开云体育

Date: Mon, 19 May 2025 12:44:52 -03 Does anyone have the manual for the JSR RM3500 automatic modulation meter? Thank you. Marcelo F. Ruiz

Custom front panels are a perennial pain, so a lot of people have tried different ways. You may get some useful ideas from this post and the links in that post.

Hi all, I am thinking of maybe picking up a 4255A Universal Bridge for some fun, but I can't seem to find a manual for it anywhere. Does anyone have a copy of any user or service manuals for this

Re YIG module power supplies. Many (most?) "Modern" YIG modules likely protect themselves (but you'd be wise to assume they do not) from incorrect power sequencing.? However... From personal hard won

The 83711A/B was introduced in the early 1990’s or late 1980’s. The Spectrum Analyzer Division (Santa Rosa, CA) had converted the production line to run on 9000/382’s by that time. I would

Yes, 1206 is rather large. I’ve not opened up the 478A or the other thermistor sensor I have for use with the 432A, one goes to 10GHz and the other to 18 GHz, but I would check into smaller

Sorry, I made a typo the graph title should say inductance in nanohenries (nH) not uH. The measured Ls for the 1206 capacitor is 1 nH. Here's a simulation for the VSWR if the thermistors are not

A couple of people have now mentioned that it's possible to swap the internal caps for 0.1uF parts. I'm still not sure what package will be suitable, especially for the series input cap. A 1206 SMD

I've dumped the three UVPROMs from my counter. The ROMs are attached here in case they could ever be useful to anyone later on. The versions, as marked on the stickers, are: U17 - HPIB Controller:

If you are new to YIG’s then you should be very careful about the fine tune / FM coil as it does not take any currant to burn it out And yes you do need a lot of different power supplies to work on

Yes, thank you. Just found one of the YIGs is shown in one of the files, but the connections shown do not jive with the actual unit PCB. Considering requirements of 40V, 20V, 10V, 5V and one or two

An update: I've extracted the 1345A display unit and examined the boards we spoke about yesterday; I powered it using a bench supply I designed and built myself years ago which I use for all this kind

Have you looked in the ( The YIG ) folder on this sight ? Sent: 19 May 2025 18:11 To: [email protected] Subject: [HP-Agilent-Keysight-equipment] YIG Oscillator Info? I have these

also search this group's archive, this exact question has come up multiple times even just these past few months.

I have these three HP YIGs to check out. I find zero info on them online. I found the "Operating and Service Manual" for a network analyzer one of them came from... no schematics! (How can a "Service"

Indeed, there are such SCPI strings but I couldn't get them working properly as the arguments for those commands are unclear. I did write a software which allows to modify a given EEPROM binary which

Yes it does, and I did re-calibrate them as described by Staffan's document. Tom

Nice work! The 83712Bs are less common and more expensive, so that’s a very worthwhile upgrade. I can see how the empty space reserved for the low-band board was an irresistible temptation. And

I do have a DIY replacement oscillator for the 5334A and 5334B. If interested contact me off group. ed

I wonder if a dump of the EPROMs would show any interesting SCPI strings that might involve writing to the EEPROM so the coefficients could be written without disassembly while also calculating the