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Hi Dimitri, Had a horrible high-pitch noise in the SMPS of my 2215, though was from cold, unbearable (I am only 40 so I still hear this kind of noises...sadly). Power rails were all spot on and ripple

Same here. Dumont black-n-white TV was particularly loud to me. Funny, I can't hear that my LED TV. :) Thanks, Barry - N4BUQ

it When I was a kid the line whine from the TV at 15.625kHz (UK) used to drive me nuts. Now in my early 60's those days are long gone! I think I still have a good chance of hearing the older 405-line

Look through the archives for "singing power supply," and related links and discussions. I posted quite a bit of info on this a few years ago. Ed

Oops - one more thing. While looking at the old vacuum unit some more, I saw a second solenoid valve and remembered I added it for vacuum-hold, to prevent run-back through the pump. The pump has no

DS 1)As long as the Supply Voltages and Ripple is in spec too soon to talk about recapping 2) Most likely your hearing the whine of the power supply oscillator ( at my age I couldn't hear it anyway)

Hello: I am checking out my 2235 (US/AN version), and apart from some other idiosyncrasies, that I will leave for later, the unit is making a quiet, but very unpleasant high pitch "whine" after about

John, BTW, thanks for responding and thanks for your efforts... Raymond

On Mon, Jul 30, 2018 at 03:03 PM, <johnasolecki@...> wrote: Hi John, > > I have it in PDF form so I'll have to figure out where to post it. Doesn't > seem appropriate to put in on a Tek

KO4BB.com -- Dave Manuals@... www.ArtekManuals.com

The link I had for the SR 760 manual seems to be dead. I have it in PDF form so I'll have to figure out where to post it. Doesn't seem appropriate to put in on a Tek dedicated website... Suggestions?

Hi Dennis, In fact, I've download "Decibel X" right after the first try. It was the highest rated dB meter in the appstore. My bench has a "noise floor" of around 50dB, it's summer, windows are

A few volts change is needed at TP41120 in order to vary the trace brightness from just visible to normal. So 2 mV is nothing in my opinion. You might simply verify this. Vary the Intensity control

Hi John, If the service manuals are in pdf form, can you post them somewhere? I would be interested too. Thank you. Best regards,

I too have had my share of Bourn's 3352 failures. In my case they were inside my Tek 465B. One failed pot had no slider connection, end to end resistance was intact. This post was in horizontal gain

While triggering on the CRT cable signal (to make the dotting stand still) I checked TP41120 (with the other Vert plugin) and I could see ripple of 2mV that aligns exactly with the dotting. Is 2mV

Thxs! JRM

The pictures are actually oriented properly. They looked sideways when I was uploading. Ed

I got kind of nostalgic about the vacuum unit I described, so took a look at it - haven't seen the inside in a while. The first thing I realized is that my memory didn't serve me well - it was quite a

I'm thinking that the clue, other than proper heat, is to have what I'd call a high impulse on the vacuum, basically, not allowing the vacuum to switch on while the pump is ramping up to max