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From: Mike Monett
X-Mailer: Mozilla 2.02 (Win16; I)
Subject: Re: Amplifying stage with *negative* Voltage gain??
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Date: Thu, 12 Dec 2002 08:51:58 -0800
NNTP-Posting-Date: Thu, 12 Dec 2002 08:51:59 EST
Organization: Bell Sympatico
Paul Burridge wrote:
> It's coming straight off the osc. The idea of the e/follower stage was
> to act as a buffer for the osc. But the output level of the osc itself
> still holds up fine with both the e/follower and probe hooked up to
This was one of my original questions - what are you using for an
oscillator, and why do you need an emitter follower?
What kind of oscillator are you using? Can you post the schematic or give
us a url?
> > Is the signal-source built on that same bit of stripboard?
> > Sharing the same power rail even?
> Yes and yes.
What's Stripboard? If it's what I think it is, you'd be much better off
using copperclad as a ground plane, especially at these frequencies.
There are many different styles ranging from Ugly to Manhattan. For
quickies, I use an ordinary hot glue gun to mount components. If you scrb
the copperclad with steel wool before starting, and keep your fingers off
it, the hot glue sticks fairly well. When it's time to make another
circuit, the parts can be removed without damage.
I saw in other posts you are interested in working at higher frequencies,
such as 40MHz. If so, you need to work with a ground plane for your
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