So I have my first HF rig, itself a gift from XYL's father. The rig is a Heathkit SB-102, which he insists is a 'piece of crap,' 'junker rig' and other such similar remarks. Considering it's the only HF radio I have ever owned, I'm not in any position to respond, but I am going to attempt to bring it back to full operating condition. This is what I know about the rig: The bad: 1. It has no audio on the LSB setting at all. 2. I don't have a key, but when testing it, no relay would close on CW mode and there is no output on CW mode. 3. The original speaker is gone. The good: 1. It will both TX and RX on 20m USB. XYL's father made contact with someone in Canada with it about 2 weeks ago. 2. The original mic and power supply were both included and work. 3. It was free. 4. It worked at one time and nobody's been inside it since then, so presumably, it was built correctly. I have already PMed a few of you but I'd like to post this in the open forum for any insight. For the time being, I am mostly interested in information that can get me started with troubleshooting this thing. I don't know very much about troubleshooting a radio, although I did spend 4 years in maintenance and am confident in my electrical troubleshooting skills. That said, vacuum tubes are something I'd previously only seen in pictures in a textbook and old films, so I am in uncharted territory. A manual that explained the theory of operation of the various circuits would be a good start. Advice on where to begin and what I'll need besides a basic multimeter would be a good start. I am not in a hurry and would like to take my time and get this thing back working properly, and then I'll try to get on the air with it.