开云体育

The "bloom" would normally result in the trace getting larger due to reduced HV potential as the supply dies, not smaller as you report. It would certainly be worth watching the screen voltage for

I think we're talking to the same end from different directions here. My initial description of the fade-out did not include the "bloom" because at that time I did not notice it, it happens very

I missed the part where you say it matches the symptoms. Here are the symptoms you wrote: From your above description, I see a trace that is getting shorter, 9cm to 7cm after 30-45 minutes... The

Hello Marvin, Did you see this page at the "The Valve Page" website? Ihttps://www.thevalvepage.com/teletech/crt_oc/crt_oc.htm It doesn't give a direct indication of how much stored energy is required

If you look a bit, you will see that I am all over that thread. Blooming is because when the HV drops, it reduces its potential force to accelerate electrons... the electron beam slows down. This

From your earlier post: "This will cause the beam to slow down, which will show up as the trace expanding on both the horizontal and vertical direction." That describes the trace fade-out to a T, a

My first question (i'm sure there will be many more, your site looks immensely useful) is whether you take requests to track down rare Tek birds? I've been scrounging the 'net for an HV xfrmr for a

Again, the symptoms you are describing do *NOT* indicate a bad HV transformer... but by all means replace it anyway. -Chuck Harris Chip HazTek wrote:

Thanks for the feedback. I've managed to track down one Tek HV xfrmr for the 549 (PN 120-0423-00), no idea its provenance or condition, it may be as lossy as that in my 'scope given its age. I did

Does anyone know or has anyone ever flashed a filament in a CRT? What voltage did you use? Capacitor, how big? I know that it sometimes does not work but it is worth a shot anyway. Pins are

The (aural) pictures in the radio soundtrack were superb and made excellent use of the medium; that is still true 40 years later. Best watched in a dark room :) The books are OK, but they can't

Hi Dave, There's a 2465A for parts on eBay: https://www.ebay.co.uk/itm/292742324129?ul_noapp=true Cheers, Brian.

I made the mistake of watching the movie on netflix a few weeks ago- just as cringeworthy as the first time I watched it!? Never heard the radio soundtrack, but I thought the books were good.? Would

Guys Can I suggest that you take the helpful suggestions on how to improve the gentleman's web site off list in direct email to Q-Service rather than tie up bandwidth here? Dave

Same is true with Firefox under win7, It may be a clue that it loses focus as soon as you get level with the 'Categories' tab behind the drop-down and the Categories tab is showing through the

To start with, I am a satisfied customer and expect to be so again. Thanks. Summary: very pretty, and well suited for "millennial" customers. But shame it is much more difficult to read. Based on a

Hi John, If you do decide to part these out, I just got a nice clean 7603 (ex-UK army) arrived yesterday and, of course, the surplus dealer didn't pack it right and now I need the? intensity/readout

Hi, Thanks everyone! Szabolcs zenith5106 <hahi@...> ezt írta (id?pont: 2018. szept. 25., Ke 22:53):

If the HV transformer is leaky, the HV will drop as the transformer heats up. This will cause the beam to slow down, which will show up as the trace expanding on both the horizontal and vertical

nope, multiplexed beam. Of the vertical and horizontal deflection ranges, yes. Of bandwidth limitations, not necessarily. Of mainframe balance in the amplifiers, yep. I'd want to see V as well as