Homebrew Transmitter Part 03
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4:32
GI46B vs 3-500z Heathkit SB-220 linear amplifier HF 1,6KWby ratoeletronico794 views- 1:21
Ukryta Kamera-WC dla pan czy panow?Smieszneby Karoll199810,170,427 views
- 8:41
Homebrew Transmitter Part 04by W5HRO736 views
- 4:28
LINEAR HF 5KW (SRL459) (part1)by sv2jom2,866 views
- 3:02
TUBES 813 PART2.WMVby sv2mdr6,671 views
- 8:35
Homebrew Radioby 74wwafer14,881 views
- 5:48
Royce 1-642 rare big base transistor CB radioby tramdr6,194 views
- 2:58
My HomeBrew 4-400 Linear 1500 wattsby xlisiv12,203 views
- 1:54
AM TRANSMITTERby TheKostaskos3,366 views
- 3:02
1431am thessaloniki 500w MW transmitter dummy load test.mp4by tzitzikas20082,575 views
- 8:21
Hallicrafters BC-610-E WWII AM Transmitter Restored Pearl Harbor and Battle of Midwayby ve3iku12,081 views
- 2:21
homeownerupdait.wmvby CBRADIOLOVER5,979 views
- 7:36
4-250A 400 watt plate modulated transmitterby bauercrescent10,177 views
- 7:10
Vacuum tube or HF linear amplifier "home made"by SQ1JGU40,487 views
- 7:02
50MHZ HOMEBREW TRANSMITTER VER.2by py2majhamvideo868 views
- 3:05
BLF578 144 MHz SSPAby EA1FBF6,920 views
- 1:56
Ameco AC-1 CW QRP Transmitter and Homebrew Receiverby TechDemos39,207 views
- 4:06
Ice buildup on World Trade Center TV mastby kiotr200927,940 views
- 2:46
My Antennasby W5HRO440 views
- 0:25
LINEAR HF 5KW SRL459 (ANTENA) (part 2)by sv2jom645 views
Don't guess with airflow. You can find pressure specs which will specify airpressure across the base of the tube, easily measured with either a commercial or homemade water manometer (inches of water) Many similar tubes (3-500z) in modern amplifiers such as the Heath SB 220/ 221 are not adequately cooled, and have suffered envelope and pin "sesolder" problems due to poor tube contacts and inadequate base cooling
fourfortyroadrunner 1 year ago
I used the transmitter for 2 to 3 years before I even improved the cooling and it wasn't a problem. This transmitter amp is in Class C and running well below its maximum capability. The cooling at the tube base I have is more the adequate.
W5HRO 1 year ago