Saturday, February 25, 2012

Swan 350

Swan 350 circa 1966
This is a radio I have never used before.  The Swan 350 was a popular rig in the 60's and 70's.  I repaired this one for my friend John W3JOI and enjoyed using this rig.  The radio is an interesting design using a single crystal filter in the IF.  The radio is powerful and has a good sensitive RX.  I also got to use a D-104 mic for the first time.  This radio will pin my 200 Watt meter quite hard and gets good audio reports.  It only took a couple of tubes to get it going again.

I checked into the Swan Tech Net today and was told the S/N of this radio (C 618852) was manufactured in 1966 and that the radio was produced from 1964 to 1967.  This one was late enough to have the one piece xtal filter instead of sockets for the individual crystals that the early ones had.  During testing I measured the B+ ripple at about 3v.  Stu K4BOV said that the it should probably be less than 1v so the filters are a bit weak.  Stu suggested to use 80-220 mfd caps rated at, at least 350.

The Swan Tech Net is on Sat PM at 2:30-3:30 or so on 7235.  Check it out sometime if you are interested in these oldies.


CD said...

This was my first QRO radio. Purchased a dead one as a teen and got it back on the air for less than $100 total. Still have and use it, though it sat in a box for nearly 30 years and probably could use some sprucing up. Big power on some bands with new tubes.

CD said...

My first QRO radio (first radio was a HW-8). Purchased around 1979/80 from a ham in the next town who was going to art school in France and had to get rid of it. When I arrived, he couldn't get it to power up. Told him I couldn't buy it w/o knowing what was wrong. He told me he was leaving in 2 days and to make an offer. It went home with me for $50 including an Astatic D104 mic and matching speaker/power supply. Cost was another $50 to get it back on the air. Still have it and use it. Sat in storage for nearly 30 years until 2011.