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In my Yaks, there are red, green and yellow wires.
Red (+) to headphones
Green (-) headphones
Yellows go to the mic connections.

I would also add - obtain and study the air system schematic. You should be able to narrow down the possible leak points, thus a good starting point for the search.

i.e. in this case, with main va ...

Once my 52 had same symptom. As mentioned, it was "Э6" ТКД501Д0Д relay/kontactor. The "Э7" is the relay/kontactor for ground power.

I believe they can be swapped in a ...

Mostly, it has been said.
- less prime
- less throttle
- learn what your engine prefers

On a hot engine, I would not prime it at all. 1/4 throttle or less, pump for pressure (no prime) and hit ...

https://www.ebay.com/itm/323806995999

I have one of these, worth the entry fee.

[quote="Rob737998"]
I would be interested if other Yak pilots have experienced the same when using a Bose A20.
[/quote]
Yes, I had a similar experience. After flying my 52 for many years ...

[quote="mark.bitterlich(at)navy.m"]Good question about the vernatherm. Early YAK-50's had it. It was removed by a Technical Direction. My 50 did NOT have one installed when I got it, but ...

Ha - 1999 all over again Rolling Eyes

CJ6 guys say buy CJ6s.
Yak guys say buy whatever you want.

Fly both and decide.
Me, if I have to maintain a radial... one will speak to you more than the other ...

I had a lifetime supply given to me by another Yak friend.
Basic dimensions are -
14.5mm OD
9.5mm ID
2.5mm height

I'd try Mcmaster if I were on the hunt.

In almost 20 years, the only leaks I have had on the emergency side were at the emergency valves in the cockpits. There is a square o-ring, #6 in the attachment; this has always been the offender.

10 amp (АЗРГК-10)

I have a good chance of getting some of these it I can get the part number.

How was your last compression test(s)?

I seen this happen a few times. Once with my radio. I could hear the radio go into XMIT however there was no sidetone.
IIRC there are fuses on the tray at the rear. However we had to send the radio ...

[quote="Yakjumper"]Would be interesting to know. The valve in my Yak is sticky, I have to press the lever (on the side of the valve) first, then the start button works. Got a complete new va ...

If it is similar to the Russian compass, it is pretty straight forward.
It can be difficult or impossible to get the back off; they are threaded on and require a watch style pin wrench. Securing the ...

The ADF antenna?? Only thing I can think of in that location.

If the tanks are similar to the Yak-52 (yellow, aluminum), the baffles are riveted from the bottom then welded over to seal. Over time, the welds crack and the tank leaks. Removing the tank and seal ...

Any news about Matt?

Yes, your scuba tank should have a regulator and proper PSI hosing, blah, blah. You should also wear safety glasses and tuck in your tie if you used the suggested lathe.