Welcome to AMATEUR RADIO STATION K9sth

Amateur Radio Station K9STH

Welcome to the amateur radio section of this website.  Please note that all files are in PDF format for downloading


History, Equipment, Antennas. projects

History of K9STH (pdf)

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Equipment_at_K9STH (pdf)

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Present Antennas at K9STH (pdf)

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Some Older K9STH Stations (pdf)

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More older K9STH Stations (pdf)

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Even More Older K9STH Stations (pdf)

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AR-3 restoration (pdf)

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Projects

Older Restoration Projects (pdf)

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More Restoration Projects (pdf)

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Even More Older Restoration Projects (pdf)

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Building a cabinet for a Collins 75A-1 (pdf)

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160-meter amplifier project (pdf)

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160-meter transverter project (pdf)

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AR-3 restoration (pdf)

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Rebuilding a trashed BC-312 receiver (pdf)

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Test / Work Benches at K9STH (pdf)

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Boat Anchor Paint Formulas

Paint Formulas for Various Boat Anchor cabinets (pdf)

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General Information

Explanation of Decibel Relationships (pdf)

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FCC Interference Study White Paper (pdf)

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Using TV Baluns With HF Receivers (pdf)

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Vertical / horizontally rotated 10-meter or 6-meter Antenna (pdf)

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6146 Family of Tubes

The 6146 Family of Tubes (pdf)

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Collins Radio Equipment

Improving 75S-3- Receiver CW Performance (pdf)

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Repairing the Ceramic Trimmers Used In Collins Equipment (pdf)

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Voltage and Resistance Charts For the KWM-2- Series (pdf)

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Heath Equipment

Improved Modulation For the TX-1 Apache (pdf)

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Service and Modification Information for the DX-100 (pdf)

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12-meter Band RX-1 Mohawk Modification (pdf)

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Eliminating Warble Fron the SB-Line LMO Units (pdf)

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Antique Radio Collection

Recently Acquired Unknown Receiver (pdf)

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Antique Radio Collection (pdf)

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General Interest Articles

Nostalgia (pdf)

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More Nostalgia (pdf)

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Just Who Did Invent Radio Communications (pdf)

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Tale About a TVI Situation (pdf)

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Lightning and Grounding

Lightning Primer (pdf)

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R.F. Grounding Primer (pdf)

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"Olde tyme" qsl card designs

1950s Collins Radio QSL (pdf)

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1960 Collins Radio QSL (pdf)

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General Electric "From the Log Of" QSLs (pdf)

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Gonset QSL (pdf)

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Johnson QSL (pdf)

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Walter Ashe QSL Instructions (pdf)

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Walter Ashe QSL Artwork (pdf)

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WRL "My QTH" QSL Instructions (pdf)

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WRL QSL Artwork (pdf)

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More articles will be added in the future