Black or red plug?

[Tiger]

Hello!

I have a question: wich is the difference between the black plug (PL-54) and the red one (PL-354) mounted on the ANB-H-1 headphones? They was both used on flight helmet?

Best regards,

 

[robinb]

I understand that the red plugs denote a high impedance head set while the black ones are for low impedance. Red are for aircraft and black for ground radios.

[38Driver]

Seems like the PL-54 was on the R-14 headsets and the PL-354 was on the ANB-H-1

[pararaftanr2]

Tiger,

38Driver is correct. To answer your other question, yes, they were both used on flight helmets, but for the USAAF, the headsets with black plugs pre-date those with red plugs. For practical purposes, if not updated, you would typically find an A-9 or B-6 helmet with a black plug, but an AN-H-15 or A-11 fitted with a red plug headset.

Regards, Paul

[Tiger]

Hallo!

 

Curiously the set I've seen had the plug PL-54 and the receivers ANB-H-1 instead the more common R-14.

 

Thanks to all!

 

Best,

[pararaftanr2]

Tiger,

The earphones, or the plug, can easily be removed from the wire loom and replaced by using a small screwdriver. This could have been done by anyone, at anytime, in the past 70+ years.

Regards, Paul

[Tiger]

Paul,

 

you're right. It could have been changed somewhere in the past!

 

Again.. and the same headset with the black plug marked PL-540? For which purpose is?

 

Thanks in advance!