Re: [Boatanchors] Question for Eimac 4-65A Tube
Night light, Now, there is an interesting use for all the 4-65A tubes I have. Now, saying that, it seems, according to data sheets, that the 4-65A tube will produce 375 Watts PEP as class AB2 SSB amplifier. Wonder how clean it is when used that way? 73 Bill wa4lav From: Boatanchors on behalf of Scott Johnson Sent: Saturday, November 7, 2020 5:44 PM To: 'William Morton' ; 'boatanchor' Subject: Re: [Boatanchors] Question for Eimac 4-65A Tube CAUTION: External Sender It is basically a tungsten lamp with a Titanium lampshade. Go for it. Scott V. Johnson W7SVJ 5111 E. Sharon Dr. Scottsdale, AZ 85254-3636 H (602) 953-5779 C (480) 550-2358 scottjohns...@cox.net scott.john...@ieee.org -Original Message- From: Boatanchors On Behalf Of William Morton Sent: Saturday, November 7, 2020 11:51 AM To: boatanchor Subject: [Boatanchors] Question for Eimac 4-65A Tube Hello Everyone, My son and I have a question regarding firing up the filament of a 4-65A tube with no connection to the grid or plate (and no plate cap heat sink, either): If we light up the filament and leave it glowing for a long time, is there any danger to the tube? It would be akin to using it as a nightlight (which we are not). By a 'long time', let's say 5 hours. Thanks in advance for any comments. Best Regards, William, and Son ___ Boatanchors mailing list Boatanchors@puck.nether.net https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpuck.nether.net%2Fmailman%2Flistinfo%2Fboatanchors&data=04%7C01%7Cwlfuqu00%40uky.edu%7C745bd11019f349f2b20d08d8836eb6f8%7C2b30530b69b64457b818481cb53d42ae%7C0%7C0%7C637403858823773677%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=XP4Kl7nJjGYpISAq8LiKYwKG2DbioE3EuCzVp8zVxQ8%3D&reserved=0 ___ Boatanchors mailing list Boatanchors@puck.nether.net https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpuck.nether.net%2Fmailman%2Flistinfo%2Fboatanchors&data=04%7C01%7Cwlfuqu00%40uky.edu%7C745bd11019f349f2b20d08d8836eb6f8%7C2b30530b69b64457b818481cb53d42ae%7C0%7C0%7C637403858823773677%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=XP4Kl7nJjGYpISAq8LiKYwKG2DbioE3EuCzVp8zVxQ8%3D&reserved=0 ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Question for Eimac 4-65A Tube
Make sure you set the filament voltage to or just below spec with a good VOM, preferably an RMS meter, or it won't give you the life you would like. Ray, W4BYG On 11/7/2020 22:44, Scott Johnson wrote: It is basically a tungsten lamp with a Titanium lampshade. Go for it. Scott V. Johnson W7SVJ 5111 E. Sharon Dr. Scottsdale, AZ 85254-3636 H (602) 953-5779 C (480) 550-2358 scottjohns...@cox.net scott.john...@ieee.org -Original Message- From: Boatanchors On Behalf Of William Morton Sent: Saturday, November 7, 2020 11:51 AM To: boatanchor Subject: [Boatanchors] Question for Eimac 4-65A Tube Hello Everyone, My son and I have a question regarding firing up the filament of a 4-65A tube with no connection to the grid or plate (and no plate cap heat sink, either): If we light up the filament and leave it glowing for a long time, is there any danger to the tube? It would be akin to using it as a nightlight (which we are not). By a 'long time', let's say 5 hours. Thanks in advance for any comments. Best Regards, William, and Son ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors -- They say a smart person learns from their mistakes. A wise person learns from the mistakes of others. -- This email has been checked for viruses by AVG. https://www.avg.com ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Question for Eimac 4-65A Tube
It is basically a tungsten lamp with a Titanium lampshade. Go for it. Scott V. Johnson W7SVJ 5111 E. Sharon Dr. Scottsdale, AZ 85254-3636 H (602) 953-5779 C (480) 550-2358 scottjohns...@cox.net scott.john...@ieee.org -Original Message- From: Boatanchors On Behalf Of William Morton Sent: Saturday, November 7, 2020 11:51 AM To: boatanchor Subject: [Boatanchors] Question for Eimac 4-65A Tube Hello Everyone, My son and I have a question regarding firing up the filament of a 4-65A tube with no connection to the grid or plate (and no plate cap heat sink, either): If we light up the filament and leave it glowing for a long time, is there any danger to the tube? It would be akin to using it as a nightlight (which we are not). By a 'long time', let's say 5 hours. Thanks in advance for any comments. Best Regards, William, and Son ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Question for Eimac 4-65A Tube
Shouldn’t be an issue. Just observe the 6.0VAC rating. Running it from a 6.3V trans may not give you the internal transformer drop you need to be at 6.0V. If need be put a very low value 0.1 ohm, 5 watts or more in series. But check the actual voltage you get with your supply. 73 Howie WB2AWQ Sent from my iPhone > On Nov 7, 2020, at 10:51, William Morton wrote: > > Hello Everyone, > > My son and I have a question regarding firing up the filament of a 4-65A tube > with no connection to the grid or plate (and no plate cap heat sink, either): > If we light up the filament and leave it glowing for a long time, is there > any danger to the tube? It would be akin to using it as a nightlight (which > we are not). By a 'long time', let's say 5 hours. > > Thanks in advance for any comments. > > Best Regards, > > William, and Son > ___ > Boatanchors mailing list > Boatanchors@puck.nether.net > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpuck.nether.net%2Fmailman%2Flistinfo%2Fboatanchors&data=04%7C01%7C%7C1353288790374a05125708d8834e1fc9%7C84df9e7fe9f640afb435%7C1%7C0%7C637403718841948855%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=li0EmEppVS%2B09dBgzgtVoqHNL1d9i%2BgNdzN5IW8hpc4%3D&reserved=0 ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
Re: [Boatanchors] Question for Eimac 4-65A Tube
NO, itv should not for that length of time. They usually burn in the tubes for longer than that. Rob K1DFT On Sat, Nov 7, 2020 at 1:51 PM William Morton wrote: > Hello Everyone, > > My son and I have a question regarding firing up the filament of a 4-65A > tube with no connection to the grid or plate (and no plate cap heat sink, > either): If we light up the filament and leave it glowing for a long time, > is there any danger to the tube? It would be akin to using it as a > nightlight (which we are not). By a 'long time', let's say 5 hours. > > Thanks in advance for any comments. > > Best Regards, > > William, and Son > ___ > Boatanchors mailing list > Boatanchors@puck.nether.net > https://puck.nether.net/mailman/listinfo/boatanchors > -- Robert Vincent DLM Antenna Technology 401-487-3933 This E-mail message and any attachments may contain legally privileged, confidential or proprietary information. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any dissemination, distribution or copying of this E-mail message is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete this E-mail message from your computer. The world will not be destroyed by those that do evil but by those who watch and do nothing. Albert Einstein. "America does not need to see the tax returns of a billionaire who became a public servant. America needs to see the tax returns of public servants who became millionaires while being public servants" Jaeson Lubell ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
[Boatanchors] Question for Eimac 4-65A Tube
Hello Everyone, My son and I have a question regarding firing up the filament of a 4-65A tube with no connection to the grid or plate (and no plate cap heat sink, either): If we light up the filament and leave it glowing for a long time, is there any danger to the tube? It would be akin to using it as a nightlight (which we are not). By a 'long time', let's say 5 hours. Thanks in advance for any comments. Best Regards, William, and Son ___ Boatanchors mailing list Boatanchors@puck.nether.net https://puck.nether.net/mailman/listinfo/boatanchors
