[time-nuts] ks... answers The emails are getting long

Bob Camp kb8tq at n1k.org
Thu Nov 20 18:58:28 EST 2014


The only time I ever used them, it was inside the loop with an op-amp. That probably reduced the impact of non-ideal behavior. 

Getting back to the box that started all this. It’s got what looks like a high(ish) power linear amp already on the board. It’s made up of discrete parts. I have no idea how it’s hooked in, but it’s there.


> On Nov 20, 2014, at 7:17 AM, Gerhard Hoffmann <dk4xp at arcor.de> wrote:
> Am 20.11.2014 um 13:04 schrieb Bob Camp:
>> Hi
>> As I recall, the whole LH series was a multi chip rather than monolithic IC approach. Even back in the day, that made them expensive parts. There are other parts that make fine 10 MHz buffers that only cost a dime.
> We had them in our ultrasonics systems for material testing. They were NOT well-behaved.
> Among others, vastly different rise & fall times and Tpd.
> They were gone as soon as Comlinear presented the first current feedback amplifiers.
> regards, Gerhard
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