The L3 company has a division that makes "MDC IOT" transmitting tubes, their date for these tubes indicates the cooling oil they use, which is a synthetic fluid. -- Ron KA4INM - The next election, I
/*snip*/ Wrong, water (H2O) is an insulator. It is used with nearly 40 kV on collectors of klystrons and other high power UHF transmitting tubes. Dirty water is conductive and it doesn't take much to
It has been very common for the rectifiers of in X-ray machines to be immersed under oil with the transformer, I have asked technicians what the equipment is like, they say 6 glowing glass tubes, six
40,000 Volts DC across 36" of Teflon tubing does not put H2O the conductor category. It is little more than trivial to add a demineralizer to the cooling circuit. -- Ron KA4INM - The next election, I
By adjusting the antenna length to be resonate at the exciter's frequency the antenna is that "tank circuit," it's just lossy by the radiation resistance. A variable coupling capacitor is not necessa
I can not follow this tread to it's originator, but: I had a sub-assembly fail a week or two ago and the problem was a 39 k Ohm 2 Watt resistor (one of two) had burned it's self DOWN to 30.09 OHMS a
In this application the carbon composition resistors are not cooked adequately to render the phenolic material into carbon, shunting the original carbon rod. It seem obvious that resistor's phenolic
I was taught a resonant antenna is a tank circuit, antennas usually have some figure of "Q" over 1 and if some of it's capacitance is contributed by the plate to ground of a power tube I don't see h
I was taught the applied Voltage developed an insulating layer on one of the foil surfaces {similar to anodizing} in contact with the electrolyte, the thickness is proportional to the Voltage. (on t
I have always used "Sprague Atom" (orange "heat shrunk" labels) wherever possible. Over my 60 year carrier I have replaced no more than one BAD "Sprague Atom" capacitor and I am sold on Spragues abi
I have in my life gone into stores and my "usual" was absent, I asked a employee where did they move "*" to and was told, we can't keep them on the shelves so we quit trying, we don't carry them any
I recommend taking the horizontal output transistor out of an old NTSC (analog) TV set. They are about 1,200 Volts at 6 or 7 amps, heat sunk. A single hi Voltage (Video output transistor) inverter an
It was also used in transmitters, such as my Heath DX-100. I became familiar with the clamp circuit (a 6AQ5) when I built a T-R switch on the Pi network and the electron noise from idling current was
HI sasas asasas: I have been looking at this schematic all week. I don't get the "500w rms - 2 kW PEP" thing, that doesn't make sense to me. RMS isn't that different from average and 2 kW PEP is abou
Hi sasas asasas: I haven't found the detail of this amplifier yet, was this amplifier designed for 160 meter at the same gain and efficiency as the other bands? Did you test the gain and efficiency a
I suggested replacing the broken core and testing at 67 and 1.2 MHz to see if the frequency extreme is a problem. -- Ron KA4INM - The next election, I know what is going to happen, I'm going to help.
The trouble is: I don't think this amplifier using "switching FETs" instead of "RF FETs" is capable of inputting enough DC power to output 2,000 Watts of peak envelope power. 110 Volts X 16 Amps = 1
What was the price compared to 811A? -- Ron KA4INM - The next election, I know what is going to happen, I'm going to help. _______________________________________________ Amps mailing list Amps@conte
Single ended? Or double ended? (P-P or parallel) I vote for adding any circuit that can protect the tubes and their elements. A separate LED for each part of the protection is a must to me. -- Ron K
Steel Wool should never be used on wood or anything that you try to "pretty up" because you will put micro-slivers of steel in your project that will eventually rust and turn brown, even under varni