[time-nuts] HP 3586B Selective Level Meter

[Tom Holmes]

For what it's worth, I was at Fair Radio in Lima, OH on Thursday, and they
had three of the 600 ohm 'B' models on the floor. Don't know the condition
or the asking price, but if you are interested you should be able to get the
contact info via Google. They have had these boxes for quite a while as they
were there on my last visit about three years ago, so they might be
interested in making them go away.

Tom Holmes, N8ZM
Tipp City, OH
EM79


> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Robert Benward
> Sent: Saturday, July 28, 2012 6:40 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP 3586B Selective Level Meter
> 
> Chuck,
> Got two of these guys, the "B" and the "C".  The C is the desirable one,
50ohms,
> but you will pay about three times the price.  Use the adapter, it's
> $16 from the link below, it just isn't worth taking apart.  Also, you will
need a
> 50ohm BNC feed thru termination, then set the front panel to 10Kohm input.
That
> will get you back to a 50 ohm input.  Then you need to add approx 1.76dB
to
> correct the display for the change from 75ohms to 50ohms.
> You can use the display offset function.   Assuming this a fancy
voltmeter,
> note that for 0dBm in a 75 ohm system you need 274mV at the terminals.
0dBm
> in a 50 ohm system can only provide 224mV, and thus will read -1.76dBm.
> Thus add 1.76dBm to correct the display.
> 
>       Impedance 50 75 75
>       Voltage 0.224 0.224 0.274
>       Watts 0.001 0.001 0.001
>       dBm 0.000 -1.761 0.000
> 
> 
> 
> 
> Good luck
> Bob
> 
> 
> http://www.milestek.com/s-147-trompeter-connectors.aspx
> 
> 
> ----- Original Message -----
> From: "Chuck Forsberg WA7KGX N2469R" <caf at omen.com>
> To: "time-nuts" <time-nuts at febo.com>
> Sent: Thursday, July 19, 2012 2:22 AM
> Subject: [time-nuts] HP 3586B Selective Level Meter
> 
> 
> > Got one of these massive (by today's standards) beasts the other day.
> > It has the option 003.  Quite the light show when it powers up.
> >
> > I have its external reference daisy chained with a radio and two other
> > instruments sucking 10 MHz from my Thunderbolt.
> >
> > I have not decided what to do with the AT&T front panel input.
> > Should I get a BNC adapter for it?  Or replace it with a BNC
> > connector?
> >
> > --
> > Chuck Forsberg WA7KGX N2469R     caf at omen.com   www.omen.com
> > Developer of Industrial ZMODEM(Tm) for Embedded Applications
> >   Omen Technology Inc      "The High Reliability Software"
> > 10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430
> >
> >
> >
> >
> 
> 
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