This is quite a widely-reported phenomenon with CRTs. It seems very common in the vintage TV world that the CRT in an old TV will take some hours of operation to 'wake up' after having been unused for

Dear Paul, First a happy new year and thanks again for the replacement display board for the DC508 counter. This works fine if I use my DC508A as a "normal" frequency counter. I just wanted to let you

Welcome to TekScopes. Please edit any posts/replies to the list to minimize quoted material to that required for continuity. Please do not send personal replies to the list. Replies currently go

Hi all, Does anyone still use plotters or pen recorders? I have had one for years which I originally got to plot PCB patterns on copper using an etchant resistant felt tip pen. It worked nicely until

Were ALL the traces active?

I'm getting really annoyed at aetoulis. I asked him a perfectly legitimate question about the other amplifier - the one with the volume control (331094423899) - and he didn't include my question along

Tom, I can't speak to specific sweep speeds, I was just doing general testing under various conditions... I remember evaluating the beam modulation that I saw at low sweep speeds, then I fed a

I drilled and reamed one of the little stubby felt tip pens out to where the regular pen was a friction fit. Not hard to do even with just hand tools. ST

Come on, look on the bright side. Perhaps he can't speak English. Happy New Year. Don Black. This email is free from viruses and malware because avast! Antivirus

Damn! Everytime I think I have everything, someone has to show me something like this video to make me realize I need to live another hundred years to be able to do all the things I want to do. In

Hello-- Beware of Geeks bearing grifts.... Yours for audio purity, truth in advertising, and the eternal quest for Something Better (or failing that, something more expensive). 73, and my best

Now that one is a definately a ripoff. It doesn't have a volume control and he wants THAT much for it ??!! -- Paul Amaranth, GCIH | Rochester MI, USA Aurora Group, Inc. |

Hi all, I pulled the FPLA and power cycled the unit a few times and I saw traces! Power cycling a couple more times but I never got a trace again. Here are some images: http://imgur.com/a/q6fOe So,

Here is one with wires in it. http://www.ebay.com/itm/Battery-Tube-Only-Headphones-Amplifier-for-Sennheiser-HD-580-600-650-Beyer-DT880-/331096206110?pt=US_Pro_Audio_Amplifiers&hash=item4d16df2b1e

Something I noticed before on my 7603 and confirmed recently while working on it is that the longer it is operating, the sharper and brighter the CRT gets even after adjusting the focus and

Hello all, Thanks for the replies! Shortly after I posted this topic the author of Modular Synthesis, Dave B., got in touch with me and has been walking me through a potential fix over email. Wher we

Did you do the test under different sweep speeds and magnify? The fastsweep times might require higher power? Tom

Hello, Thank You all for excellent andvery useful advices. You were right; I measured HV atthe test point on the CRT socket. The voltage is only 2325 V, and should be3400 V. Then tried to

<Scratching Head> My U800 is *not* getting hot... maybe warm, maybe, but definitely not hot. Unit left on for hours and temp is mildly warm to touch, touch being full finger contact across length of

In the places where Tektronix used parallel transistors without emitter ballast resistors and apparently without grading, I suspect the reason was to raise the current gain at high peak currents where