I have a GPS derived 10MHz Frequency standard, and a 32 output DA with a DC to 350 MHz bandwidth, it was a video DA for HD video that I converted to 50 ohms. It used the same ICs that I had designed into my circuit, and was in a rack ount case for the price of a couple new ICs.
The GPS unit also outputs time code for computer networks.
Reply by Jan Panteltje●August 31, 20212021-08-31
On a sunny day (Mon, 30 Aug 2021 16:21:28 -0400) it happened Ralph Mowery
<rmowery42@charter.net> wrote in
<MPG.3b9707d12f07f1469899fc@news.eternal-september.org>:
>In article <sgjc4j$qi5$1@dont-email.me>, pNaonStpealmtje@yahoo.com
>says...
>>
>> Ayways crystals and piezos everywhere here...
>>
>>
>
>Too bad that most of the crystal makers have gone out of business.
>Unless you need one that is used in thousands of devices you will pay
>over $ 50 for one cut to your needs. They used to be relative
>inexpensive but with all the two way radios only needing one or two
>common ones instead of a dozen or so that were specially made not much
>volume or money to be made any more.
Yes, PLL chips into the GHz using 10 MHz reference....
OTOH a lot of xtal is on ebay / China.
Reply by Ralph Mowery●August 30, 20212021-08-30
In article <sgjc4j$qi5$1@dont-email.me>, pNaonStpealmtje@yahoo.com
says...
>
> Ayways crystals and piezos everywhere here...
>
>
Too bad that most of the crystal makers have gone out of business.
Unless you need one that is used in thousands of devices you will pay
over $ 50 for one cut to your needs. They used to be relative
inexpensive but with all the two way radios only needing one or two
common ones instead of a dozen or so that were specially made not much
volume or money to be made any more.
Reply by Jan Panteltje●August 30, 20212021-08-30
On a sunny day (Mon, 30 Aug 2021 19:27:19 +0200) it happened Jeroen Belleman
<jeroen@nospam.please> wrote in <sgj4dn$uvg$1@gioia.aioe.org>:
>>>> That in turn rotated the little golden wire to a golden surface plating on the actually crystal and it ripped off.
>>>> Managed to open the crystal and fix it (xtal was about 7 MHz IIRC).
>>>> Some are even simpler:
>>>> https://en.wikipedia.org/wiki/Crystal_oscillator
>>>>
>>>> You can also modify the frequency of quarts crystal:
>>>> https://hackaday.com/2010/05/10/hack-your-crystals-frequency/
>>>>
>>>> You can pull those quite far by changing the circuit capacitance too.
>>>> That is how those quartz PLL circuits work, like for example that in the color carrier locking NTSC and PAL.
>>>>
>>>> And then there are overtone modes:
>>>> https://www.jauch.com/blog/en/how-does-an-overtone-quartz-work/
>>>> and much more.
>>>
>>> That's a very poor article. No picture to illustrate how the crystal
>>> vibrates on an overtone, nothing about overtone oscillator design,
>>> except for the vague 'resonant circuit to amplify the overtone'.
>>> The guy even seems to think that 'applying a voltage' is enough to
>>> make the crystal oscillate. No hint about the difference between an
>>> overtone and a harmonic, either. Pretty much useless.
>>>
>>> Jeroen Belleman
>>
>> It is left to the inteligent reader to guggle for more in depth info.
>> Or read the book I am working on:
>> "The Fart Of Electronics"
>> BTW what happeend to Winfield?
>>
>
>I wouldn't mind a discussion about quartz oscillators here.
Reply by Jeroen Belleman●August 30, 20212021-08-30
On 2021-08-30 15:12, Jan Panteltje wrote:
> On a sunny day (Mon, 30 Aug 2021 14:28:07 +0200) it happened Jeroen Belleman
> <jeroen@nospam.please> wrote in <sgiisn$1gka$1@gioia.aioe.org>:
>
>> On 2021-08-30 11:35, Jan Panteltje wrote:
>>> On a sunny day (Sat, 28 Aug 2021 23:52:17 -0700 (PDT)) it happened Phil
>>> Allison <pallison49@gmail.com> wrote in
>>> <30f6533b-6124-4b56-bb93-ca034597e57dn@googlegroups.com>:
>>>
>>>> Jan Panteltje wrote:
>>>> ================
>>>>> Anecdote
>>>>> Once had to help somebody repairing TVs.
>>>>> He had one that had been around for ages and did not have color.
>>>>> So I asked: What exactly did you do?
>>>>> He replied: Replaced every component in the color circuit but one! it did not help.
>>>>> So, I asked: Which one did you not replace?
>>>>> He replied: That coil, measured it, it was not interrupted, so put it back.
>>>>> I looked at the circuit diagram and that coil had, in the metal can it was in, a capacitor in parallel (tuned to the color
>>>>> carrier).
>>>>> So soldered out that cap, it had a short!
>>>>> Replaced the cap, customer so happy he finally got the thing back..
>>>>> 10 minutes ;-)
>>>>
>>>> ** Nice going.
>>>>
>>>> Only one ever came across a dead, HC49 crystal.
>>>> In the Rx of a 30MHz radio control receiver.
>>>>
>>>> The Rx was tied to the chassis of a 1/10 scale racing car that used a 3.5cc nitro / methanol 2-stroke engine.
>>>> The engine revved in the 30,000rpm range
>>>>
>>>> Must have resonated mechanically with the mounting springs of the crystal.
>>>> Cos when cut open, it was no attached to the springs any more.
>>>
>>> I had a big crystal from some surplus army set in my school days that I used for all sorts of experiments.
>>> After soldering it in projects many times, one of the wires came lose, so you could turn it.
>>> That in turn rotated the little golden wire to a golden surface plating on the actually crystal and it ripped off.
>>> Managed to open the crystal and fix it (xtal was about 7 MHz IIRC).
>>> Some are even simpler:
>>> https://en.wikipedia.org/wiki/Crystal_oscillator
>>>
>>> You can also modify the frequency of quarts crystal:
>>> https://hackaday.com/2010/05/10/hack-your-crystals-frequency/
>>>
>>> You can pull those quite far by changing the circuit capacitance too.
>>> That is how those quartz PLL circuits work, like for example that in the color carrier locking NTSC and PAL.
>>>
>>> And then there are overtone modes:
>>> https://www.jauch.com/blog/en/how-does-an-overtone-quartz-work/
>>> and much more.
>>
>> That's a very poor article. No picture to illustrate how the crystal
>> vibrates on an overtone, nothing about overtone oscillator design,
>> except for the vague 'resonant circuit to amplify the overtone'.
>> The guy even seems to think that 'applying a voltage' is enough to
>> make the crystal oscillate. No hint about the difference between an
>> overtone and a harmonic, either. Pretty much useless.
>>
>> Jeroen Belleman
>
> It is left to the inteligent reader to guggle for more in depth info.
> Or read the book I am working on:
> "The Fart Of Electronics"
> BTW what happeend to Winfield?
>
I wouldn't mind a discussion about quartz oscillators here. Much better
than the endless OT bickering.
I think Win is fine. I saw a message here not so long ago saying so.
Jeroen Belleman
Reply by Phil Allison●August 30, 20212021-08-30
Jan Panteltje wrote:
==================
> It is left to the inteligent reader to guggle for more in depth info.
> Or read the book I am working on:
> "The Fart Of Electronics"
** ROTFLMFAO !!!
> BTW what happeend to Winfield?
** The posturing, pommy "gong beater" picked up his spherical football and shuffled off home.
Never to return......
..... Phil
Reply by Jan Panteltje●August 30, 20212021-08-30
On a sunny day (Mon, 30 Aug 2021 14:28:07 +0200) it happened Jeroen Belleman
<jeroen@nospam.please> wrote in <sgiisn$1gka$1@gioia.aioe.org>:
>On 2021-08-30 11:35, Jan Panteltje wrote:
>> On a sunny day (Sat, 28 Aug 2021 23:52:17 -0700 (PDT)) it happened Phil
>> Allison <pallison49@gmail.com> wrote in
>> <30f6533b-6124-4b56-bb93-ca034597e57dn@googlegroups.com>:
>>
>>> Jan Panteltje wrote:
>>> ================
>>>> Anecdote
>>>> Once had to help somebody repairing TVs.
>>>> He had one that had been around for ages and did not have color.
>>>> So I asked: What exactly did you do?
>>>> He replied: Replaced every component in the color circuit but one! it did not help.
>>>> So, I asked: Which one did you not replace?
>>>> He replied: That coil, measured it, it was not interrupted, so put it back.
>>>> I looked at the circuit diagram and that coil had, in the metal can it was in, a capacitor in parallel (tuned to the color
>>>> carrier).
>>>> So soldered out that cap, it had a short!
>>>> Replaced the cap, customer so happy he finally got the thing back..
>>>> 10 minutes ;-)
>>>
>>> ** Nice going.
>>>
>>> Only one ever came across a dead, HC49 crystal.
>>> In the Rx of a 30MHz radio control receiver.
>>>
>>> The Rx was tied to the chassis of a 1/10 scale racing car that used a 3.5cc nitro / methanol 2-stroke engine.
>>> The engine revved in the 30,000rpm range
>>>
>>> Must have resonated mechanically with the mounting springs of the crystal.
>>> Cos when cut open, it was no attached to the springs any more.
>>
>> I had a big crystal from some surplus army set in my school days that I used for all sorts of experiments.
>> After soldering it in projects many times, one of the wires came lose, so you could turn it.
>> That in turn rotated the little golden wire to a golden surface plating on the actually crystal and it ripped off.
>> Managed to open the crystal and fix it (xtal was about 7 MHz IIRC).
>> Some are even simpler:
>> https://en.wikipedia.org/wiki/Crystal_oscillator
>>
>> You can also modify the frequency of quarts crystal:
>> https://hackaday.com/2010/05/10/hack-your-crystals-frequency/
>>
>> You can pull those quite far by changing the circuit capacitance too.
>> That is how those quartz PLL circuits work, like for example that in the color carrier locking NTSC and PAL.
>>
>> And then there are overtone modes:
>> https://www.jauch.com/blog/en/how-does-an-overtone-quartz-work/
>> and much more.
>
>That's a very poor article. No picture to illustrate how the crystal
>vibrates on an overtone, nothing about overtone oscillator design,
>except for the vague 'resonant circuit to amplify the overtone'.
>The guy even seems to think that 'applying a voltage' is enough to
>make the crystal oscillate. No hint about the difference between an
>overtone and a harmonic, either. Pretty much useless.
>
>Jeroen Belleman
It is left to the inteligent reader to guggle for more in depth info.
Or read the book I am working on:
"The Fart Of Electronics"
BTW what happeend to Winfield?
Reply by Jeroen Belleman●August 30, 20212021-08-30
On 2021-08-30 11:35, Jan Panteltje wrote:
> On a sunny day (Sat, 28 Aug 2021 23:52:17 -0700 (PDT)) it happened Phil
> Allison <pallison49@gmail.com> wrote in
> <30f6533b-6124-4b56-bb93-ca034597e57dn@googlegroups.com>:
>
>> Jan Panteltje wrote:
>> ================
>>> Anecdote
>>> Once had to help somebody repairing TVs.
>>> He had one that had been around for ages and did not have color.
>>> So I asked: What exactly did you do?
>>> He replied: Replaced every component in the color circuit but one! it did not help.
>>> So, I asked: Which one did you not replace?
>>> He replied: That coil, measured it, it was not interrupted, so put it back.
>>> I looked at the circuit diagram and that coil had, in the metal can it was in, a capacitor in parallel (tuned to the color
>>> carrier).
>>> So soldered out that cap, it had a short!
>>> Replaced the cap, customer so happy he finally got the thing back..
>>> 10 minutes ;-)
>>
>> ** Nice going.
>>
>> Only one ever came across a dead, HC49 crystal.
>> In the Rx of a 30MHz radio control receiver.
>>
>> The Rx was tied to the chassis of a 1/10 scale racing car that used a 3.5cc nitro / methanol 2-stroke engine.
>> The engine revved in the 30,000rpm range
>>
>> Must have resonated mechanically with the mounting springs of the crystal.
>> Cos when cut open, it was no attached to the springs any more.
>
> I had a big crystal from some surplus army set in my school days that I used for all sorts of experiments.
> After soldering it in projects many times, one of the wires came lose, so you could turn it.
> That in turn rotated the little golden wire to a golden surface plating on the actually crystal and it ripped off.
> Managed to open the crystal and fix it (xtal was about 7 MHz IIRC).
> Some are even simpler:
> https://en.wikipedia.org/wiki/Crystal_oscillator
>
> You can also modify the frequency of quarts crystal:
> https://hackaday.com/2010/05/10/hack-your-crystals-frequency/
>
> You can pull those quite far by changing the circuit capacitance too.
> That is how those quartz PLL circuits work, like for example that in the color carrier locking NTSC and PAL.
>
> And then there are overtone modes:
> https://www.jauch.com/blog/en/how-does-an-overtone-quartz-work/
> and much more.
That's a very poor article. No picture to illustrate how the crystal
vibrates on an overtone, nothing about overtone oscillator design,
except for the vague 'resonant circuit to amplify the overtone'.
The guy even seems to think that 'applying a voltage' is enough to
make the crystal oscillate. No hint about the difference between an
overtone and a harmonic, either. Pretty much useless.
Jeroen Belleman
Reply by Jan Panteltje●August 30, 20212021-08-30
On a sunny day (Sat, 28 Aug 2021 23:52:17 -0700 (PDT)) it happened Phil
Allison <pallison49@gmail.com> wrote in
<30f6533b-6124-4b56-bb93-ca034597e57dn@googlegroups.com>:
> Jan Panteltje wrote:
>================
>> Anecdote
>> Once had to help somebody repairing TVs.
>> He had one that had been around for ages and did not have color.
>> So I asked: What exactly did you do?
>> He replied: Replaced every component in the color circuit but one! it did not help.
>> So, I asked: Which one did you not replace?
>> He replied: That coil, measured it, it was not interrupted, so put it back.
>> I looked at the circuit diagram and that coil had, in the metal can it was in, a capacitor in parallel (tuned to the color
>> carrier).
>> So soldered out that cap, it had a short!
>> Replaced the cap, customer so happy he finally got the thing back..
>> 10 minutes ;-)
>
> ** Nice going.
>
>Only one ever came across a dead, HC49 crystal.
>In the Rx of a 30MHz radio control receiver.
>
>The Rx was tied to the chassis of a 1/10 scale racing car that used a 3.5cc nitro / methanol 2-stroke engine.
>The engine revved in the 30,000rpm range
>
>Must have resonated mechanically with the mounting springs of the crystal.
>Cos when cut open, it was no attached to the springs any more.
I had a big crystal from some surplus army set in my school days that I used for all sorts of experiments.
After soldering it in projects many times, one of the wires came lose, so you could turn it.
That in turn rotated the little golden wire to a golden surface plating on the actually crystal and it ripped off.
Managed to open the crystal and fix it (xtal was about 7 MHz IIRC).
Some are even simpler:
https://en.wikipedia.org/wiki/Crystal_oscillator
You can also modify the frequency of quarts crystal:
https://hackaday.com/2010/05/10/hack-your-crystals-frequency/
You can pull those quite far by changing the circuit capacitance too.
That is how those quartz PLL circuits work, like for example that in the color carrier locking NTSC and PAL.
And then there are overtone modes:
https://www.jauch.com/blog/en/how-does-an-overtone-quartz-work/
and much more.
I have heard, but not confirmed, that real audiophiles can tap a crystal and hear the frequency, just like a tuning fork...
;-)
Reply by Phil Allison●August 29, 20212021-08-29
Jan Panteltje wrote:
================
> Anecdote
> Once had to help somebody repairing TVs.
> He had one that had been around for ages and did not have color.
> So I asked: What exactly did you do?
> He replied: Replaced every component in the color circuit but one! it did not help.
> So, I asked: Which one did you not replace?
> He replied: That coil, measured it, it was not interrupted, so put it back.
> I looked at the circuit diagram and that coil had, in the metal can it was in, a capacitor in parallel (tuned to the color carrier).
> So soldered out that cap, it had a short!
> Replaced the cap, customer so happy he finally got the thing back..
> 10 minutes ;-)
** Nice going.
Only one ever came across a dead, HC49 crystal.
In the Rx of a 30MHz radio control receiver.
The Rx was tied to the chassis of a 1/10 scale racing car that used a 3.5cc nitro / methanol 2-stroke engine.
The engine revved in the 30,000rpm range
Must have resonated mechanically with the mounting springs of the crystal.
Cos when cut open, it was no attached to the springs any more.
..... Phil