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I guess if you were in one of the cheap-water states you could just hook it up to a hose and run water through it to a drain or out to the lawn. I have a 500W Bird 30dB attenuator. I routinely use it

I have a water-cooled Bird load that can take a kW for long enough to measure, when it’s dry. I’ve never run it water-cooled and have tested many L-4/L-7/LK-500/SB-220 type amps over the years. If

George, If I read the info on the QRP Labs vwebsite correctly, the VFO kit you have puts out a square wave signal. They show a kit that puts out a sinewave, but it isn't available yet. I am curious if

Probably a biga$$ Bird. At the 1KW DC input level I have one that would handle it. 73 -Jim NU0C "jerry-KF6VB" <jerry@...> wrote: -- 73 -Jim NU0C

This is about the easiest way I can think of executing this. QRP Labs VFO/SG kit is about $35 and the case is about the same, plus shipping. I spent 2 hours completing the kit and enclosure, easy to

I wonder what they used for a dummy load? - Jerry, KF6VB p.s. It's probably time to get the Beast ( Alpha 78 ) out of the shed and give it some exercise before the electrolytics dry out.

Yeah, that's a shame that we still have such impediments. In the grand scheme of things, a few 60 year old tubes are nothing. If I was going to Demark this year, I'd pop a couple in my bag and trade

Steve, I'd love the approach of shotgunning, but nope I do not have a complete set. I do have 2x12ba6 in the mail and 1 12be6 also in the mail, so that will be the starting point. I did consider and

I was always under the impression that the tests were terminated before any actual failure happened. 73 -Jim NU0C "John K5MO" <johnk5mo@...> wrote: -- 73 -Jim NU0C

Now is the time, if you either have a spare set or have another R-4B, to swap every tube out at the same time (“shotgunning”). I had an R-4B that was vexing me to no end until I replaced all the

Thanks to all of you.? I will try in the next few days and post results. -- Regards, Wes WA6JYK

When unpowered, S1+a hair, so very close to zero. Have checked the following resistors so fare... Just FYI, nothing more.. R9 1.5K** Board 9 OK R8 220K** Chassis Right Side -R OK R12 1.5k**Board 9 OK

Yes, I have been bit by one of the meter terminals. It hurts :-). This circuit is at around 150V potential. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from [Proton

I’m not sure if the meter’s resistance/current rating. Do start with a large series resistance when testing. I had not considered that the meter itself could be at fault. Where does the needle

Thanks Jim and Paul, That's impressive.? I wonder what finally gave up the ghost....rig or tube? Great idea for an ad and getting 1600 entries meant people were paying attention. John

OK, so that means that your TR7 is accurate to 100 KHz +/- 1 count. Which means that when your digital display reads for example 14200.0 your actual frequency can be anywhere between 14200.000 and

Hi Michael More safety: Let the Drake unlugged power plug and cable be visible to you, on your workbench, while you work on the Drake. (Then it be much harder to get an accidently electric shock.) --

Hi Michael Also: Find out howv much current is needed for full s-meter deflection. -- best regards, Glenn, OZ1HFT

Hi Michael Warning: Be very careful - do not put your hands or probes into the receiver while turned on. Without current - remove one wire end to the s-meter. With a (variable) voltage source and a

My TR7 is spot on with the digital display on freq down to 100 hz or xxxx.1 mhz.? My freq counter also displays the proper freq to 6 digits. What the RV-75 is not doing when tuning is displaying the