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If you plan on using and maintaining your 8753 than I strongly recommend for you to get you a powermeter and sensor , 4418A/B (E441A) have gotten fairly cheap ($200-300 but sometimes you can catch one

Why would it matter if incandescent bulbs were operated on AC or DC? As for a source of bulbs, how about multiple bulbs normally used for automobile signals and markers? They tend to be more efficient

Even if the lights on your bench don't cause interference, how about the myriad other devices in a typical home and neighborhood? I spent a weekend with a friend in a nice mountain camp that was lit

Lothar: That was a good warning!? Yes my A5 Sampler is a part number 5087-7001. My donor unit only has P/N 5087-7000. The donor unit was an OPT11, which may explain the difference in Samplers. I

A few comments on this , I have hardly ever seen any issues with the signal processing past the sampler , as far as changing the sampler keep in mind that the R and A,B channels use a different part

the ESD diodes wouldn’t go bad due to excess power , consider a few things here first of those diodes are high impedance not 50ohm they are in essence Zener diodes as a result they dont dissipate a

I checked all the cables around A5 which is the Sampler attached to Port 1. These all look good physically. I am unable to change the response by moving them or shaking them. Next, I will remove the

Hi John: That is good information. That may be an alternative later. I am evaluating circuits where I need about 100dB of dynamic range. As such, I think its important to avoid this modification if at

Greetings, Jumping in late here. Curious - why not use a linear (not switching) regulated DC power supply to drive incandescent lamps? Then, if you so desired, you could even have dimmer control.

Does anyone now how to contact Tobias Pluess? My email got bounced because his address has changed. Tobias please email me off line regarding software you wrote. Peter

The backlight works fine, you can see it shining through but it shows no content

Ozan said about checking the PPL2 unlock indicator on A10A6 naming HUL2 as the test point which should be at zero volts for normal operation. However, the service manual only refers to TP1 in this

John is a friendly guy, I am sure that even if they aren't on the github, he would release them. -Chuck Harris wrote:

Even lower emission. Battery and filament bulb.?? Heck, AC Line filament bulbs may still be available in some territories, for "special purposes". The downside is heat output, and electrical power

Hi, I am looking for a copy of the above service manuals in either paper or electronic format. I already have the user and installation manual(s) for both. Sadly Google failed to find anything :-(

You have to be very cautious about doing this , the problem with this approach is that the switches are no longer protected from ESD

Thanks Chuck!? I looked around for it, but I guess I missed it.? I'll check again. Bob

FYI, the board is pretty simple, and I think John Seamons has the CAD files on his github. If so, you could make your own for about $40 plus the beaglebone. -Chuck Harris wrote:

I'm getting occasional ERR 7.5 from one of my 5370As.? I see that the beaglebone board is history now.? So, do I have any options for fixing this? Bob

I had some success in repairing the switches on a couple of 6GHz 8753D's that I bought in known "parts" condition.? In both cases, an ESD protection diode in the switch had gone short circuit,