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Source for 784 MHz crystals?
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John Crane
May 19, 2021, 10:12:33 PM5/19/21
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Does anyone know of a source for 784 MHz crystals?
I'd like to try to 'accurize' the timer in the HP-45 calculator.
-John
I'd like to try to 'accurize' the timer in the HP-45 calculator.
-John
Lucifer
May 20, 2021, 7:11:45 AM5/20/21
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>-John
John Crane
May 20, 2021, 11:42:14 AM5/20/21
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John Crane
May 20, 2021, 11:42:36 AM5/20/21
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On 5/19/21 9:12 PM, John Crane wrote:
Kendrick Kerwin Chua
May 20, 2021, 5:59:33 PM5/20/21
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In article <1680d0b7e9b61e85$2$1693209$e8dd...@news.thundernews.com>,
You probably found this link already:
https://davidreaton.com/hp-calculators/hp-45/
I got to that link from the opposite direction, in that I used to modify
video game systems and we'd use custom oscillators in place of crystals in
order to mess with the region or the video output timing. So the timing
circuit that Mr. Reaton uses in place of a 784 kHz crystal works on the
same valid principle.
-KKC, wandering around the abandoned world of Usenet like the Omega Man.
--
-- "People with happy families don't become spies. A bad | kendrick
childhood is the perfect background for covert ops. You | @
don't trust anyone. You're used to getting smacked around, | io-nyc
and you never get homesick." - Michael Westen, /Burn Notice/ | .com
John Crane <john_c...@yahoo.com> wrote:
>On 5/19/21 9:12 PM, John Crane wrote:
>> Does anyone know of a source for 784 MHz crystals?
>> I'd like to try to 'accurize' the timer in the HP-45 calculator.
>>
>Make that kHz.
>On 5/19/21 9:12 PM, John Crane wrote:
>> Does anyone know of a source for 784 MHz crystals?
>> I'd like to try to 'accurize' the timer in the HP-45 calculator.
>>
You probably found this link already:
https://davidreaton.com/hp-calculators/hp-45/
I got to that link from the opposite direction, in that I used to modify
video game systems and we'd use custom oscillators in place of crystals in
order to mess with the region or the video output timing. So the timing
circuit that Mr. Reaton uses in place of a 784 kHz crystal works on the
same valid principle.
-KKC, wandering around the abandoned world of Usenet like the Omega Man.
--
-- "People with happy families don't become spies. A bad | kendrick
childhood is the perfect background for covert ops. You | @
don't trust anyone. You're used to getting smacked around, | io-nyc
and you never get homesick." - Michael Westen, /Burn Notice/ | .com
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