开云体育

This cracks me up. https://music.youtube.com/watch?v=NGR20B2cEBQ

Sex life of an electron.....by Eddie Currents One night when his charge was pretty high, Micro-Farad decided to seek out a cute little coil to help his discharge. He picked up Milli-Amp and took her for a ride in his Megacycle. They rode across the Wheatstone Bridge and stopped by a Magnetic field with flowing currents and frolicked in the sine waves. Micro-Farad, attracted by Milli-Amp’s characteristic curves, soon had her fully charged and proceeded to excite her resistance to a minimum. He gently laid her at ground potential, raised her frequency, and lowered her reluctance. With a quick arc, he pulled out his high voltage probe and inserted it in her socket, connecting them in parallel. He slowly began short circuiting her resistance shut while quickly raising her thermal conductance level to mill-spec. Fully excited, Milli-Amp mumbled “OHM…OHM…OHM!” With his tube operating well into class C, and her field vibrating with his currently flow, a corona formed which instantly caused her shunt to overheat just at the point when Micro-Farad rapidly discharged and drained off every electron into her grid. They fluxed all night trying various connectors and sockets until his magnet had a soft core and lost all of its field strength. After wards, Milli-Amp tried self-induction and damaged her solenoids, and, with his battery fully discharged, Micro-Farad was unable to excite his field. Not ready to be quiescent, they spent the rest of the evening reversing polarity and blowing each other’s fuses.

The newly designed power supply boards I mentioned a few weeks ago are now ready. These are a replacement power supply boards that fit the One and two tube HF Commanders and the one and two tube 6 meter amps. The new technology boards are much more robust than the older original boards that have deteriorated over time. The new boards have all of the features of the old boards plus 5000 hour 105 degree electrolytics, RF bypassing and series metering resistors that should not drift and fail over time!!! I have been unable to rebuild original boards due to trace’s flaking off the board and had to do something to save these amps! Contact me at gudguyham@... for further information. Boards are built and tested and ready. Limited supply at this time as more will be on the way. Thanks, Lou Sent from the all new AOL app for iOS

I need to know asap.... what is the C between the anode and grid of a GS35B....when plugged into a socket. Typ, when they spec tubes like triodes in GG, they spec anode to grid C..... BUT that always rise a bit, when plugged into the grid ring...due to the proximity of the lower anode fins...to the chassis below the lower fins. I'm designing a PI network for a fellow....and don't have a GS35B in my shop. Does anybody know, or can measure the anode to chassis C on their GS35B tube amp for me ? In the case of an existing amplifier, the anode lead to the plate choke needs to be temp disconnected....and ditto with the RF connection, from anode to plate block cap assy. It would be much appreciated.

If you haven't done it yet, please log in to groups.io. This will let their servers know your account is still active. If you don't, you will stop receiving e-mails this weekend and be removed from all your groups in February. You should have received an e-mail explaining this. Logging in one time reverifies ALL your groups. Here is what I, as an owner, received today... You are receiving this email because you are an owner or moderator of one or more 开云体育 groups. We are in the process of reverifying some of our users and we wanted to make sure you knew what was happening and why. For more detail about this, please visit the Reverification FAQ, at /static/reverifyfaq On Saturday January 13th, 2024, an anti-spam service called Spamhaus labeled one of our email servers as a spam sender. This caused any email service that uses Spamhaus to stop accepting email from our server. Because of this, we began a reverification process and sent out reverification emails to a subset of our users on Sunday January 14th. Spamhaus lifted their block on Monday, January 15th, 2024, but we need to continue the reverification process. You can see which, if any, of your users are affected. Go to the Admin section of your group and look at the Members page. Next to each user's email, there may be a badge with the letters RI or RS. RI means the confirmation/reverification is in progress, but has not been completed. RS means the confirmation/reverification has been successfully completed. Here are the next steps in the reverification process: On Sunday, January 28th, group emails to people in the RI state will be disabled. Messages from moderators and login link emails will still work. Until February 11th, people will still be able to reverify themselves and the RI and RS badges will still show up in the Members page. After that, members still in the RI state will be removed from groups. The activity log entry will be Membership - Member Removed, with the added reason of reverification failed. For domains where no reverifications happened, no invites or direct adds will be permitted going forward. If there is a valid person on one of those domains, they should contact [email protected] to have the domain ban lifted. We apologize for the inconvenience this process may cause, but it is necessary to ensure that we are able to continue delivering group email reliably. Thank you for using 开云体育. Best Regards, The 开云体育 Team

Recently I had occasion to have to rebuild THREE power supply units ( located under the chassis) of the Commander line of amps. Two HF2500’s and one VHF2000. Both use the same power supply board. Unfortunately all 3 boards were damaged by heat and the traces flaked off the boards in many spots. The traces that didn’t lift normally did when tried to unsolder and resolder new parts. The old boards are basically unsalvageable to rebuild. The boards are obviously old technology. They are a one time board as far as I’m concerned! As usual confronted with the need, I’ve developed a brand new board using new technology on boards with masking etc. I need these boards to professionally rebuild the power supplies in these amps. I don’t trust Gerry rigging these old decrepit boards. The whole amplifier RF deck must be removed from the amp chassis to get to the power supply. You don’t want to go back on after using band-aid methods on the old boards. These amps are terrific amps and can go another 35 years with the breath of life from an all new board. Hopefully within the next month I will have these boards ready. I ordered extra for my supply for further repairs and for those who would like to attempt their own replacement I will have a limited supply I’ll be offering them fully assembled and ready to install The price is unknown at the moment until I can fully asses the expenditure. If interested I’ll take orders on a FCFS basis. I’m going to be installing one in my own personal amp as well. I have my own transformer for testing so if you don’t feel confident in doing the replacement yourself I only need the RF deck and can do it here. It’s a shame to see these good old amps sidelined for lack of parts. Thanks for reading Lou Sent from the all new AOL app for iOS

A fairly common occurrence is when the capacitor shunting the high voltage choke in the Henry swinging choke design changes value and does not resonate at the 120 hertz intended frequency. I challenge you to remove the oil-filled resonant capacitor shunting the choke and to accurately determine its actual capacitance. Using the specified component values in the amplifier parts list, compared to the value(s) printed on both the choke and the capacitor, see if any of the printed values correspond. Next, check the oil-filled cap. One way is to use the formula for determining the capacitance value for the shunt cap in a swinging choke input filter and see if the actual measured value is the same as specified. Additionally, using the formula for resonant cap and choke values, plugging in the measured values you observe, determine the resonant frequency of the small network on your bench. My question is how will you obtain an oil-filled cap with the same ratings as needed to achieve 120 Hertz? Please remember these capacitors do not live forever, and that they must have a WVDC rating sufficient to carry the amplifier’s Anode High Voltage. Respectfully, Hal Mandel W4HBM

160 Meter Coil Installation, Paralleled Band Switch Contacts etc. Here the 10 uh, 160m coil is finally installed.....made from 1/4" tubing. Bandswitch contacts have been paralleled. Taps to bandswitch now being installed. https://www.youtube.com/watch?v=ihWAoWn339E

Hi all, Just an update, we got the fan job done in my friends AL-80B amp. All is well. I never noticed that the neither of the meter lights work. The amp is already put in it's place so it is a small "project" to get it out. Anyway, the schematic that I found on line does not show the meter lights and unless I missed it, it doesn't list lights on the parts list either. Does anyone know where the meter light voltage is picked up from and what is the bulb/lamp voltage? If I can get this information ahead of time, I can get some LED's ready so we can pull out the amp, install the LED's and back together again. Thanks and 73, Bob W4JFA

What's good choice for obtaining Aluminum plate, Aluminum Chassis.. I'm searching ebay, lots of picks. Others? Short story, About to cannibalize old amp for chassis but think NEW would turn out better on this one. I can assemble Aluminum, bend - not so much. Thickness? 73 Robert W5AJ

12 KW CCS ON 160-15M...USING THE 3CX-6000A7... PART 10 Here the Teflon SFT-600 coax (teflon version of LMR-600UF) is installed between the 3000 pf vac load cap and the paralleled Jennings RJ2B output relays. Also installed is the smaller RG-400 teflon coax used for the bypass leg. Also installed is the adjustable spark gap across the load cap. https://www.youtube.com/watch?v=f_17d3YI3hk

How do I calibrate the power meter in the ALS-600? I guess thru a hole in the label below the RF Out connector on the back. Joe N9VX