As the signal path is continuous, assuming 50 Ohms, it itself does not give a hint to the operation frequency, except that it might be rather high. One specific piece is the distance from the active element to the power connection which might be a quarter wavelength apart form the output of the element. So I guess the operation frequency to be in the lower GHz range, maybe 2-3GHz, so it is not really to high. If the active element is broken you might try to replace it with one of your recently studied amplifier elements.
PIN diode switch for an early RADAR set, or radio altimeter. Made in 1949 from the date codes, and used after an ionisation type switch to rapidly switch in the receiver to the transmit horn. Directional couplers and absorbers to attenuate the transmit pulse down for the receiver.
It reminds me of the bias-T devices we used in cellular tower mounted amplifiers back around the late ‘90’s and early 2000’s. The power connection was SMB 48 VDC feeding one side of a capacitor for dc bias feeding the amp located just behind the antennas. This device you have has more ports with loads, so I suspect some kind of microwave combiner with dc bias for a LNA of some sort. But that’s just a guess. I’m looking forward to learning what you figure out about this one.
Geez, do you have sutures in your left index finger? Hope not. Do you know if that old hack still works with that MSO oscilloscope? I just found a sale on the 5074 model . Arrow electronics is selling it for $560. Any info would be appreciated
As I have gotten older, I am more cautious spending money on unidentifiable devices like that. Things that I cannot make an educated guess about. Well not more than fifty cents or a dollar.
I know exactly what that is. It is a ham shack paperweight
That's one way to put it!
As the signal path is continuous, assuming 50 Ohms, it itself does not give a hint to the operation frequency, except that it might be rather high. One specific piece is the distance from the active element to the power connection which might be a quarter wavelength apart form the output of the element. So I guess the operation frequency to be in the lower GHz range, maybe 2-3GHz, so it is not really to high.
If the active element is broken you might try to replace it with one of your recently studied amplifier elements.
PIN diode switch for an early RADAR set, or radio altimeter. Made in 1949 from the date codes, and used after an ionisation type switch to rapidly switch in the receiver to the transmit horn. Directional couplers and absorbers to attenuate the transmit pulse down for the receiver.
The only problem with this is that the sma connectors used were not designed until 1958 so this puts this as 60's or later
@@StreakyPthere's "75" marking on the side
It reminds me of the bias-T devices we used in cellular tower mounted amplifiers back around the late ‘90’s and early 2000’s. The power connection was SMB 48 VDC feeding one side of a capacitor for dc bias feeding the amp located just behind the antennas. This device you have has more ports with loads, so I suspect some kind of microwave combiner with dc bias for a LNA of some sort. But that’s just a guess. I’m looking forward to learning what you figure out about this one.
My guess is that it is a transmit / receive (T/R ) switch.
Try feeding it 5 or 10 volts and see what it does if you feed it a signal!
.. Its a 3 dollar RF splitter.
sutures in your finger? did you run out of electrical tape? 😊
it was way past tape or glue 😎
Geez, do you have sutures in your left index finger? Hope not.
Do you know if that old hack still works with that MSO oscilloscope? I just found a sale on the 5074 model . Arrow electronics is selling it for $560. Any info would be appreciated
yes I got a boo boo and two stiches.
go read the eevblog forum, I'm sure folks are still talking about that scope hack.
ohhhkey.....
As I have gotten older, I am more cautious spending money on unidentifiable devices like that. Things that I cannot make an educated guess about. Well not more than fifty cents or a dollar.
Black rubber baby buggy bumpers