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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

Is the frequency calibration of your TR7 accurate? The RV75 assumes it is connected to a TR7 that is calibrated to spec. It doesn't know one way or the other. 5-5.10? I don't quite understand what you

As I reported, I had to replace one of the Optical Interrupters (I replaced both) and then started a full adjustment. Something went wrong and now the unit is off by 1khz. Instead of xx250.0 when you

For the model 86 contest it was 867 hours, 37 minutes, 17 seconds.? 1602 entries received. Paul, W9AC

18 days with a 76 and 37 days with a 76A. 73 -Jim NU0C "John K5MO" <johnk5mo@...> wrote: -- 73 -Jim NU0C

I remember these ads really well, and vaguely recall this (from one of the ads you posted) Anyone recall how long it ran with the brick on the key? John K5MO

Thanks, Jim. A lot of these gadgets aren't as useer-friendly to me as an ol' sweeper and scope. I bought up an estate a few years ago and had two of those BY HT's. I guess you have to load software

I have. Mark has a very extensive collection of potentiometers. He was able to provide me with a brand-new two-gang pot with on-off switch, with a tap on one of the pots and with a custom-length

I am most interested in the era of the 76 and 77. 73 -Jim NU0C "Paul Christensen" <w9ac@...> wrote: