Sep 4, 2011 #1 V Vermes Advanced Member level 4 Joined Aug 2, 2011 Messages 1,163 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,316 Activity points 22,318 Presented device is based on two tubes. There are 3 vacuum tubes on the photos, because the third one is a rectifying tube (in old times, this lamp wasn't counted in). Tubes: EF80 – reaction degree ECL86 – two-step amplifier 6D14P – rectifying tube Schema: Link to original thread – Lampowy odbiornik reakcyjny z detekcją siatkową
Presented device is based on two tubes. There are 3 vacuum tubes on the photos, because the third one is a rectifying tube (in old times, this lamp wasn't counted in). Tubes: EF80 – reaction degree ECL86 – two-step amplifier 6D14P – rectifying tube Schema: Link to original thread – Lampowy odbiornik reakcyjny z detekcją siatkową