Re: [time-nuts] (no subject)

[johnk0...@juno.com]

 Someone with more knowledge/experience than me may know better than to try 
this and will let everyone know not to, but the second harmonic reading on my 
5065A had been gradually decreasing until finally it wouldn't come up at all. 
After trying the same thing you did(not having the equipment to do the 
procedure in the manual) I started changing adjustments after first marking 
their original settings. The second one I tried was the pot(I believe it is 
R29) near center rear looking from above(with the top cover removed, of 
course). It's the one(on my 24xx? if I recall correctly, the latest series 
anyway) with the two white plastic adjustments whowing through a hole about 
1/2" diameter. Sorry I can't give exact information, but I'm writing this from 
memory, as the 5065A is about ten miles away. Anyway, I moved it about an 
eighth turn at a time and on the third try the second harmonic came up. I set 
it, as I recall, to about 32 and it's been working fine for the last couple 
weeks.  As I 
 said, if this shouldn't be done for any reason, hopefully those in the know 
will let me/us know. John K0GCJ

-- Original Message --
From: paul swed 
To: Discussion of precise time and frequency measurement 
Subject: Re: [time-nuts] (no subject)
Date: Mon, 7 Dec 2015 08:29:42 -0500

Jim
Welcome to time-nuts and you were indeed lucky to get a 5065.
Lots of possible items.
But the fact that the last line are all 0 may mean its as simple as the
loop selector being open and not closed. Normally the control would tend to
drift all the way over. On reset it goes all the way left and if it doesn't
find the second harmonic it goes all the way to the right. Easy thought at
least.
Beyond that many possibilities for issues. After all they are old.
Regards
Paul
WB8TSL


On Sun, Dec 6, 2015 at 11:30 PM, Jim/Anna McIntyre 
wrote:

> Greetings all,
> My name is Jim, I'm a Noob to your list.  A local DoD contractor unloaded a
> heap of test equipment lately, and I scored a 5065A.  It's s/n 1532A00666,
> has an Olive green-ish RVFR, and a 00105-6103, series 1284 Quartz
> oscillator.
>
> I have had the instrument powered up for about an hour now. (I first
> checked the +/- 20V supplies and they're OK.)  I have a 1A source connected
> to the TE lines.
> At the end of the 1st hour here's what I'm seeing (Open Loop Mode).
>
>
> Batt 48
> Supply 38
> Lamp Oven 30 (down from 50)
> Cell Oven 30 (down from 50)
> Osc Oven 44 (down from 50)
> Photo 28
> 5 MHz 32
> Control, Error, 2nd Harmonic all read 0
>
>
> I adjusted the Quartz Coarse control to be within 10-7.  Fine is set to
> 250.  Synth output measures 5.315 005 728 MHz, and is about 1.8 Vpp.
>
> Control, Error, 2nd Harmonic all read 0 after I switch to Closed Loop and
> hit 'Start'
>
> Please advise on next steps...
>
> Thanks
> ___
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Re: [time-nuts] HP 3581A question

[johnk0...@juno.com]

Corby ,have you checked the Keysight  tech support site? I didn't have time to 
investigate completely, but they have a 3581a/c operating and service manual 
pdf. John 

-- Original Message --
From: cdel...@juno.com
To: time-nuts@febo.com
Subject: [time-nuts] HP 3581A question
Date: Mon, 20 Jul 2015 11:33:08 -0700

Hi,

I have an HP 3581A and I need to replace the top right hand frequency
pot.

My unit has a dual pot with a concentric shaft.

The only manual I have shows a single pot.

If anyone has a manual that shows the dual pot could you let me know the
values of the pots?

Thanks,

Corby Dawson

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Re: [time-nuts] PRS10 rubidium on eBay

[johnk0...@juno.com]

Yep, that's the one, Corby. I'll let Bill know you're not interested. John

-- Original Message --
From: cdel...@juno.com
To: time-nuts@febo.com
Subject: [time-nuts]  PRS10 rubidium on eBay
Date: Sat, 10 May 2014 12:52:20 -0700

John,

I believe that the unit referred to is a Tracor 308A.
I no longer look to play with the Tracor units (304 308 600 900) as their
performance does not merit putting a lot of work into them. Thanks for
the heads up however!
 
The eBay # for the PRS10 is 321402060170

Corby
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Re: [time-nuts] PRS10 rubidium on eBay

[johnk0...@juno.com]

Corby, a friend of mine has a rubidium standard he wants to sell. I can't 
remember exactly what it is, but I think it's an Austron 504(?) (704?). I sold 
you one many years ago(like 20 or so). They came from one of the ATT microwave 
sites. His number is 308-532-3291 and he lives in North Platte, NE. He's 91 
years old, pretty sharp but nearly blind from macular degeneration and he's 
pretty hard of hearing so he's a bit difficult to talk with. He is on Skype and 
it works better than the landline fone. If you want to try Skype look for 
William O Wesslund. John  

-- Original Message --
From: cdel...@juno.com
To: time-nuts@febo.com
Subject: [time-nuts] PRS10 rubidium on eBay
Date: Fri, 9 May 2014 21:22:34 -0700

Hi,

I'm selling a nice PRS10 on eBay if anyone is interested.

With manual and schematics.

Works great!

Cheers,

Corby Dawson

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Re: [time-nuts] HP 5065A serial number list

[johnk0...@juno.com]

Corby, my 5065A has s/n 2816A01605

John W Cress K0GCJ

 

-- Original Message --
From: cdel...@juno.com
To: time-nuts@febo.com
Subject: [time-nuts] HP 5065A serial number list
Date: Tue, 31 Dec 2013 10:57:33 -0800

As promised here is a list of all the HP 5065A 
units I have come across.
I believe there should be a 08xx prefix out there
as the units first came out in the middle of 1968.
I also think that the 2816A prefix is the last
prefix used. 
Anyone have any others I can add to the list?
Another tidbit, the latest optical unit warrenty
date I have seen is 1993.

Known HP5065A serial numbers

0916-00181  2816A01556
0928-2816A01554
0940-00203  2816A01565
0960A00285 2816A01566
0960A00312 2816A01567
0960A00313 2816A01591
0968A00312 2816A01596
1104A00376 2816A01617
1220A00422 2816A01618
1220A00426 2816A01636
1220A00444 2816A01640
1220A00448 2816A01645
1220A00463 2816A01652
1320A00492 2816A01658
1340A00519 2816A01666
1340A00521 2816A01674
1340A00528 2816A01677
1416A   2816A01688
1420A00613 2816A01693
1420A00651 2816A01697
1532A00725
1736A
1908A00853
1908A00910
2112A01035
2144A01088
2216A01121
2232A01149
2320A01200
2340A01200
2340A01235
2340A01290
2432A01332
2432A01338
2432A01380
2432A01400
2432A01430
2614A01514
2632A01463
2644A01471
2740A01547

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[time-nuts] Cinox source

[johnk0...@juno.com]

I realize this is pretty mundane for such an elite group, but would anyone have 
some information(specifically the pinout) for an EGG Cinox 10Mhz source. It 
has the following numbers printed on it: 10085-0611 and 20296-1891 and has 
three feedthrus labelled E1(orange wire), E2(black wire), and E3(yellow wire) 
and also a connector which is either an SMB or an MMCX(I can never remember 
which is which). Thanks for any and all help.

John K0GCJ



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