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Re: VNA Resonance Methodology
Renaud, yes this is fundamental stuff. However, there are a lot of fine points within the fundamentals that as a child you don't learn first time around. You couldn't or you'd never progress in the
By Jinxie · #148688 ·
Re: VNA Resonance Methodology
VNA is overkill. Grid dip must be very loosely coupled. Coil as described should be fine. No idea what's " paxolite" check material losses. We used AirDux or fiberglass or lucite cylinders as coil
By Froggie the Gremlin · #148687 ·
Re: HP 10811-60085 (10 MHz OCXO) No hits when searching for data...
The E8663D
By Robert G8RPI · #148686 ·
Re: VNA Resonance Methodology
This is a nice post. I'm learning interesting tricks. Maybe re-learning but that's what "going back to fundamentals" means no? Cheers to all, Renaud
By Renaud F5ZR · #148685 ·
Re: Sticky ink of schematics
Will do. An update, I found exactly what to call this courtesy of someone from EEVblog. Was found thru searching "toner" in the old threads.
By Lexter Negron · #148684 ·
Re: Sticky ink of schematics
I don't know which city you are in. But, many cities, especially big ones, have a public Archive, staffed with professional archivists. I guess... mileage will vary, on the 'experts' ... but I found
By Roy Thistle · #148683 ·
Re: Sticky ink of schematics
https://www.eevblog.com/forum/chat/sticky-ink-of-old-schematics I¡¯m simultaneously posting this on the eevblog for solutions. It¡¯s bad when I come to the foldouts. :/ I have significantly better
By Lexter Negron · #148682 ·
Re: VNA Resonance Methodology
Er..., yes, That's the other thing I got wrong. I've made 49 turns close wound, so I'm screwed on the overall length, the number of turns and the Q. Par for the course for a first attempt (of a young
By Jinxie · #148681 ·
Re: 6632B supply stuck in PROT mode, unable to reset.
OV is for over voltage. That will allow you to follow the troubleshooting flow chart. <michael.rosanbalm@...> wrote:
By Ted Cuff · #148680 ·
Re: VNA Resonance Methodology
I tapped in your coil dimensions into some old software, and with a 31mm former you would need about 42 turns of? 0.4mm wire closed wound to get about 50uH using a 20mm long former. The Q at 1.45 MHz
By jmr · #148679 ·
Re: VNA Resonance Methodology
If half the length (while holding everything else constant), then you get about twice the inductance, so your resonant frequency will be about 70% what you targeted. It is best in general to space the
By Tom Lee · #148678 ·
Re: VNA Resonance Methodology
I think this is where I may have gone wrong. I'm winding this on a 31mm diameter paxoline former with no core as per the formulas. The wire is 0.4mm and the overall length of the solenoid should have
By Jinxie · #148677 ·
File /All HP, Agilent and Keysight instruments in folders by part numbers/5000 to 5999/HP_5315A_Operating_and_Service_Manual.pdf uploaded #file-notice
The following items have been added to the Files area of the [email protected] group. * /All HP, Agilent and Keysight instruments in folders by part numbers/5000 to
By Group Notification <noreply@...> · #148676 ·
Re: VNA Resonance Methodology
To avoid disappointment with the Q that you achieve on your initial attempt, it might be worth it to list what inductance you want and what Q you would be happy with at 1.45 MHz. If I assume 50uH and
By jmr · #148675 ·
Sticky ink of schematics
Hello, I want to scan and save forever schematics I recently found from a warehouse. The problem is the ink. Storage conditions for decades are unknown but I assume this wasn¡¯t kept in an air
By Lexter Negron · #148674 ·
Re: HP 10811-60085 (10 MHz OCXO) No hits when searching for data...
I spotted my mistake as well. The only 10811- I had in my junk box was a -60111 but I decided to try it in spite of not being specified for PN anyway. I also decided to replace a few capacitors around
By Ulf Kylenfall · #148673 ·
Re: HP 8341B 1992 firmware version
Hello, You can find it here: http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=01_ROM_Images_and_Drivers/HP_8340B Regards
By saevar · #148672 ·
Re: HP 10811-60085 (10 MHz OCXO) No hits when searching for data...
It has a looser spec than the standard 10811D/E: Ref https://www.febo.com/pages/hp10811/HP10811-Specs.pdf
By Robert G8RPI · #148671 ·
Re: HP 10811-60085 (10 MHz OCXO) No hits when searching for data...
The OCXO part number is *08662* -60085 not 10811-60085 This is the part number for a rebuilt 10811-60111 Hope this helps
By Robert G8RPI · #148670 ·
Re: VNA Resonance Methodology
And if you want to do a first-order correction for fringing, replace the length with [length + 0.9*radius]. This correction is important if the coil length is not very much greater than the radius.
By Tom Lee · #148669 ·