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KG7TR

3/31/2018

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Episode 191 - Mike Bohn - KG7TR

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Mike Bohn, KG7TR, has been building his own amateur radio equipment since he first entered the ham radio hobby over 50 years ago. Mike builds around the parts he has on hand creating beautiful vacuum tube transmitters, receivers, and high power amplifiers that rival the look and feel of early Collins radio equipment. We take a deep dive into the construction technique of KG7TR in this QSO Today.
Show Notes
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This Episode's Sponsors
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Yaesu FT-817, 818 Power Pole Adapter
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QRP-Labs Arduino Shield
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KG7TR Homebrew You-Tube History

KG7TR History in Slides


QTH:
Show Low, Arizona

RCA 630TS Television Kit

Heathkit C3 Condenser Checker

Heathkit Thomas Electric Organ


Heathkit AR3 Receiver


Understanding Amateur Radio, by George
Grammer, ARRL


Homebrew Transmitter - ARRL Handbook


6AG7  Vacuum Tube


1625 PA Vacuum Tube


Gateway Electronics, St. Louis


6BG6

Lafayette KT-200 Receiver


First License: WN0BFX, 1961, Age 12

Other call signs
: WA0BFX,  WA3TKA

Solder Sipper - 1957 Teflon Tube

Emerson Electric Company, St. Louis, Radar Division

Boeing B52H
 - flying fortress

University of Missouri, St Louis, BS Applied Physics

USAF, Officer Training School

Heathkit DX60 Transmitter


Phasing Transmitter

ARC5 Transmitter

1625 Vacuum Tube


Single Side Band - SSB


Barker and Williamson Phase Shift Network


Walter Ashe Radio, St. Louis - Here is there 1950 catalog

KG7TR HB-600 Power Amplifier


Central Electronics Radio Transceiver


Unobtanium electronic parts - parts that are no longer available

813 Transmitting Tube

Antek, NJ Transformers


Audio Transformers 20K to 600 Ohm

Mesa, AZ Hamfest


Scottsdale, AZ Hamfest


Flagstaff, AZ  Hamfests


Collins 2.1Khz Sideband Filter


Collins 75S3 Receiver


Arduino

SI5351 DDS Module


Arduino Projects for Amateur Radio, by Jack Purdum, Dennis Kidder


ADD9850 frequency synthesizer


Current amplifier Texas Instruments LMH6703


N3QE - noise from DDS modules


Solder Smoke Podcast


Electric Radio Magazine


Microsoft Visio for schematics and diagrams

Amidon Associates for toroids


Mini Ring Core Calculator


Fiberglass Rod Stock 3/16


Datamark Dry Transfer Letters

Clear Label Stock with adhesive backing


Water transfer decal laser printed


Excited by: The amazing number of home brewing resources now available on the Internet, Bitx Transceiver Kit, Getting people making things again

Advice to new or returning hams: Start with the KG7TR website

Octal Tubes

6SN7 Dual Triode


​Russian GL13 Tubes

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KG7TR First SSB Rig
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Vintage SSB Special
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Octalmania Transmitter and Receiver
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75S-2B Receiver
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