[TenTec] Headphones for ORION I?

[Stuart Rohre]

Charles,
You may only need a better impedance matching to have your present 
headphones work well.   The best sensitivity head phones are any of the 
old communications high impedance phones used in the War radios or post 
war in ham stations that are 2000 to 15,000 ohms impedance.  Even 600 
ohm avaiation phones may work on your set.

Your existing phonesa re probably low impedance such as 8 ohms.  You may 
need to transform the audio to a higher voltage to improve your reception.

If you do find a set of older high impedance phones, they will be suited 
for a narrow frequency range which will give you some filtering.  But, 
they will need cushions to be comfortable, for the old phones were hard 
bakelite cases.  You should get a bag of round sponges from Walgreen's 
or other drug store chains, and cut out a donut from them, ie put a hole 
in center over the earphone sound holes.  Attach the sponge with double 
sided Scotch tape and you will have the most comfortable cusions you 
have seen.  The foam sponges I am describing are small cell foam, and 
thus very soft.

A bag of them was $2 a couple of years ago.

-Stuart Rohre
K5KVH