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@arlut.utexas.edu>
To: "Discussion of Ten-Tec Equipment" <tentec@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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