Ok guys, I hope someone can help. I am looking for the attached part MT51. It is a frequency mixer, I believe double balanced in a TO-8 package.

I think its specs are similar to the SRA-1 from mini-circuits. I was hoping to identify the manufacture or possibly even find a replacement in the same TO-8 package.
I'm not familiar with the company marking, so maybe someone here is.

Thanks for any help that anyone can provide.

 

What is the part designator? Zoom out a bit on your picture so we can see a bit more of the circuit. How many leads? Perhaps a picture of the bottom.

 

maybe you can find logo here:
https://how-to.fandom.com/wiki/How_...d_circuit_(chip)_manufacturers_by_their_logos

 

What is the part designator? Zoom out a bit on your picture so we can see a bit more of the circuit. How many leads? Perhaps a picture of the bottom.

The part designator is just an arbitrary assiginment, 4 leads and I misspoke before its a TO-5 package i believe.

 

maybe you can find logo here:
https://how-to.fandom.com/wiki/How_...d_circuit_(chip)_manufacturers_by_their_logos

I looked through that already and could not find the logo, thank you though.

 

The part designator is just an arbitrary assiginment, 4 leads and I misspoke before its a TO-5 package i believe.

The designator commonly is a good indicator of what the part is. R = resistor, L = inductor, Q = transistor, etc. Often, a mixer will have a "U" designation.

 

The designator commonly is a good indicator of what the part is. R = resistor, L = inductor, Q = transistor, etc. Often, a mixer will have a "U" designation.

The designation is X

 

Hello,

An X as designator can be a crystal, ceramic resonator or crystal-oscillator:
https://en.wikipedia.org/wiki/Reference_designator

Bertus

 

Hello,

An X as designator can be a crystal, ceramic resonator or crystal-oscillator:
https://en.wikipedia.org/wiki/Reference_designator

Bertus

It's none of those.

 

If anyone in the future is looking, I did track down the manufacture. It was originally Tele-Tech Inc. Now called Emhiser Tele-Tech.

And as I stated before it is a double balanced frequency mixer in a TO-5 package.

Thank you all for trying to help.