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Just for the members information, and just in case - there is a site which sells complete schematics for almost any oscilloscope.
Here is the link:https://artekmedia.com/
I realized that the Tek465B manual from bama has only partial pages, and the basically good one from http://www.ko4bb.com/ is missing the said A10 schematic page. I did check this before, because I never needed to fix a 465B. Sorry for causing confusion.
Thank you FvM,
I've tried to d/l from...
Well my friends, I think I fixed it...up to next time of course :smile:
I've learned 3 important things - and one of them I'll repeat in an additional thread, as I think it is very, important for all of us, and I hope it won't be moved or deleted.
1. Friendship and Good Will are some of most...
Hello,
C4375 wast the first one to be replaced, as it had a value of 2.4 OHM!
I assumed that the problem is on the vertical amp now, however I haven't checked the PS ripple. As I don't have any idea the value of the AC do I have to expect I'll be thankful for assistance. I'll purchase in a few...
Hello again,
I am attaching a new display picture, explaining how it looks now. The "ripple" responds to all the adjustments, increasing and decreasing. Any idea(s)
Thank you for your answer BradtheRad,
I've tried again to find the the "thief" - I found a capacitor, probably a decoupling one, 0.1u/50V having a 2.2 Ohm Resistance. I found 2 through-hole caps 473, solder them in parallel, and the trace appeared! :)
I can adjust the trace vertically and...
Hello,
I am asking for the "guru"s help and assistance...
I read all the posts on this forum about the similar problem. I have no horizontal trace, and I am trying to fix it myself, as it's my main apparatus - I can do nothing without it - out of work...:sad:
After opening the case, I've checked...
Thank you again Sir,
Even that I have the original manuals, I've d/led the pdf too, hopping to do a search for the word "Bandwidth" - I assume that the manual has been scanned, so I couldn't find it.
If you know where may I find any documentation about the BW limiter, I'll be more than thankful...
Hello,
I've purchased a scope HP54111D, almost unused, and I need to measure and to display a 434MHz wave. I have 2 probes of 150MHz, (waiting for a 500MHz one), however connecting it to any signal source from 100 to 434MHz, I am getting the signal made by dots as shown in the picture. Even the...
Hello,
As I saw there are real experts on most of the PCB related software, I have several simple (for them...) questions. Thanks in advance.
I began to work with the DXP 2004, and as I don't have the manuals, I have several questions, and I'll be very thankful for help:
Usually I design 1 or 2...
I have an LM386 based amplifier, and a 1 transistor preamplifier connected to an electret mic. It is supposed to be very sensitive: the tr. base and collector are conected by a 2.2M rsistor, the collector to VCC by a 10k, the emitter grounded and the base, via a 0.1uF to the electret. The...
Right, I have those plans, but my problem is I have to change from carbon to electret type mikes, as i need to connect 3 persons to speak over 2 wires...I'm working at the telecom company, and workers have to use those devices for testing.
___battery____I|________
|...
analog electronic guru
We use at work headsets for comunnicate from point to point, i.e. let's say we are about 5 miles apart, 2 wires between us, 2 headsets. The headsets have a Carbon microphone and a dynamic headphone, connected in series. now we attach a 6V battery in series and we can talk...
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