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Oct. 10 2014

ENGINEER BOB’S RADIO GALLERY IS BACK!

By Bob Lenio | Posted in Staff Blogs | 2 Comments

IMG_20141009_110831This radio is a GLF model F-770, circa 1948.  GLF stands for Grange League Federation, which was a farmer’s co-op in upstate New York.  In the late forties, the Grange League Federation founded six FM stations in upstate New York and formed the Rural Radio Network to serve farming communities.   They marketed these well-built 10 tube AM/FM radios that were designed for long distance reception.  Although the radio looks European in appearance, it is built with standard American parts and displays “Made in USA” on the bottom label.  I found this radio in an antique store in Northeast Pennsylvania.  I plugged the set in at the store, and the store started filling up with smoke and the stench of a burning transformer.  Needless to say, this caused the price of the radio to drop drastically!  Soon after, I was lucky enough to find a donor GLF F-770, that had a less needy chassis, but poor cosmetics.  IMG_20141009_110854This radio is the result of the best parts of the two.  I recapped this radio and replaced a couple of tubes.  It plays ok, but still is not what it was in its glory.  Since this radio was probably a one-off built- to-order design, there is no technical data for it floating around.  I’ll take this one to the next level once the schematic and alignment instructions are available.

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Bob Lenio

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Bob is WBJC's Chief Engineer. If you have a question about signal reception, equipment or the website streaming, you can contact Bob at blenio@bccc.edu or 410-580-5800.

2 Responses to ENGINEER BOB’S RADIO GALLERY IS BACK!

  • Guy Riffle says:

    Very nice work, Bob! Keep it up and let us know how it progresses. I admit I thought it was a Grundig – not as experienced an eye. I do have an old Philco floor model in my bedroom that I need to recap, and it would be nice to find some appropriate grill cloth. My father and I replaced the speaker years ago – the power supply choke was the electromagnet for the speaker, and I sometimes regret the change – Quite great sound at the time, I would now recone it. I’m also a member of a local audio DIY club (DC Audio DIY) and we have fun building audio gear that betters most commercial (hi-end) gear. Keep this up – I love your column!

  • Robert Blackshaw says:

    Congratulations Bob, it is great to see these restorations of vintage gear that might otherwise end up in landfill I happily have a Pioneer RT-707 reel to reel tape machine made from two dead units.

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