[AMRadio] RE 75A4 and other old gear


Carl Yaffey yaff at columbus.rr.com
Fri Nov 20 10:46:45 EST 2009


Jim, That's like lifting up the radiator cap of a Chevy and slipping a Porsche under it!

On Nov 20, 2009, at 10:42 AM, JAMES HANLON wrote:

> I have my original HRO-50, purchased new from Steinburgs in Cincinnati in the summer of 1950 (thanks, Dad!).  It's had a few mods over the years, like a pair of mechanical filters and a tee-notch, a product detector and audio derived avc, saturated reactor filament regulation for the local oscillator, mixer, and bfo, a noise limiter ala the NC-303, and a calibrator that gives me markers at 100 kc, 50 kc, 25 kc, or 10 kc.  I also put a muffin exhaust fan on the back that materially reduced the warm-up drift.  It's still my favorite, go-to receiver.  
> 

Carl Yaffey  K8NU
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cyaffeyNO_SPAM at gmail.com 
614 268 6353, Columbus OH
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