0
\$\begingroup\$

I have seen a documentary about making BGM-71 TOW (an anti-tank missile - the Iranians make it). You can see it in this link (part 1). I have seen two odd components. In your opinion, what are these components?

The first component is this (at 4:17 minute):

enter image description here

The second component is this (at 4:38 minute):

enter image description here

Here's another picture of the second component (at 4:50 minute):

enter image description here

|improve this question
\$\endgroup\$
  • 2
    \$\begingroup\$ The second component kind of looks like a large wattage resistor. The first, I don't have a clue. \$\endgroup\$ – horta Jun 24 '14 at 12:44
  • \$\begingroup\$ I think it is just a stamp. I watched the video at that point and if you see how it is applied, it doesn't look like a component. \$\endgroup\$ – HL-SDK Jun 24 '14 at 13:11
  • \$\begingroup\$ this^ that looks like a stamp to me too \$\endgroup\$ – Vladimir Cravero Jun 24 '14 at 13:18
1
\$\begingroup\$

Difficult to see from the photos but the second component doesn't look like a resistor to me, but a plated metal enclosure rather like those used to package crystals, only larger.

What's inside it? Not a clue, but my guess would be a SAW filter or crystal filter, physically large enough to need such a case.

These sometimes come in odd packages.

|improve this answer
\$\endgroup\$
  • \$\begingroup\$ I was thinking the same thing, but I could not find any crystals large enough to fit the bill. It could be, as you said, just a metal enclosure for something else. \$\endgroup\$ – sherrellbc Jun 24 '14 at 13:42
  • \$\begingroup\$ There certainly WERE larger crystals in use in the west (WW11 era) but my suspicion is something composite (filter : possibly RF mixer?) rather than a single element. \$\endgroup\$ – Brian Drummond Jun 24 '14 at 13:45
  • \$\begingroup\$ Yes, I have seen the same package for 32.768khz crystal but this is so much big. \$\endgroup\$ – Roh Jun 24 '14 at 14:04

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.