[ARC5] HS-33

[Kenneth G. Gordon]

On 9 Aug 2019 at 12:42, Joseph Orgnero wrote:

> Thank you Ken for the info.
> I  was curious as to whether the HS-23 or HS-33 were designed for specific 
> equipment.
> It appears that is a matter of "taste"!
> 73's
> 
> Joe Orgnero  VE7LBI

Well, not necessarily, Joe. The output impedances of the various mil receivers changed 
over the course of WWII.

600 ohms became, at least for the Navy, the defacto "standard", but there were still many 
receivers in use which showed output impedances higher than that.

Higher impedance does give you greater audio sensitivity, and I prefer them for that.

Also the crystal-radio crowd swears by them. For them, the higher the better.

My best phones right now are a set of those from a sound-powered deck-talker set.

The difference in greater audio sensitivity between those and my set of ANB-H1s is quite 
apparent.

However, I used a set of HS-33s (600 ohm) with my RAL-7 for many years and liked them.

Ken W7EKB