-barebones-receiver-2\/"},"modified":"2025-07-21T20:45:23","modified_gmt":"2025-07-21T10:45:23","slug":"back-to-the-barebones-receiver-2","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2011\/12\/30\/back-to-the-barebones-receiver-2\/","title":{"rendered":"Back to the Barebones (Receiver)"},"content":{"rendered":"

\"\"<\/a>My rehabilitation of homebrew 17 meter gear from the last solar cycle continues. Following the same path that I followed in 2001-2002, I will now move from DSB to SSB. I pulled out the little receiver that I put together w<\/span><\/span>ay back when. It is a version of Doug DeMaw’s “Barebones Superhet” (aka “Barbados Superhet”). I bought it on the net. It had been put together by a skilled builder on a FAR Circuits board. The fellow who built it had changed the IF from Doug’s original color burst freq (3.579 MHz) to 5 MHz. He had also put in a varactor controlled VFO using a DC voltage multiplier to get more voltage variation across the varactor. I also think he had it built for 20 meters. <\/span><\/p>\n

I converted it to a 17 meter receiver. I put in a VXO, using two crystals controlled by a panel switch. I also changed the caps in the filter so as to broaden the response for SSB. <\/span><\/p>\n

As I was going through all these modifications, I turned to the USENET for help and advice. Dale, W4OP, came to my assistance. Little did we know how DETAILED his familiarity with my RX was: <\/span>
<\/span>
“Bill N2CQR MOHBR” …<\/a>@virgin.net> wrote in message<\/p>\n

news:22f6e3ee.0503292244.1b9a1481@posting.google.com<\/a>…<\/p>\n

> Dale: Wow, another Barbados RX builder. That was my first successful
> superhet<\/b> project. I now have the one I built (still on 20), and this
> morning
> I got another one (the one built by someone else on a factory-made
> board)going on 17 with a VXO. I have a THIRD partially built Barbados
> RX board. If this
> keeps up, I’ll soon have a BBRX museum.
>Hi Bill,<\/p>\n<\/div>\n

Did I sell you mine years ago? I seem to recall using a temp stabilized
varicap in a shielded enclosure for main tuning. It was done on a factory
board. Or was that a 6M xverter I sold?<\/p>\n

Dale<\/p>\n\n\n\n
<\/td>\n\n
\n
\n
\n
\n
\n
Newsgroups: rec.radio.amateur.homebrew<\/b><\/div>\n
From: meara.lon…<\/a>@virgin.net (Bill N2CQR MOHBR)<\/b><\/div>\n
Date: 30 Mar 2005 22:33:57 -0800<\/b><\/div>\n
Local: Thurs, Mar 31 2005 1:33 am <\/b><\/div>\n
Subject: Re: Homebrew projects<\/b><\/div>\n<\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
Dale: Wow, small world! Yea I think that is the one I’m working on. I think
you also had a DC-DC converter to bring the voltage to the varicaps up.
Very nice enclosure for the oscillator. I now have it percolating nicely
as a VXO around 23 Mhz (for the 17 meter band). Bill<\/p>\n

<\/p>\n

– Hide quoted text –<\/div>\n

<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\"<\/a>Our book: “SolderSmoke — Global Adventures in Wireless Electronics”http:\/\/soldersmoke.com\/book.htm<\/a>Our coffee mugs, T-Shirts, bumper stickers: http:\/\/www.cafepress.com\/SolderSmoke<\/a>Our Book Store: http:\/\/astore.amazon.com\/contracross-20<\/a><\/meara.lon><\/p>\n","protected":false},"excerpt":{"rendered":"

My rehabilitation of homebrew 17 meter gear from the last solar cycle continues. Following the same path that I followed in 2001-2002, I will now move from DSB to SSB. I pulled out the little receiver that I put together way back when. It is a version of Doug DeMaw’s “Barebones Superhet” (aka “Barbados Superhet”). … Continue reading “Back to the Barebones (Receiver)”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":6334,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-6333","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-demaw-doug"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/6333","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=6333"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/6333\/revisions"}],"predecessor-version":[{"id":6336,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/6333\/revisions\/6336"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/6334"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=6333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=6333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=6333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}