Questions tagged [military-surplus]

Questions about military surplus radio equipment, especially related to converting them for amateur radio use.

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3
votes
1answer
123 views

What is this military radio?

Please help me identify this piece of equipment. It looks military spec, but don't know anything about it. I want to look up some history about what it was used for. Here are more photos.
5
votes
2answers
226 views

Can anyone identify this military radio?

Hoping someone can identify the following military radio. I spotted it at the curb and decided to make it a land-fill diversion project...
3
votes
2answers
84 views

Dielectric Constant of Insulation/RF Permeability

I recently purchased a 500-foot roll of military surplus 14 AWG stranded copper wire at a hamfest for next to nothing . It is Prestolite M13486/1-6 (spec sheet). It has very thick chlorinated ...
3
votes
1answer
89 views

What are the parameters and necessary features of a Gunn diode oscillator cavity?

There are a ton of old USSR Gunn diodes available on ebay and I'm looking for a cavity that can make use of them. I am willing to machine one myself if necessary, but I'm unable to find any decent ...
1
vote
3answers
124 views

Suitable acoustic foam rubber for headphones?

These are photos of the headphones that I use in my ham shack. As you can see, the dark gray foam rubber inside is deteriorating, and I need to replace it. It appears to be open-cell foam "rubber" ...
2
votes
2answers
243 views

Identify this “large TNC” coax connector

I have recently acquired a nice looking dummy load on military surplus sale. Being relatively new to the hobby, I assumed the connector on it was something common. Turns out it is not. So far nobody ...
1
vote
1answer
314 views

How is the PRC-152 able to achieve such a wide frequency range?

I am referring to the Harris Falcon III designed for military. It has a frequency range from 30MHz - 870MHz. However, when I look at commercial radios, their frequency ranges are usually limited to ...
1
vote
2answers
204 views

I need help identifying what I believe is a military radio

I'm hoping this question is okay to ask here. While this question is not strictly amateur radio related, I think this is the best community to ask. I'm looking for any information on this. ...
7
votes
4answers
2k views

Shaving Quartz Crystal for New Frequency

Back in the 1960s during my Novice days I operated on the 40-meter band only with 4 different quartz crystals that determined my transmitting frequency with my Eico 720 CW transmitter. I had heard ...