[ARC5] Dynaverters

[Mike Hanz]

That has been my experience as well.  The ~2.5kHz switching note is 
easily filtered out with a low pass filter (and already has a certain 
amount of attenuation in WWII aircraft receiver audio passbands), and if 
one wishes to adjust the output voltage to lower levels (good idea in 
these old sets), it's easier to accomplish than trying to change a 
dynamotor output voltage.

  - Mike

Steve Williams wrote:

>J. Forster wrote:
>
>> I'm curious about how electrically noisy they are (do they whine or whistle?)
>>Does anyone have and specs or manuals or data sheets?
>>
>
>  I have a little experience with them. Electrically they aren't a lot
>quieter in receive than a "good" dynamotor, but even a good dynamotor will
>have a little brush noise now and then and they do eliminate that.
>They do produce an audible high pitch whine but it is way lower than the
>noise produced by the regular dyno's.
>In a quiet room you'll enjoy using them more than a regular dyno. With
>headphones on and the receiver volume turned down, you won't be able to hear
>the whine. That's just how much quieter they are. Sorry, I don't have any
>spec sheets.
>