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I found an old DIY amplifier that I would like to use, but I ran into a problem: I don't know what kind of connector it has. I know for sure that this device is an amplifier, since I once used it and I even vaguely remember the appearance of the connector (it looked like a jack), but about 10 years have passed, and I can’t remember more.

I remembered that the connectors for this amplifier were short (like jack 2.5) and only with 2 pins (TS). Unfortunately, I don’t have 2.5 connectors on my hands, but it looks like they need more than 2.5 sizes. The 3.5 connector is only slightly larger than the connector on amplifer.

I was surprised by the connectors on the front panel - they are wider than the 3.5 jack (it dangles there), besides, they are too shallow for 3.5 and do not fix the plug. I don't need them, but it would be interesting to find out about them too.

Does anyone have any suggestions what kind of connectors there might be? photos of incomprehensible connectors photos of incomprehensible connectors photos of incomprehensible connectors

photos of incomprehensible connectors

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  • \$\begingroup\$ It looks like a 2.5 mm jack. These were popular on older earpieces. Check with a 2.5 mm drill bit. \$\endgroup\$
    – Transistor
    Apr 2, 2021 at 22:16
  • \$\begingroup\$ @Transistor Unfortunately no. I had to try many connectors before I found the right one. The clue I found - Soviet radio components (capacitors, resistors) - helped a lot. I started looking for Soviet connectors and ... I found it! \$\endgroup\$
    – Alex A.
    Jul 5, 2021 at 21:43

1 Answer 1

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It took a lot of time and attempts to find the right fork. In the end, I succeeded. The photo, as it turned out, shows the "ГК2" connector. ГК2

Accordingly, the "Ш2П" plug is suitable for this connector.

enter image description here

All these are old Soviet (from the USSR) connectors.

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  • \$\begingroup\$ ГК2 (GK-2) is supposed to be 2mm.. that doesn't quite fit with your "slightly less than 3.5mm".. is it actually 2mm? \$\endgroup\$ Jul 5, 2021 at 21:57
  • \$\begingroup\$ @Spehro Pefhany The fact is that I do not have a caliper. Empirically, I realized that 3.5 jack is too big and is not included. Jack 2.5 comes in "ok" but too short. Normally a nail came in, which was larger than jack 2.5. \$\endgroup\$
    – Alex A.
    Jul 5, 2021 at 22:10
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    \$\begingroup\$ I began to search on various sites with used Soviet electronics, on one of which I found ГК2 connectors for sale. In the photo there were many connectors and with different sides. I checked with the existing ones - they matched exactly. Thus, I recognized the connector, and then ordered a plug. The plug fits. Fixes normally. True, I have not connected the speaker yet - I did not have time and speaker for test. However, I'm sure it will work if the amplifier is alive. \$\endgroup\$
    – Alex A.
    Jul 5, 2021 at 22:10

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