Search found 277 matches

by Bob Reite
Sat Sep 15, 2018 4:42 am
Forum: Neutrons, Radiation, and Detection (& FAQs)
Topic: Victoreen 450p question
Replies: 9
Views: 2882

Re: Victoreen 450p question

I don't know, the Sylmar California DC to AC converter station got tired of all the maintenance on their insanely large mercury vapor thyratrons and when they where damaged by earthquakes, replaced them with solid state devices.
by Bob Reite
Wed Aug 15, 2018 10:42 pm
Forum: Images du Jour
Topic: Berryville hamfest booty
Replies: 6
Views: 714

Re: Berryville hamfest booty

I also think the tin whisker issue with the RHOS alloys is going to be a serious problem as equipment ages, especially with the fine pitch of surface mount component leads. Then again, people these days throw away stuff before it's five years old, so the whiskers probably won't have time to form bef...
by Bob Reite
Tue Aug 14, 2018 7:01 pm
Forum: Images du Jour
Topic: Berryville hamfest booty
Replies: 6
Views: 714

Re: Berryville hamfest booty

The ROHS solder is pretty much crap. While the joints might be good they all look like cold solder work of an amateur on cooling. Nothing touches tin/lead... and no tin whiskers either. Ah I'm not the only one that noticed that "dull" look of lead free solder. Stuff I want to sell in CA has to be m...
by Bob Reite
Wed Aug 08, 2018 1:13 am
Forum: Images du Jour
Topic: Berryville hamfest booty
Replies: 6
Views: 714

Re: Berryville hamfest booty

I would have grabbed those ceramic standoffs had I been there. To replace the ones that always seem to get broken in the ATUs at AM broadcast stations.
by Bob Reite
Sun Jun 17, 2018 6:11 pm
Forum: FAQs: Neutron - Radiation Detection
Topic: FAQ - Extensive paper on neutron activation
Replies: 12
Views: 2807

Re: FAQ - Extensive paper on neutron activation

https://archive.org/web does a pretty good job of preserving sites from the past.
by Bob Reite
Sun Jun 10, 2018 3:59 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: 277 volt power at home
Replies: 9
Views: 2671

Re: 277 volt power at home

Set the lamp to 208 and run it at reduced voltage using a buck transformer. Too bad it doesn't have a tap for 230 or 240 volt
by Bob Reite
Wed Jun 06, 2018 2:06 am
Forum: New User Chat Area
Topic: Annealed copper gasket for hv feedthrough?
Replies: 1
Views: 682

Re: Annealed copper gasket for hv feedthrough?

I never bothered to anneal copper gaskets for installing feedthroughs, just viewports and never had problems.
by Bob Reite
Tue May 29, 2018 10:31 pm
Forum: Announcements and Site Administration Topics
Topic: A bit more on hamfesting (buying and selling)
Replies: 7
Views: 1701

Re: A bit more on hamfesting (buying and selling)

If I go to a 'fest at all this weekend, it will be the Rochester ham fest since it is only half the distance that VA would be from me.
by Bob Reite
Sun May 27, 2018 10:49 pm
Forum: Announcements and Site Administration Topics
Topic: A bit more on hamfesting (buying and selling)
Replies: 7
Views: 1701

Re: A bit more on hamfesting (buying and selling)

I probably should qualify that I can do gull wing and two terminal SMT rework, the most common types encountered. If the bad device is a BGA, forget it! Time for a board swap in that case.
by Bob Reite
Sat May 26, 2018 10:48 pm
Forum: Announcements and Site Administration Topics
Topic: A bit more on hamfesting (buying and selling)
Replies: 7
Views: 1701

Re: A bit more on hamfesting (buying and selling)

I bit the bullet a couple of years ago and bought surface mount rework equipment and learned how to use it. That's because newer broadcast gear is loaded with SMT and unlike consumer electronics, you can't just go to Wally World and buy another for a couple of hundred bucks. So I can fix the newer g...