Microwave and Wireless Synthesizers: Theory and Design, Second Edition
by Ulrich L. Rohde (Author), Enrico Rubiola (Author), Jerry Whitaker (Author)
Is now available for preorder on Amazon, with a scheduled availability
date of May 11, 2021. I've preordered my copy, looking forward to it.
On Fri,
I didn't realize before that there was a picture attached in the OP.
That's a lot different from the HP ones. The crystal element looks more
like those in regular packages, but on the large side, due to the low
frequency. If it's a 1 MHz, then you should be able to find plenty of
representative
I just took a quick look. I have four of these ovens, definitely marked
for the HP5110A. One is partly disassembled so the crystal can be
pulled. It looks very much like the one in the picture that Jeremy put
up. There are two quite large mica caps mounted on a disc-shaped board
along with the
Stamp on the top is 1000 kHz in Russian.
David N1HAC
On 2/28/21 6:35 PM, Dan Kemppainen wrote:
Hi All,
I've picked up a couple of old crystals. Mostly because they look
neat. They are 1Mhz, in a glass tube. The quartz is ~25mm dia, at
about 1 mm thick. Was able to get them to oscillate using
> I've picked up a couple of old crystals. Mostly because they look neat.
> They are 1Mhz, in a glass tube. The quartz is ~25mm dia, at about 1 mm
> thick. Was able to get them to oscillate using a Colpitts circuit. They
> will oscillate at 2.851Mhz (probably some strange mode) if given the
> chan
I've got one with a similar shape crystal wafer but packaged in a glass
HC6/U package. However most of the glass-packaged crystals I've seen have
been in a small vacuum-tube style package with a long, narrow strip of
crystal. I think 16kHz is the lowest I've seen.
On Mon, Mar 1, 2021 at 12:10 AM B
I have some similar, that came from some old HP OCXOs. They look like
they were built inside octal tube envelopes, without the pin bases. I'm
pretty sure they are 1 MHz, and came from some HP51110 (I think ?)
reference generators, part of one of their ancient synthesizers - it was
a two-piece r
On Sun, 28 Feb 2021 18:35:57 -0500
Dan Kemppainen wrote:
> If any of you have any suggestions on where to find information on how
> to get something like this to oscillate properly, guess at correct
> parameters, or even measure any of the parameters I would really
> appreciate it.
The best w
Hi
Best guess is that it’s a 1 MHz fundamental. Your magic circuit is
running it on the third overtone.
Past that:
AT cut? Probably.
32 pf load? maybe.
Heated application? maybe.
Russian manufacture? yup
Bob
> On Feb 28, 2021, at 6:35 PM, Dan Kemppainen wr
Hi,
If you have access to a Network Analyzer, either Scalar or Vector, you
can measure the crystal parameters. You need a test fixture (homemade)
to convert the impedance to 12.5 Ohm and you sweep the crystal to obtain
its serial resonance and the -3dB points. From these there are formulas
t
Is that a PR Peterson Radio logo?
On Sunday, February 28, 2021, 03:53:32 PM PST, Dan Kemppainen
wrote:
Hi All,
I've picked up a couple of old crystals. Mostly because they look neat.
They are 1Mhz, in a glass tube. The quartz is ~25mm dia, at about 1 mm
thick. Was able to get them to
Does anyone know how many of its “first family” of frequency standards HP
made? That would be the HP-100A (starting in 1943) through HP-100E (ending
1967). Just curious—I have a 100E, made in or after 1961.
Jeremy
--
Jeremy Nichols
Sent from my iPad 6.
___
OK went through the outer oven today and have a schematic on it now. Pretty
interesting. The outer oven powers from the -8.5V bus while the inner oven
powers off of the +15V bus. I guess in that way to some extent the power
consumption is somewhat balanced between the ovens.
Have added a small regu
Bob could be. No matter it works and I might agree at this point since the
whole oscillator draws 6 ma. Its no buffer amp. Plus the output goes to a
2K resistor to feed the coax.Its been on 12 hours and is fairly stable.
Simply have the unit wrapped in several layers of cloth.
One last thing before
Hi
> On Feb 27, 2021, at 9:38 PM, paul swed wrote:
>
> Well some progress actually made. Ripped the oscillator out of the assembly
> and removed the rest of the material surrounding everything. Now have a
> schematic at least 90% correct. Part of the issue seems to be rotting
> solder joints. Af
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