[GreenKeys] HAL literature on line

[Nick England]

Thanks to Ralph, W8ROI, I have just scanned and posted the following:

   - HAL Catalog Spring 1979
   <http://www.navy-radio.com/rtty/hal/hal-catalog-1979.pdf>
   - Let's Get on Frequency - How to Tune in RTTY Signals
   <http://www.navy-radio.com/rtty/hal/hal-on-frequency.pdf> by Bill Henry
   K9GWT
   - RF Induced Problems and Solid-State RTTY Terminals
   <http://www.navy-radio.com/rtty/hal/hal-rf-problems.pdf> by Bill Henry
   K9GWT
   - High Tones, Low Tones, Modem Tones - What Are They and What Do They
   Mean? <http://www.navy-radio.com/rtty/hal/hal-tones.pdf> by Bill Henry
   K9GWT
   - RTTY Demodulators - You Can't Work 'em If You Can't Hear 'em
   <http://www.navy-radio.com/rtty/hal/hal-demodulators.pdf> by Bill Henry
   K9GWT
   - ASCII, Baudot, and The Radio Amateur
   <http://www.navy-radio.com/rtty/hal/hal-ascii-baudot.pdf> by Bill Henry
   K9GWT

http://www.navy-radio.com/rtty/hal/hal-catalog-1979.pdf
http://www.navy-radio.com/rtty/hal/hal-on-frequency.pdf
http://www.navy-radio.com/rtty/hal/hal-rf-problems.pdf
http://www.navy-radio.com/rtty/hal/hal-tones.pdf
http://www.navy-radio.com/rtty/hal/hal-demodulators.pdf
http://www.navy-radio.com/rtty/hal/hal-ascii-baudot.pdf

Cheers,
Nick England K4NYW
www.navy-radio.com
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