[time-nuts] HP-3586B receiver...

[Robert Benward]

Burt
I believe the voltmeter is calibrated for 75 ohms, not 50, otherwise they 
are very similar.  You can apply a dB offset to correct for the measurement 
error,  run the input at 10Kohms, and use a 50ohm feedthrough termination.

I own both (the B is has problems now), but I use the voltage measurement 
capability extensively.  The B is much cheaper on Ebay.

Bob


  ----- Original Message ----- 
  From: Burt I. Weiner
  To: time-nuts at febo.com
  Sent: Saturday, July 24, 2010 4:05 PM
  Subject: [time-nuts] HP-3586B receiver...


  I prefer the 3586-B version.  I think it's more user friendly - once
  you get the hang of it, it does more.

  You can get off-the -shelf adaptors for the weird telco connectors to
  BNC for about $20, but it's simpler to just change out the connectors
  to BNC.  The input module is a plug-in box.  Remove six front panel
  screws, swing front panel out of the way, unplug the input module,
  replace connector, plug in the input module, look for screws you just
  had, replace just-lost screws, try again, and Voilla, normal connectors.

  The detection is only upper or lower sideband.  Mine is GPS
  referenced and I use it for AM, PSK-31, RTTY, as well for FMT's.  I
  live within 4 miles to two 50 KW AM stations and Have never had a
  problem when using my 210' Inverted-V.  The selectable bandwidths
  with common options are: 3.1 kHz, 400 Hz, and 20 Hz.

  Marv Collins, W6OQI came over to our home about 3 years ago to look
  at the one I had at the time (I now have two of the B's).  He said he
  doesn't know how he'd ever use one.  Marv now has two of the B's.

  Burt, K6OQK

  At 12:32 PM 7/24/2010, time-nuts-request at febo.com wrote
  >Subject: Re: [time-nuts] A Highly-Accurate and Stable SDR-IQ Using
  >         GPS-DO and DFS
  >To: "paul swed" <paulswedb at gmail.com>
  >Cc: Discussion of precise time and frequency measurement
  >         <time-nuts at febo.com>
  >Message-ID: <58923.12.6.201.2.1279990884.squirrel at popaccts.quikus.com>
  >Content-Type: text/plain;charset=iso-8859-1
  >
  >Oops. Yes, typo. Sorry.
  >
  >I don't know about the A version but the  and C are essentially identical
  >except the B used wierd Telco connectors. An new adapter might cost as
  >much as you'd pay for the receiver.
  >
  >Their shortfall is the demodulation options are limited, but they do a
  >wonderful job of measuring carrier frequency.
  >
  >Best,
  >
  >-John

  Burt I. Weiner Associates
  Broadcast Technical Services
  Glendale, California  U.S.A.
  biwa at att.net
  www.biwa.cc
  K6OQK