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A friend in town (W7TOM) just bought an HP 3478A, and we were both very favorably impressed by it. I have a HP 34401A on my bench which I bought brand-new for $1K, and the 3478A is almost as good at

Hi all, I'm looking at getting an HP meter along the lines of the 3455, 3456 or 3457. Its to be used in a small lab. I don't require any remote capabilities. I'm after a meter to carry on from

Hello Gary, read the thread about the HP 8405A Probe repair, the sampling head of the 3406 is quite the same as the 8405's are. And they usually die the same way. 73's Jorgen dj0ud

<dentist@n...> wrote: Hello Arthur, 20 Volts is a bit high, do the measurement at 5 to 10 Volts. The reverse voltage rating of this fast switching shottkys is quite low. Jorgen

Thank you Jorgen. Your reply made me rethink my troubleshooting strategy. I had failed to consider that the diodes are at greater risk of failure, more so than the FET. The bad voltages measured

<dentist@n...> wrote: Hmm, surely, the fet could die, too, but "normaly" the probes fail with shooted diodes! And they could measure nearly OK but some parameters may have changed and so the bridge is

Hi Guys This is my first posting to this group. I am wondering if anybody knows about the "10032A" scope probe? Its a 100:1 probe has 3Mohm 3pF input loading and a max of 300V input. Its a really

I own the manual of servicing the 54111D model .There is only a block diagram for the 3 supplies: One is general and the 2 others are for "digital" and for "analogic" I will receive a second 54111D

Hi all, I hope you all enjoyed the Easter break. I am looking for a site to download a manual for the HP5245L frequency counter. Thank you Gary Beech VK2KYP

Looking to purchase a copy or original manual for the subject equipment. Arthur Shulman VE3ZV

I am saddled with a perfect 8405A with one defective probe. Swapping the sampling board between probe tips shows that the fault follows the board. The measured voltages are correct for the good board,

Like a three year old I looked. Welcome aboard, Dan Tulloss Senior Metrologist National Test Equipment, Inc. 760.639.1700 760.639.1799 fax www.nationaltestequipment.com

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Dear All, I have a 54110D scope which exhibits power supply problems. I've followed the troubleshooting guide in the 54111D service manual which leads me to believe that the analog board is

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Anyone using a 8558B Spectrum Analyzer in a 853A Digital Mainframe... used with a HP 8444A Tracking Generator. I would like to communicate with you...

Hi All, Happy Easter, some time ago I brought a secondhand HP3406A wideband voltmeter. I would like to download the manuals for it. Can anyone please help with a website to do this Thank you Gary

Hi There, I have just brought a HP5385a, unfortunately it did not come with any documentation. I would appreciate any help. The unit appears to work well thank you 73's Gary VK2KYP

Many thanks for your assistance. I now have an excellent copy. Best regards David

Hello group, I'm chasing a 8750A to 8412B interconnect cable. I have found a good source for new ones, but was rather hoping for a cheaper secondhand one. Who has shed full of