List, I just purchased a FTS 1050A on Ebay it was listed as used but it doesn't work as advertised. The power and alarm lights come on but nothing else functions. I've D/L'd the two operators manuals from If the seller and I come to an agreement I need whatever schematic and circuit diagram(s) that are available. The link on Febo.com for the schematic takes one to the company that purchased Symmetraicon. Any help appreciated. Perrier

Hi Perrier; I have been looking for a 1050A service manual for years with no luck. Please let me know if you find one. I have been considering reverse engineering the schematic.. Best Wishes; Tom Knox SR Test and Measurement Engineer Phoenix Research 4870 Meredith Way Apt 102 Boulder, Co 80303 Formerly of: 357 Fox Lane Superior Co 80027 303-554-0307 actast@hotmail.com https://www.thedenverchannel.com/news/marshall-fire/superior-man-moving-forward-after-losing-dream-research-lab-during-marshall-fire "Peace is not the absence of violence, but the presence of Justice" Both MLK and Albert Einstein ________________________________ From: Perry Sandeen via time-nuts <time-nuts@lists.febo.com> Sent: Friday, August 18, 2023 3:22 PM To: time-nuts@lists.febo.com <time-nuts@lists.febo.com> Cc: Perry Sandeen <sandeenpa@yahoo.com> Subject: [time-nuts] FTS 1050 schematic needed List, I just purchased a FTS 1050A on Ebay it was listed as used but it doesn't work as advertised. The power and alarm lights come on but nothing else functions. I've D/L'd the two operators manuals from If the seller and I come to an agreement I need whatever schematic and circuit diagram(s) that are available. The link on Febo.com for the schematic takes one to the company that purchased Symmetraicon. Any help appreciated. Perrier _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe send an email to time-nuts-leave@lists.febo.com

Perry I do not have schematics. But am willing to help to see if we can figure out whats up. I have the FTS so am familiar with that unit. Yours is newer. But maybe some guessing can help. On the 4050 there is a power supply and space for batteries. The 120 VAC comes into a linear supply and is converted to 24 V. That charges the batteries and runs the Cesium. There are branches off of the supply for the alarms as I recall regulated to 15V. On the 4050 the 24 V goes into the cesium module. This was the point my unit had failed. The electrolytics in the dc boost converter had leaked and destroyed the board. As I figured out the boost converter takes 24V to 31V. Fixing that with an external supply and everything worked. Not saying thats your problem but at least a concept to consider. Especially if you never find schematics. Regards Paul WB8TSL On Fri, Aug 18, 2023 at 10:15 PM Perry Sandeen via time-nuts < time-nuts@lists.febo.com> wrote: > List, > I just purchased a FTS 1050A on Ebay it was listed as used but it doesn't > work as advertised. The power and alarm lights come on but nothing else > functions. > I've D/L'd the two operators manuals from > > If the seller and I come to an agreement I need whatever schematic and > circuit diagram(s) that are available. > The link on Febo.com for the schematic takes one to the company that > purchased Symmetraicon. > Any help appreciated. > > Perrier > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com >

Maybe this will be of some help. I scanned it several years for someone else with your need. My manual is at my Texas location and I won't be back there until November so can't get you any more than this for now. There is nothing in the original manual for the 5Mhz oscillator other than a block diagram, and there are also a couple items that are missing or incorrect. John K0GCJ On Sun, Aug 20, 2023 at 2:20 PM Tom Knox via time-nuts < time-nuts@lists.febo.com> wrote: > Hi Perrier; > I have been looking for a 1050A service manual for years with no luck. > Please let me know if you find one. > I have been considering reverse engineering the schematic.. > Best Wishes; > Tom Knox > SR Test and Measurement Engineer > Phoenix Research > 4870 Meredith Way Apt 102 > Boulder, Co 80303 > Formerly of: > 357 Fox Lane > Superior Co 80027 > 303-554-0307 > actast@hotmail.com > > > https://www.thedenverchannel.com/news/marshall-fire/superior-man-moving-forward-after-losing-dream-research-lab-during-marshall-fire > > "Peace is not the absence of violence, but the presence of Justice" Both > MLK and Albert Einstein > ________________________________ > From: Perry Sandeen via time-nuts <time-nuts@lists.febo.com> > Sent: Friday, August 18, 2023 3:22 PM > To: time-nuts@lists.febo.com <time-nuts@lists.febo.com> > Cc: Perry Sandeen <sandeenpa@yahoo.com> > Subject: [time-nuts] FTS 1050 schematic needed > > List, > I just purchased a FTS 1050A on Ebay it was listed as used but it doesn't > work as advertised. The power and alarm lights come on but nothing else > functions. > I've D/L'd the two operators manuals from > > If the seller and I come to an agreement I need whatever schematic and > circuit diagram(s) that are available. > The link on Febo.com for the schematic takes one to the company that > purchased Symmetraicon. > Any help appreciated. > > Perrier > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe send an email to time-nuts-leave@lists.febo.com >