Adding BANDSPREAD to a tube radio, and using external BFO for SSD monitoring.

Electronics Old and New by M Caldeira

description

Most of the tube radios that I restore have a single shortwave band, and no bandspread at all. This means that you cannot really do much fine tuning. Trying to pick up amateur band transmissions is very difficult due to the cramped band, and therefore not practical. So what happens if we try to add a bandspread function to it? And then, what if we try adding an external BFO to decode the SSB communications? Will it work? See for yourself. Have fun.

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TimeStamps 00:00 Adding BANDSPREAD to a tube radio, and using external BFO for SSD monitoring. 04:28 Adjusting the oscillator capacitor slightly 05:58 The adjusted cap and where it goes 10:31 Demo of the bandspread 19:21 SSB decoding demo 22:50 Closing

#tuberadios #antiqueradio #radiorestoration

_HUNDREDS OF OTHER VIDEOS TO CHOOSE FROM DIY TEST GEAR: The title says it all: https://www.youtube.com/watch?v=7buNHf6HoDw&list=PLy5M_tA9ux7KkjmWX0I0zNocg6NF33EfL

RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment: https://www.youtube.com/watch?v=7xvTGd4ysRE&list=PLy5M_tA9ux7JSYx8z2mw303vx287LHpzf

HowTo's: Various videos on some simple techniques and projects: https://www.youtube.com/watch?v=lgr-J_D6pSU&list=PLy5M_tA9ux7K3B77iUGyLPai3RIvJOrkO

See also playlists on some other completed restoration projects.

PHILIPS BX750A: https://www.youtube.com/watch?v=i8U9Lteja5o&list=PLy5M_tA9ux7IG6XgctidGO0u0DeT3_CxF

TELEFUNKEN OPUS 2114: https://www.youtube.com/watch?v=_HO2bjY5vuw&list=PLy5M_tA9ux7LhcZ9h9plfTFmjaM1mcifu

SABA UW-175-Z 3D: https://www.youtube.com/watch?v=cca4i60ZLw4&list=PLy5M_tA9ux7IWL18nsrSf4RnjsuPjHC-p

GRUNDIG 1070: https://www.youtube.com/watch?v=i4J5l0fwhko&list=PLy5M_tA9ux7JgnyYPRWOK763aJ8bg3iCI

SCHAUB-LORENZ GOLDY 58 type 3020: https://www.youtube.com/watch?v=RSbt7qVed78&list=PLy5M_tA9ux7IBse5G--Kl89SPS9sATXfZ

BUSH VHF64: https://www.youtube.com/watch?v=U--6JymkQ1M&list=PLy5M_tA9ux7KsvN5M48cX6cxN4jSz0s3X

GRUNDIG 3060A: https://www.youtube.com/watch?v=7x2sK2GSYeE&list=PLy5M_tA9ux7L8e9h8lrHGREPqcgWO-YQm