[time-nuts] Question about FTS 1050A

[Tom Knox]

My last one was eBay as well.

Thomas Knox



> Date: Wed, 3 Apr 2013 23:15:06 -0400
> From: bobdarby at triad.rr.com
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] Question about FTS 1050A
> 
> Dick,
> 
> If you're asking about the FTS 1050A it was on Ebay.  I believe 
> Symmetricom still sells them but I can't justify buying one from them.
> 
> bob
> 
> On 4/3/2013 10:56 PM, Richard Solomon wrote:
> > Just curious, where are you getting these from ?
> >
> > Tnx, Dick, W1KSZ
> >
> >
> > On 4/3/2013 7:21 PM, Robert Darby wrote:
> >> A little follow-up.
> >>
> >> I looked at all four 1000B outputs with the scope; one pair is at 
> >> 1.2V rms and the second is at .7V rms.  The waveform looks clean and 
> >> is close to the 1.0V and .5V described on the spec sheet so I 
> >> conclude that the oscillator is fine.
> >>
> >> I disassembled the doubler case to check the voltage there and found 
> >> that the voltage regulator is working correctly. There are two 
> >> identical boards inside. The oscillator feeds a Mini-Circuits AK-2(+) 
> >> frequency multiplier directly and each doubled output is fed into two 
> >> identical circuits each with with 4 2n2222's, two diodes, assorted 
> >> resistors and caps thence out through a Mini-Circuits wideband 
> >> transformer TMO4-6.  With the boards on the bench I jury rigged an 
> >> oscillator to drive the input and I get the same low output, albeit 
> >> rather cleaner.  I'm going to order some connectors so I can be 
> >> certain about the signal path and check the doublers again.
> >>
> >>  I wonder if someone needed four low level 10MHz outputs and 
> >> ordered/modified the amplifiers to suit.  I'm not sure they're 
> >> working perfectly but I suspect most of the noise I'm seeing is due 
> >> to my hook-up to the tnc connectors.  I'll know more once I get some 
> >> connectors and meanwhile I'll attempt to draw a schematic of the 
> >> circuit.
> >>
> >> Thanks for everyone's comments; more later.
> >>
> >> Bob Darby
> 
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