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

paul swed paulswedb at gmail.com
Wed Nov 19 21:09:58 EST 2014


I know I have some numbers of chroma demod chips as I recall. Picked up in
a flea market special along with other more useful chips.
I absolutely have the LH033 buffers. Fet input and like lots of power. Have
used them as frequency buffers.
Super easy to use. Real chips
Regards
Paul
WB8TSL

On Wed, Nov 19, 2014 at 9:00 PM, Jim Lux <jimlux at earthlink.net> wrote:

> On 11/19/14, 3:59 PM, Dave Daniel wrote:
>
>> I remember the "Fast and Damn Fast Buffer Amp" data sheet. LH0036? I may
>> not be remembering the correct part number.  I used to have a copy of
>> that data sheet, as well as another that was labeled "DC to Daylight" on
>> the data sheet.
>>
>> DaveD
>>
>> On 11/19/2014 2:42 PM, Mike Feher wrote:
>>
>>> Hi Doug -
>>>
>>> Wow. Wonder how many on here remember or know about National's "Damn
>>> Fast" line, HI. I used them all the time, and, still have a few. 73 -
>>> Mike
>>>
>>>
> In the 1984 databook (Blue cover with the yellowing fragile newsprint
> pages) and in the 1975 databook (yellow and green cover, nice quality
> paper). LH0033 and LH0063 are the Fast and Damn Fast buffer amplifiers.  In
> this context the data sheet says 6000V/microsecond.  With +/- 10V into a 50
> ohm load (although you only get 2400 V/us there)
>
> Last two pages in the 84 book are just blank. Last page in the 75 book is
> a description of MIL-STD-883B
>
> Interesting parts.. They aren't kidding when they say you need good power
> supply bypassing and decoupling.(a comment that is in the 84 book but not
> the 75 version) I'm trying to remember what I was using them for: driving a
> YIG tuning coil in a phase locked loop, I think, but it might have been
> driving a fast RF switch.
>
>
> Interesting parts back then.. Does anyone still make or use a LM746
> "chroma demodulator" (other than as a replacement part) or any of the other
> very purpose specific parts for parts of a TV? (like LM1845 signal
> processing, etc.)
>
>
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