I have an 8405, fortunately in excellent condition, along with the BNC adapters,
the resistive splitter and the 50-ohm line samplers. The probe tips are very
delicate and are probably unobtainium these days. The electronics in the probes
can be repaired. I've been careful with mine and had no failures, but I did
repair another one many years ago. (See:
http://www.peakbagging.com/Electronic/HP8405A%20repair.pdf)
One can digitize the analog outputs which I did for some test or another about
40 years ago.
Wes N7WS
On 7/30/2019 5:30 AM, Bob kb8tq wrote:
Hi
The 8405 is a fine device and with working probes can be very useful to have
around. Without the
probes .. not so much. Since they have been around since the 1960’s, the probes
may have seen
quite a bit of wear and tear.
For comparing standards, an RPD-1 and a DVM will kind of / sort of do the same
thing. A pair
of RPD-1’s and a quadrature hybrid into a pair of DVM’s (or ADC’s) will very
much do the same thing.
Bob
On Jul 30, 2019, at 2:04 AM, Perry Sandeen via time-nuts
<time-nuts@lists.febo.com> wrote:
Yo Bubba Dudes!,
I've been following the discussion of the FSA3011 with great interest.
Now I'm not in the upper levels of TN esoteric knowledge or have a burning
desire to ever get there. After seeing some small reference somewhere I
looked at the HP 8405A on ebay and the price range seemed comparable to the
FSA3011. Now the HP 8405 is a huge beast but i was thinking that it might be
easier for me to use. I'm interested in just 5 and 10 MHz oscillator
comparison. I know nothing about computer programs or writing any code.
I also looked at the TAPR TIC.
So my conclusion are:
The FSA3011 may be technically the best BUT it seems to be having some teething
problems and I don't really know about what programs it runs or needs.
The HP 8405A is a big beast, but it maybe simpler for me to run and get the
results I want which is stopping around 10 to ^12th. But I may have to watch it
for a long time.
The TAPR TIC is small (needed) cheaper (also a plus) and seems to run available
software. but needs a dedicated laptop, which is not a real problem. I also
have several extra HP 18011's available.
Your opinions are gratefully solicited,
Regards,
Perrier
Perrier
If I can just download programs AFAIK I could use the TAPR TIC as I have a
spare laptop that I could dedicate for its use. The two advantaages
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