Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread Mike Millen
. Hence wanting to convert 15MHz to 10MHz. D. -Original Message- From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of paul swed Sent: 18 September 2019 13:11 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 15Mhz in 10MHz out? David Its

Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread paul swed
I missed the part about the signal on and off. Was thinking you always wanted the signal on. Exactly as Bob says grab the lock signal and gate the 10 MHz. The gate can be many things even a relay. Regards Paul. On Wed, Sep 18, 2019 at 2:00 PM Bob kb8tq wrote: > Hi > > Why not just grab the

Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread David C. Partridge
...@lists.febo.com] On Behalf Of paul swed Sent: 18 September 2019 13:11 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 15Mhz in 10MHz out? David Its been quite a while but either 5 or was it 10 MHz comes from the OCXO. There were pictures of the tap off points. So it could

Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread Bob kb8tq
Hi Why not just grab the “lock” signal and use that to disable your existing 10 MHz output? That sounds like a lot less work. Bob > On Sep 18, 2019, at 3:08 AM, David C. Partridge > wrote: > > Having seen the recent discussion of the NB3N502 and other PLLs for > frequency multiplication.

Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread David C. Partridge
...@lists.febo.com] On Behalf Of Bruce Griffiths Sent: 18 September 2019 13:54 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 15Mhz in 10MHz out? Dual JK flipflop configured as divide by 3 producing a 33% duty cycle 5MHz output which is filtered to extract the 10MHz

Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread David G. McGaw
There are simple circuits that can do a 50% duty cycle /3, then double to 10 MHz and filter.  You can search for Divide by 1.5. David N1HAC On 9/18/19 8:54 AM, Bruce Griffiths wrote: > Dual JK flipflop configured as divide by 3 producing a 33% duty cycle 5MHz > output which is filtered to

Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread ew via time-nuts
One  dual D with an XOR gives you a 50% duty cycle Bert Kehren In a message dated 9/18/2019 10:09:43 AM Eastern Standard Time, bruce.griffi...@xtra.co.nz writes: Dual JK flipflop configured as divide by 3 producing a 33% duty cycle 5MHz output which is filtered to extract the 10MHz second

Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread paul swed
I did look at my notes I only have the ocxo version no RB. There is a tap point that delivers 10 MHz. This needs to be buffered and filtered. Both easily done. Paul WB8TSL On Wed, Sep 18, 2019 at 10:09 AM Bruce Griffiths wrote: > Dual JK flipflop configured as divide by 3 producing a 33% duty

Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread Bruce Griffiths
Dual JK flipflop configured as divide by 3 producing a 33% duty cycle 5MHz output which is filtered to extract the 10MHz second harmonic component. Bruce > On 18 September 2019 at 21:08 "David C. Partridge" > wrote: > > > Having seen the recent discussion of the NB3N502 and other PLLs for >

Re: [time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread paul swed
David Its been quite a while but either 5 or was it 10 MHz comes from the OCXO. There were pictures of the tap off points. So it could be a bit easier for you grab that 5 or 10 MHz and run it through the chip to multiply. If 10 MHz then just filtering as I recall. Regards Paul. On Wed, Sep 18,

[time-nuts] 15Mhz in 10MHz out?

2019-09-18 Thread David C. Partridge
Having seen the recent discussion of the NB3N502 and other PLLs for frequency multiplication. I'm wondering if anyone knows of a similar *small* IC that will convert 15MHz to 10MHz ? Why? My current modifications to the KS24361 output 10Mhz signals regardless of whether the unit has lock. ISTR