Thursday, March 26, 2015

STANCOR 10P TRANSMITTER: UPDATE 12

     A very long time in coming, I did make progress on the Stancor 10P, getting as far as power supply:

     Rectifier heaters and HV, filter caps, filter choke and bleeder.  It's a little crowded and I struggled to solder the capacitor and resistor to the chassis, even with the big iron.

     That work had it almost done, so tonight I added a few more things:
     Installed output feedthroughs and connected the output, wired up the primary power and the meter.

     Top view:

     Rear view:

     Front view:
     Initial tests -- just power-up, check for excessive current draw, check B+ -- went okay.  Hoping to try more by the weekend.

Thursday, January 29, 2015

YANKEE RADIO TOOL KIT, #106

     Some time ago, I chanced on a nice Yankee No. 100 tool set.  Readers suggested I keep watch for a No. 106 boxed set of "radio tools," which, other than a soldering iron or copper, contains about everything you'd need to build a 1920s-type radio -- and is plenty useful on later equipment.
     I have seen a few come and go at princely prices, including a lovely store display version.  They are fine tools but not on my budget.  Or not until some months ago, when a slightly-grubby one showed up on a well-known auction site.  The serious collectors weren't after it but many of the tools were there; it was hard to figure out what was going on with the little drill, which appeared to have been taken apart.  The wooden case is the most difficult part to find -- the No. 105 kit offered all the tools except the drill, at half the price and in a cardboard box -- and the case was certainly there.
     It arrived in disappointingly worse shape than the original listing showed, due to a poor packing job.  Adjustments, as they say, were made.
     The mystery of the disassembled drill was simple enough: it was the wrong drill.  This proved no hardship; the little Yankee "Radio Drill," No. 1431, is commonly found and inexpensive.

     At present, I am repairing the case, starting with the badly cracked bit holder.  The two long screwdriver blades are missing, as is the uncommon Ratchet Tool Holder No. 230.  They may be a very long while in the finding.
     The incorrect drill is nevertheless a treat: a No. 1530 Ratchet Drill, which can be set to operate in five different modes: plain, left-handed ratchet, right handed ratchet, right-hand double, or locked.  The last is handy when tightening or loosening the chuck, the simple ratchet modes only respond to one direction of turning the crank -- but "double" turns the chuck clockwise no matter which way the crank is turned! 

Thursday, May 29, 2014

OLD-STYLE COVER FOR A MODERN LOG

     It is modeled after one published by Bud in the 1930s:
     I'm not too unhappy with how it came out.

Wednesday, May 28, 2014

PORTABLE-MOBILE LOGBOOKS FOR AMATEUR RADIO

     Any more, hams are not required to keep logs - but it is nice to have a record of who you heard from, and when.  Here are a couple for portable and mobile operation -- Field Day is coming up!
      The upper one is an ARRL original, found at a well-known online auction site.  The lower is one I made when I took a ham station along on an extended out-of-town trip.
     ARRL version is "shirt pocket" size, 6¼" by 4".  Mine is 8½" by 5½", trimmed from standard-size pages with one cut.

Saturday, May 17, 2014

TELEGRAPH KEYS AT 2014 DAYTON HAMVENTION

     A selection of old keys -- and one new one -- from the Dayton Hamvention:
"Pendograph," with a base-supported vertical pendulum for forming dits.

Pendograph close-up.  The owner let me try it -- very nice feel.  It's a "release of tension" design like the Mecograph: the reed is flexed at rest, and released to vibrate when you work the left paddle.

"Automorse," an Australian-made fully-automatic mechanical key.  Full-auto for International Morse, as used on radio, anyway:  the third paddle is for the long dahs of landline Morse, and that's manual.

This is a Mecograph, one of two versions.

The original machine for live coverage of news -- cut into the nearest telegraph wire and get to sending! You see these in old photos of press coverage of sporting events and Presidential appearances.


Sounders!

A full-auto, all-mechanical key built by Indy's own brilliant Richard Meiss. He knows more about the physics of bug keys than any man alive. This key is palm-sized, and uses a mechanically-varied mass to switch between dits and dahs.

Sunday, February 16, 2014

LETTERING GUIDE

     No copyright -- and no wonder; if you want to use these fonts, you're going to need a set of Speedball pens! 
      Full-size, this is a large image, intended for your use when lettering by hand.  The 16th Edition "Speedball Text Book - Lettering - Poster Design - For Pen Or Brush" that accompanied it, you'll have to find for yourself. It's a delight from another century, a succinct guide that presumes the reader has a modicum of talent or the patience to get the job done the hard way.  They're on to the 23rd ed. now; it would be interesting to see how much has been kept.

Wednesday, December 25, 2013

TYPEWRITER FONTS

     Richard Post offers a wonderful collection of free, downloadable typewriter fonts at his site!  Royal's "Vogue" font is very similar to the typefaces used for labeling on some Millen ham radio gear.