[Elecraft] Speech processing

[Larry Phipps]

Yes, that's the one I had and was referring to... it worked great. I 
knew it was Com-something ;-) Sounds like there are already a couple of 
knockoffs out there.

Larry N8LP



David J Windisch wrote:

> Hi, all concerned:
>
> I have an old Comdel in-mic-line r-f clipper, which uses fewer than 
> 100 discrete parts on a 4X6in board.
>
> What the device does is to heterodyne baseband audio to vlf, put it 
> through a USB filter, limit it, lowpass-filter it, and heterodyne it 
> to baseband. Inband distortion products are kept down this way.
>
> If there's enough interest, it could be resurrected by retrofitting 
> with newer parts, eg, inductors other than telco toroids ;o) and kitted.
>
> If anyone knows of contra indications, do please step forward.  I've 
> done a cursory search for Comdel and its successors and found nothing 
> except old ads and a review in June 1968 HAM RADIO magazine (it sure 
> was a pleasure to reread some Jim Fisk).
>
> I do recall reading that the unwary occasionally fried amps which 
> couldn't stand the increase in average power.  Caveat user.
>
> If anyone wants to hear what the thing sounds like, I could get on 
> 160-10M ssb once I figure out the internal mic connections to my to 
> K2/100. Fingertalk is much easier, for me in any case.
>
> 73, Dave, N3HE
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft   
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>