AVR-Chat

That was a nice little function they began putting in their tube type 
scopes back in the 300/500 series days and have carried forward to their 
current models.  Makes a really nice buffer amplifier.  7000 series can 
be had for a song these days but be careful that you buy one that works 
because the knobs aren't even available any more.

And please be gentle when you speak of "ancient" things.  I cut my teeth 
on the 545s and 585s back when they were current catalog items...12AX7 
tubes...6AU6s, 12AT7s, 6922s...tuned delay lines.  Still have 2 copies 
of the RCA receiving tube manual that aren't opened very often so as not 
to lose any pages.  Then there were nuvistors...


REB


erikc77099 wrote:

>--- In AVR-Chat@yahoogroups.com, "Doug Locke" <doug@...> wrote:
>  
>
>>I wonder if someone could help me with some advice please. I am trying
>>to use an AVR microcontroller to monitor an analogue signal. The
>>signal is both very low and of high impedance, so initially I wish to
>>experiment a little by using a general purpose amplifier between the
>>source and the AVR. I have found a HP 465A or a Brookdeal 9452 for not
>>too much cash. Does anyone have any experience with either instrument,
>>the HP has fixed gains of 20db or 40db while the Brookdeal is
>>apparently variable 30-100db so either has suitable gain.
>>Thanks for your time.
>>Doug Locke.
>>    
>>
>
>
>My ancient 465 'scope has a output on the rear for the A-channel
>amplifier, which I have used from time to time for just the purpose
>you mention.  It is a very nice feature, and I think some other
>'scopes have it as well.
>
>  
>


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