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Date
Re: HP 3335A PSU woes PMD12K60.
I am still trying to find the time to get back to it but it may end up becomming more of a winter project looking at the bench at the moment. I understand that there may be many more hidden issues to
By Karl Fell · #129228 ·
Re: HP8560E SA Display oddness
Jaap - thank you that's a great find! Now ....? how did you get to that control? I have the cover off and can't see how to get to that board! Thanks Dan
By [email protected] · #129227 ·
Re: Hp 8590a spectrum analyzer
I checked the shotky diodes in first mixer and they beep in both directions with the meter in diode check. .262 volts. Not a continuous beep but a short one. Also it spears both ends of the diode are
By Richard Cook <richardcook331@...> · #129226 ·
Re: E4418A/4419A vs N1913A/1914A
Perhaps someone dialed in an offset? Press the green preset button to put the instrument back to its normal state and see if that fixes the issue.
By Dave Smith · #129225 ·
Hp 8590a eeprom problem.
I'm having a issue with a fail code 1310 . Of the 16 leds number 4 and number 12 are lit, but this problem go's away sometimes.? I think the revision is 11,12,86.the service manual is kinda
By Richard Cook <richardcook331@...> · #129224 ·
Re: Should I be worried?
The 70900A/B Local Oscillator module contains a Tadiran TL5104/P battery. It maintains the SRAM contents, including basic configuration info and any stored DLPs. I don't know what's causing the
By Dave McGuire · #129223 ·
Re: Should I be worried?
Did you check the battery for memory backup ? not sure the 70000 has battery or not but the module should easy to remove for inspection
By Yue · #129222 ·
Re: HP 5086-7906 YTO
I have 2 HP8563E both bought with dead YTO. and both YTO has aged BJT that has insufficient gain to keep the oscillation happen. The new original YTO is not obtainable, so I modified the YTO driver
By Yue · #129221 ·
Re: Hp 8590a spectrum analyzer
Thanks! But I have one. Used to install coaxial networking in a distant past!
By Anders · #129220 ·
Re: Hp 8590a spectrum analyzer
Thanks. Did not know that! 50 ohm I guess?
By Anders · #129219 ·
Clear screen protector for 16702 touchscreen?
I have my 16702b apart right now.?? I was pondering adding some clear screen protector over the touchscreen. Large sheets of generic film are available inexpensively.?? I couldn't find any past
By Tony Jones · #129218 ·
Re: Hp 8590a spectrum analyzer
Yes, there should be a termination on the LO output. ?The YIG drives a balanced splitter, with one leg going to the mixer and one to the front panel jack. ?Without the termination, the LO injection
By WA2SCL_Jeff · #129217 ·
Re: HP8560E SA Display oddness
8560E - the display characters are not so good Hi Dan and others, Found the problem, at least in my case. It's the DISPLAY CUTOFF adjustment. I did not adjust anything else for the time beeing, just
By Jaap Rusticus · #129216 ·
Re: Power meter advice
One problem in the 437B design is that some parts of its power supply are powered up whenever the instrument is plugged in, but the front panel power switch is "off". I've had several 437Bs, three or
By Dave McGuire · #129215 ·
Re: Power meter advice
I was using the Hp 436A in the 1980s, and the 438A was a significant improvement, in being able to read forward and reflected power from a dual directional coupler, for example, with built in math
By John Lyles · #129214 ·
E4418A/4419A vs N1913A/1914A
Can anyone explain the major differences between these two series of power meters? I have a number of E4418A/4419As and they have proven reliable and easy to use, except for one which does not
By Jim Schatzman · #129213 ·
Re: FS: (US) HP 83525A and 83522A RF Plug-ins for 8350A/B Sweep Generator
The HP 83522A has been sold. Thank you for looking. The HP 83525A is still available and ready to ship. Details are here:
By gk5220@... · #129212 ·
Clamp tip for hp current probe
Hello All, I have an hp 01110-61601 Current Probe that needs the clamp which threads at the tip. Does anyone have any of these they would be willing to part with? Thanks in advance. Christopher Tucker
By Christopher Tucker · #129211 ·
Re: Which Vector network analysis book to buy - help
Yup, got that one. While I do like that book, it's a bit too academic, and I'm more on the practical side. My favorite is "Algorithms" by Robert Sedgewick. Being goal-oriented is good. Despite the
By Dave McGuire · #129210 ·
Re: 5245L warm up
From the units I have and use about 45-60 minutes is reasonable. I use an external reference to drive them so they are stable very quickly. Paul WB8TSL
By paulswed · #129209 ·