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I?just?received?one?of?Leo?Bodnar's?new?LBE-1322?pulsers.??I?measured?19?ps?rise?time?for?the?1322?vs?15?ps?for?the?11801?calibrator?and?the?two?pulsers?in?my?SD-24?u

Awesome Brian.? Thanx for all the stuff on your k6sti site. -- -Blob

I've noticed that the enclosure of my HP 4342A Q meter can seriously degrade the Q of a physically large coil. I wrote a Windows program that lets you extend the meter terminals with a parallel wire

Thanks much for that input. Mikek

Referenced paper does not include resistive core loss, therefor, incomplete. See https://en.wikipedia.org/wiki/Transformer#Equivalent_circuit "Real transformer equivalent circuit" which includes

Hi John KN5L, I see I forgot the link in my previous post. https://ciapini.wiki.esiliati.org/images/The-four-times-the-impedance-rule-for-broadband-rf-transformer-windings-where-does-it-originate.pdf

Not too far off from expected, see attached SimNEC model for 73 material, 60uH primary, 1:1 transformer, John KN5L

I borrowed a friends NanoVNA and ran a scan. The frequencies below, correspond to 10X, 4X, 3X, 2X, 1X. My Voltage????????????? ?? Using the Divider method??????????? ??

Morris said, "It would be interesting to plot the transformer input impedance across the frequency range with both an open and short circuited secondary." My interested started, because I wanted to

Hi Mike, I think what you are seeing is not unusual. No transformer is perfect. The parallel magnetizing and loss current across the 50 ohms is bringing it down to 46 ohms. At the lowest frequency

Years ago I found graph of Input Z of a transformer vs the multiple of the primary inductance to the drive impedance. Most amateurs us a 4 time multiple, as in 50Ω drive, the transformer primary

Thank you Harold ! I'm going to have to learn to read German? ;-) Saludos, Marcelo - LU2DR

https://elektrotanya.com/philips_pm6301_1khz_rlc_bridge_1968_sm.pdf/download.html

On Tue, Sep 24, 2024 at 07:51 AM, David Holland wrote: Thank you so much David ! Saludos, Marcelo - LU2DR

https://archive.org/search?query=PM6301 /me finds two files, but they appear to be in German, so they may (or not) be of limited use... <lu2dr@...> wrote:

Hello good morning. I have a Philips PM6301 LCR meter that I need to review. I need if someone could send me the circuit and/or the service manual or alignment procedure. Thank you so much. 73,

Do you mean the 190 and 260? Follow the instruction manual to turn on. The power switch is on the Q multiplier knob. Turn it just past the turn on point and allow the meter to warm up for a few

I acquired some 100k Ω 1.6mm glass bead thermistors of the type used in 3D printers for a flow soldering project, but the manufacturer’s characteristics were not available. 0 ° C and 100 ° C

Well, looking at the schematic, if you get a reading on the multiply by Q meter, it would seem good. If you don't get a reading on that meter, it is not necessarily bad, it could be missing a drive

I have had the above Qmeters for some time, which I have not attempted to use. Is there a way to test the thermocouples to see if these units are worth trying to restore? Your attention is