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The owner of a Rocket R60V I'm working on has stated that quite regularly he will return to the always-powered machine and find the grouphead cold (40-50 degrees). Additionally, the top and bottom feeding pipes from the boiler to the group are cold enough to touch. After lifting the brew lever briefly, the pipes begin heating up rapidly, and the group begins to heat to about 90 degrees. If I remove the mushroom while the group is sitting at 40 degrees, I find the brewing chamber almost totally empty, as in the photo below.

This points to a thermosyphon stall caused by water escape, and as soon as water is reintroduced the flow begins again and the stall ends (i can actually see water curren

After creating a fresh email address with my fancy callsign domain name less than a month ago, I registered it with two services only - Radio Amateurs Canada and Echolink.

Clearly, at least one of those services have had some ongoing or recent leak of personal information, because this morning I recieved a phishing email entitled "Radio Amateurs of Canada Closing Spe­cial R­ep­ort '23".

The email claims I've received a secure communication and that I need to open the attached HTML file to access it. The email is not from a RAC or Echolink email address, but instead from a likely separately compromised email server.

Always check the sender email address before opening email attachments. Be

I'm repairing a non-booting, non-chiming iMac G3 350MHz slot loader with a probably failed flyback transformer. Unlike the early Bondi models, there is no mac video cable to unplug to isolate the main board from a failed CRT circuit. The power supply and the CRT circuitry are combined on the PAV board.

I have dismantled the system and removed the flyback transformer from the PCB. I was thinking I could confirm the flyback as the root of the problem by partially reassembling the computer and testing it for a chime or drive activity.

Is there any potential for damage to the rest of the PAV board or the mainboard by powering the system without a CRT tube or flyback transformer attached?

I'm repairing a non-booting, non-chiming iMac G3 slot loader with a probably failed flyback. The model of G3 I have has a dual purpose PCB that integrates the CRT circuitry and the power supply for the main board (called the PAV board).

With the flyback now removed from the PCB, I was thinking I could confirm the problem by partially reassembling the computer and testing it for a chime or drive activity.

Mac-specific circuitry aside, is there any potential harm to running a CRT drive circuit without the tube or flyback attached?

We had to say goodbye to our cat yesterday and I'm so glad I had done this.

Hopefully this is reassuring to anyone who had a bad reaction to the first dose. I definitely did. After my first dose I had a high fever and chills among other symptoms, and was a bit worried about how my second dose would pan out.

I had my second dose yesterday at 9am and went to work for the rest of the day. My arm was pretty sore around 3pm. After getting home around 6pm, I noticed I was more tired than usual. Over the next few hours I started feeling progressively worse, developing chills and soreness around 10pm. I took an advil and went to bed, expecting to feel like crap th

I want to report my situation in hopes that it prepares others for the unlikely possibility of severe side effects of the first dose.

Tl;dr: throughout the day after my first dose, I had bouts of 102-103 degrees F fever, severe chills and fatigue, soreness. Tylenol, hydration, rest and positive thoughts got me through it. I woke up the next day feeling fine.

Saturday

10:20am: injection of Moderna vaccine

7:00pm: noticing arm is sore

Sunday

5:30am: awoken by VERY sore arm, took one Tylenol extra strength, checked temp (97F), went back to sleep.

6:30am: awoken by mild chills. Prepared a warm tea. By the time I was done my chills were pretty bad. Layered up and went back to bed.