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Showing posts from April, 2018

2018 ~ The Year of SSB Transceivers

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5/6/2018 ~ Update
Here are some photos that have survived ....

The above photo is the "Officers" shower facility and the man near the right hand center of the photo is taking a "whiz" into an outdoor urinal. This device invented by the Seabees is comprised a 12 inch diameter piece of PVC pip sunk into the sand and that is it. I must admit that after a few drinks the 12" target was hard to hit and the same problem late at night.
The next photo taken in 1965 should conjure up thoughts of the movie and TV series "MASH" -- I think the movie stole our lifestyle. That is my rack in the corner of the hut. Please note that my 782 Gear is packed and at the ready. Oh there are those asking what is 782 gear. Well the Seabees worked closely with the US Marines and adopted many of their processes and procedures. The term 782 refers to the form used to delineate the field gear that a US Marine (or Seabee) is issued. Typically this is a pack, helmet, entrenching tool …

2018 ~ The Year of SSB Transceivers

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Building the W7ZOI, 20M SSB Transceiver4/10/28 ~ Comment: this rig is only one of three that I have built that is fully SSB and CW capable. with the other two being the KWM-4 and this rig's twin brother. Unless you provide capability for narrow signal filtering then operating CW using a wide SSB filter (700 Hz as compared to 2.1 KHz) does not make for a competition grade rig. OK for casual contacts; but not one for a true CW enthusiast. Today I would look at a diode steered two filter scheme and like in the KWM-4 and the W7ZOI rigs use a separate CW keyed crystal oscillator (or the third clock on the Si5351). 
Since I am not a CW enthusiast nor always QRP my main thrust is SSB and to have linear amps on the output. Hats off to those who like QRP + CW. There is room in the hobby for all.
73's Pete N6QW



In 1999, I decided to build the W7ZOI 20M QRP SSB Transceiver that appeared in a two part article 12/89- 1/90 in QST. [That was before contests and latest product reviews consumed so…

2018 ~ The year of SSB Transceivers

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The KWM-4 ~ A True Homebrew Rig.
Pete N6QW
Who is Doing What to What?
(No this is not about the Emperor and the Porn Star!)

I raise this question because I think it is a good idea to always look beyond what one is doing in their shack and to see what is over the fence. I am on a quest to build a complete 20M homebrew SSB transceiver within the confines of an Altoids tin. The last time I built a really small SSB rig it was 16 cubic inches (2X2X4). So now how to make it even smaller.
To that end I am firm believer to doing research on what others are doing, which lead me to K.P.S.Kang, VU2KR. He has a blog called http://smallwonderqrp.blogspot.com 
In the May, June and July of 2016 blogs there are entries regarding a rig he designed called the PIXET. This is an amazing design and it has many possibilities "built as is" as well as looking at the topology and how that could be incorporated into my "super small shirt pocket transceiver". Keep in mind there are always better m…