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Forgot the 73, Jim VE1RB

I have just got one of those switches for a KWM-2A I am going to repair I hope. Attached are pictures of the kit. I am currently in Houston Texas and we’ll see how close it is to fitting my Drake

Yeah, 110 watts is my TR7 barefoot. :) It handles it without breaking a sweat. I use higher power when chasing a rare DX that I need. To quote Joe Taylor, FT/JT mode "is not a low power mode, it is a

Of course it is still beneficial to add inrush protection as well as taking measures to avoid mechanical failure. Surge inrush protection can be as simple as adding a NTC thermistor of the type found

*** On my KWM-2, I don't use the switch at all. Instead, I turn the rig on & off with the cheap & available toggle switch on the power supply. - Jerry, KF6VB

Yeah, I run about 600-700 on FT8 from time to time and I have assumed that I'm getting the plates to glow a little but I can't see inside the L7. I've got graphite anodes on mine so it may not show as

Right Jim you have to run the tubes hot enough so the getter works, I can tell with the L7 that that is occurring when the thermostatically controlled fan turns to high speed on the L4B its east to

Bill, many of us thought that the contacts inside the Oak snap-switches were the part that fails most frequently but upon taking these switches apart, a few of us have determined that the main failure

I'd say at least 600W. In practise, it could be more because the power supply is likely a little "beefier" in proportion. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent

I have read that the power switches on the R4 series transmitters and receivers are also hard to find and/or expensive. If so, is there any benefit to installing some type of surge current reduction

I've run my amps at a kilowatt out on CW (with SSB plate voltage of course) with no issues. Digital modes, well, depends on your TX time. Short contest bursts you could probably do at 1 KW. They will

Thanks Jim for your input. I purchased my first L7 new in 1978, for years even on SSB I ran in the low voltage tune mode, only lately have I used the SSB mode when using that mode only, I always tune

No, NOT everyone is saying this. Always use CW mode when powering up and during initial tune up when changing bands. After that, do final tuning to the maximum power level that you expect to operate.

Yeah, you only see that "arc" if the switch is closed (or opened) while the voltage is at a peak (sine wave peak) If you have ever plugged (or unplugged) in any device that's "ON" when you plug it in

That frequency is the default setting for the RV7 5 to come up on. J107 gives you a few choices for the default power on frequency. This is covered on Page 2-2 of the manual. Sent: Tuesday, March 05,

I got the replacement Optical Interrupters and replaced them in the RV-75. Made all the adjustments and checked the connections. This corrected the problem and the RV-75 now works as it should. Only

Just wanted to add. That is a great source! And they do not rape you on shipping! KUDOS! Thanks again!

Thanks Greg, Appreciate it. 73 Bill W4WCS

Okay, with all this chatting about RF output for the L7 what should I see into a 50Ω load from my L75? It had but one 3-500Z. Mike wb8vge

Steve and Ralph thanks very much for the information, much appreciated. Tim