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I have advocated washing the assembled keyboards with 91 or 99% IPA before on this board. It changes the character of the keys from something that feels like you are going to do damage, to something

This is most interesting, thank you for the help! 2 of 3 instruments does not respond according to the manual. John and Joe, have you tried your instruments with GPIB? I suppose there could be a error

I do not think the reconstruction has to be that comprehensive. The MAR type devices have the same pinout except for one lead which is power on the stock amplifier and ground on the MAR amplifier.

Thomas - My 8901B gives exactly the same responses as Joe's 9802A.. John - WB4YJT

Hi, Have you tried asking them for a sample? you would be surprised what results a nice letter or even email can get. Robert G8RPI

I know this is an old post but did anyone ever come up with the wiring for this cable? Regards, Tom

Hi fellows, Looking for ONE small rod 50 ohm resistor for repair one terminator. Found same model at Emc-rflabs.com TRM 4-12 50 but price and minimal quantity out of my budget.

<hp_agilent_equipment@...> wrote: For maximum measurement speed you could use one of the following commands, depending on what voltage range you already know you want to use:

Hello all. Broke the indicator cord on my 8555a. Is there a good fix? Are there supposed to be very small pullies on those posts that are now lost on the floor? Is there any way to get the output from

Now that I see how they're made, I can understand why lubrication should not be necessary. I plan to disassemble mine and give it the treatment. That nasty clicking is unnerving. Thanks, Barry - N4BUQ

I wondered about that too but advice on this forum was "no, clean and leave dry" and that's what I did. So far it seems fine, I guess I'll need to check again after another 30 years of use or so.....?

Good thoughts, David and Ignacio. It should be fairly straight forward to cut out and rebuild the traces on the A9 board to accommodate the new Minicircuits amplifier. Especially since only the

As Ignacio points out, these parts are designed to operate in a transmission line environment so a daughter board will be difficult to implement. The pins on the package from Minicircuits are probably

Hi Thomas, I have a HP 8902A and the command structure is very similar to the 8901A. If this helps, here are the responses: The response to 21.0SPCL was 1111.000 The response to 61.0 SPCL was 0.0 The

The video on the page really helps! Thanks, Barry - N4BUQ

There is this from Roberto Barrios: http://www.rbarrios.com/projects/HPSWITCH/ Also, I have written about this a few times on this forum. Search for my posts. Vladan

Hi Adrian, Okay - I may give that a try. I wonder if there was any grease originally in the mechanisms that has dried up and possibly should be replaced after cleaning? Thanks, Barry - N4BUQ

David: Send me your address privately and I'll mail you one for free... Dan in Chandler, AZ

Dear Michael, I've found this old post, the only one talking about this argument, and following your suggestions I tryed to upgrade firmware on my 8591E to the H version. I have the new CLIP version

Hi Barry, short answer is yes, that is the reason and the fix is dead easy and really effective, if my experience is anything to go by. There is a parallel thread running where I and others have