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All my test equipment is obsolete. But it all works, and that's what I care about. I've got good stuff, HP and GR and Tektronix well represented.
I use my ham license all the time. I have worked over 300 countries and have two antenna towers with yagis. I work all the HF bands except 60m; I wasn't having fun on there so I took down the dipole. I even have a gf in Indonesia and probably will never meet her. She is a fast CW operator. We also use Skype and while I play piano, she sings.
You probably already have an FM generator. Any cheap AM signal generator is an FM generator because the usual method is to modulate the oscillator. Even fairly expensive generators did that, like my old Marconi and the Measurements Model 80 (which I no longer use). Of course you have no way to know exactly the deviation but you can come fairly close by comparing the audio level to a broadcast station. So you adjust the modulation to get about the same audio, or a bit more, and look at the audio on the 'scope. You need to use external modulation because the internal one is not very close to being sinusoidal. Adjust the discriminator in the receiver to get the nicest looking wave and you are done.
Your diode measurements indicate good diodes. I assume you can measure them independently, not in-circuit.
To replace the neon you will either have to change the socket or take the base off a new lamp and glue it into the old base taken from the bad one. A better solution might be just to parallel the two bulbs, with the new bulb just taped into place. You can't tell from outside.
I was lucky recently and acquired an HP digital synthesized signal generator that covers from 10 kHz to 2.06 GHz with AM and FM. It has an OCXO and readout to one Hz so it's as accurate as I will ever need. For audio I have several units, all HP. I also have a distortion analyzer, counter, and some other goodies. It's fun just to interconnect all this stuff and see what happens. One of my favorites is the GR 1658 Digibridge which measures passive components very accurately.
Since I am getting on in years, I am concerned that my heirs won't know what to do with all this stuff. On the other hand, it's their problem. I am having fun and as long as I am healthy I will continue to play.
I told a lady friend that I bought myself a present of a new voltmeter. I asked how many people would like a voltmeter as a present. Some people just don't understand us nerds.
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