Ed...
Very good data!
I am curious about one part of the warmup process. At around 7 minutes, the
power jumps up radically, which you attribute to
the outer oven kicking in. It has often been stated on this list that the outer
oven was intended for use during really cold
starts, which I would
I've been doing some more cold start testing, and thought I'd share this
info, for any Z3801A owners who may be curious about the behavior. Some
aspects are probably well known since long ago. I've seen it all since
first starting work on this some 10-12 years ago, so I know
approximately what
On Fri, January 28, 2022 1:41 pm, folkert wrote:
> Now I bought a "Square Wave Amplifier" by BG7TBL (
> https://www.aliexpress.com/item/4000192799858.html?gatewayAdapt=glo2nld=a2g0o.9042311.0.0.3d764c4dMZPAX8
> ). Documentation I could find was a bit vague about the
> output voltage but I
folk...@vanheusden.com said:
> the scope software says 2MHz but output is really 10MHz).
That's one of the joys of digital scopes. You are seeing the interaction of
the sampling rate and the signal frequency.
The chart on the right says the sampling rate is 12 MS/s Try it with a
sampling
and unless you have LOTS of experience, avoid automatic direction
(bidirectional) translators - they are very sensitivie to pullups,
downs etc. I think best avoided unless there is no option. I2C is where
they are useful.
But otherwise, stick to unidirectional level translating as Andrew
> There was a discussion along these lines about using a RasberryPi or Arduino
> for this purpose a while ago on this forum --- try searhing for "WWVB
> Chronverter".
I tried this: https://github.com/hzeller/txtempus/
Works pretty good at a short distance (< 10cm).
Hi
There also are logic families that are 5V tolerant when run off of 3.3V. That
makes finding a “translator” the same as finding any chip from that family.
This may or may not make things easer to do / easier to find.
One of many families is the NC7SZ series. One common gate:
I find that the best way to handle these translations is to use one of
TI's level translators ... each chip has two power supply rails, and
translation is done transparently across the chip, and there is good max
voltage overprotection on both sides as well. I use them a lot to handle
5V <->
Hi,
I bought a GPSDO. It outputs somewhere around 3V. This is connected to a
picdiv and then to a raspberry pi. The picdiv is happy with 3.3v, the rpi
as well. All good.
Now I bought a "Square Wave Amplifier" by BG7TBL (
