Electronics Forum / Equipment / October 2007

I am looking for MRD500 photodiode.
Does anyone can advice me where can I get this part.
Thanks in advance.
Alexander .

when an oscope is advertised as 100 MHz scope  what exactly is
the useable bandwidth ?
my 100Mhz scope only has Horizontal divisions down to .05 usec
which means 5 x 100 MHz periods squashed into  a division, yes ?

Looking for schematics and/or service literature on HP 54601A O-Scope.
Triggering failed gradually, finally not triggering at all.
Thanks for any response!

looking for schematic or any ifo on a sorensen 20-50d power supply. I have
one that is a basket case and I would like to find out info on at least the
transformers. One looks lie it may have been line powered and the other
looks like an SCR switched inverter transformer. Any info ...

I have a systron donner freq counter I want to modify to use LEDs instaed of
nixies. I really like the nixie tube readout but I am having to replace the
drivers too often. My plan is to remove the tracks connecting the 7490
counters to the nixie drivers and to etch away the ...

What is the lower frequency that the HP851B can analyse ?
Thank
Gaetan

Hi all !!!
I need the user manual of GOLDSTAR FC-2130 frequency counter.
Can anyone help me with a pdf ?
Thanks in advance and have a good day !

I have a spectrum analyzer with 50ohm input. It is marked the max.
30dBm/50VDC at the input. The 30dBm roughly calculates to be 136dBuV
at 50ohm impedance. The signal i am observing has frequency components
at f1,f2,...fn with magnitude close to 110dBuV. I did not understand

What I;m doing now is doing test of a rf signal generator.
When I turned it on, it showed Uncal warning and generated no rf
signal.
Meaning of  error code was that PLL is unlocked.

We got some problems with HP/Agilent 4194A Impedance/gain-phase
analyzer.
It get stuck when the equipment starts up.
The error message shows "CPU_A RAM R/W error. 40000H".

I'm looking for an Advantest R3361C spectrum analyzer memory card.
Checked with several web services but no luck. It comes in 32 K (A09505)
and 128 K versions (A09506). These are early versions of PCMCIA cards
and probably do not conform to current standards. They are 54mm (W) x 86

I have an original Fluke 87 (not 87 III, 87 IV etc) that has a rather
annoying fault.  If I put a new alkaline battery in, it goes flat in a month
or so.  This is with the meter being switched off (dial in the off position,
not relying on auto-power-off) and unused.  Otherwise as ...

Does anyone know how to calibrate this? Made in the UK.

  I'm working on an A8000 that seems to have a flaky power suppy.
After changing the electrolytic caps, the stink is gone but after
sitting, it still blows fuses.  On 12V input, it still blows the 7.5A
fuse.  If I change it, turn it back on, it works. I've ran it all

Hello,
I've got the 12khz chirp problem but followed the posts here and still can't
seem to get it going. I would greatly appreciate any help.
I find nothing that others have done will restore operation, even partially.