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In order to replace the resistor, I think I'll need to remove everything so I can access the back: On instruments with serial numbers below B040909, examine the circuitry near A10U802 (the Horizontal

Hi James, The PSU schematic is f.i. at pdf page 225 492/492P Spectrum Analyzer Volume 2 Service manual ( 070-3784-01Tekwiki). Albert

??? On my TDS220 I changed the backlight lamp to a LED strip. ??? Mark Jordan, PY3SS

Hi All Anyone know what the correct voltage is at the input of L6 on the Power Supply. Its the supply circuit for the display CCFL. I'm getting -4.6v. My display is a dull shade of orange with no

The following photos have been uploaded to the SC503 - interesting waveform! ( /g/TekScopes/album?id=300884 ) photo album of the [email protected] group. * IMG_2525.jpeg (

Hi Gerald, after several years, it seems I found the right help for my 2784 Tektronix Spectrum Analyzer. I would be very interested in your Processor Extender Card with serial Port. Please let me

Hi Gerald I am repairing a Tektronix 2784. Therefore i'm searching for the Processor ExtenderBoard with the SerialPort or a Circuit Diagram for this. I know it's a 85C30 Dual Serial Interface from

Hi all, I am repairing a Tektronix 2784. Therefore i'm searching for the Processor ExtenderBoard with the SerialPort or a Circuit Diagram for this. I know it's a 85C30 Dual Serial Interface from Zilog

Thank you Mark. I can actually source these locally. Looking at the board, the pin layout isn't as obvious as I thought and I haven't been able to find any kind of schematic for the 492 PSU so

I tried simply using two VOMs. The presence of the HV probe does not change the read value at U1540 pin 4 even one millivolt. So there are two possibilities: the HV probe does not say the truth or the

James, A BUV48A will work and is heavier capacity. Mouser has these in stock for $6,76. Mark

An NPN is an NPN is an NPN, no? Therefore, it must be possible to use a more common package of transistor and bodge a solution to this unobtainium nonsense? Ok, we don't know the Gain, but we do

Hi all. Can't seem to find these anywhere. According to Sphere, these are, 'HARD to find 49xP Series Inverter Transistors! - 2N6587, TO-61, NPN, 10A/450V' - (SOLD OUT) Is these a

Greetings, all. It occurs to me that maybe this is a simpe loading problem. The HV probe is likely to have a resistnace of the order of 100M. With 1600V, the current is 16uA — not

THANKS!

It is still important that an 11300 non-A with F/W 3.1 is treated as an A-scope in CATS. http://www.hakanh.com/dl/docs/hardtofind/11k_CATS_2.19.pdf /H?kan

Sorry, my fault. It works. I was running in the wrong directory.

Thank you Hakan, I tried but its still says “LOG ERROR-> CAN’T FIND EIS RCS VERSION NUMBER” Actually this is not set and the EIS RCS control variable says NOT SET. Is there a way to set it?

Select 11302A and ignore the error message and it will work. /H?kan

Hi, it's me again... :) I was going to go on with the 11302 checking and tried to connect to TekCATS 2.19, but in the meantime I had updated the firmware to the 3.1 version and TekCATS refuses to