[TenTec] KR-5 keyer

[Tom Sessions]

Stuart,

I am only guessing that the flip flop helps to control the speed of the 
keying.  A flip flop may not work in the circuit of the KR-5.  Also, even if 
it is a flop flop, a different flip flop may not have the same pin out.

I have found the LU322 IC listed from some exporters who want a minimum 
order of $100.  That, of course, is not worth it for me. I also have to 
consider if it is really the same chip.

Ten Tec Service did reply again to me this morning saying that if there was 
a substitute chip they would have it in stock.

Thanks again / 73
Tom K4RV

----- Original Message ----- 
From: "Stuart Rohre" <rohre at arlut.utexas.edu>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Wednesday, February 23, 2005 02:15
Subject: Re: [TenTec] KR-5 keyer


> Ariel,
> I checked an SK cross reference from the 70's and a couple other IC
> catalogs.  Nothing by that number. (LU 322B.)
>
> Do you see a logo on the chip?  That number does not ring a bell as to it
> being a common chip of a major manufacturer.
>
> Keyers are simple now.   As a last resort, you could reuse the power 
> supply
> in it, and drop in the Ten Tec kit keyer board, unless yours had memories
> and other bells and whistles.  There are some other keyer boards, such as
> the products from Idiom Press which are equipped with some features.
>
> I surely would like to know what is the function of that chip?
> -Stuart
> K5KVH
>
>
>
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