On Thu, Feb 8, 2018 at 10:51 AM, jimlux <jim...@earthlink.net> wrote:
> On 2/8/18 5:34 AM, Mark Goldberg wrote: > >> What is the phase noise like on the cheap TCXO?Vectron >> > > > VT-702 (the first one in the list online) > -99 at 10Hz > -123 at 100Hz > -143 at 1kHz > > going to Mouser and looking for the cheapest 10MHz TCXO > FOX924 (about $2) - no data > SiT5000 (about ) - -140 dBc@1kHz, -150 dBcfrom 10k to 100k, -160 @ 1M (no > price) > ECS -TXO-3225-100-TR ($2.71 each) - -135dBc @ 1 kHz > ASTX-H11 ($3.16) -130dBc @ 1 kHz, -158dBc @100k > > FOX922CE at 16.369 MHz, -145 @ 10kHz > > > Can you provide a link to the "list online"? I went to eBay and searched for "Vanguard TCXO" and got a list of them with various frequencies. They all specify -125 dBc/Hz at 1 khz, which is concerning of itself, as phase noise generally is higher with higher frequency. They are golden however, so there's that! Vectron and others make decent TCXOs, better than -135 dBc/Hz at 1 kHz, which is what I have measured. I believe none of them are what the original poster is talking about. For a comparison, a Wenzel OCXO I am using for a reference is in the range of -155 dBc/Hz at 1 kHz. I am always wary when no or few specifications are provided. If you look at manufacturer;s like Vectron, they provide lots of data, phase noise at many frequencies, aging, etc. 73, Mark W7MLG _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.