[bars] Motorola R2001DHS

[Richard Heckbert]

Hi Juan,

Congratulations on the new piece of kit.  Sounds like a great addition.  Back when I was teaching electronics at a trade school, we would get all our equipment (that we couldn’t do ourselves) repaired and calibrated at Hayes Instruments in Billerica.  They’re located just south of Billerica Center on Boston Rd.  They were a great company to deal with then and looking at their website, it appears they do the kind of calibration you’re looking for

https://hayesinstruments.com/

Just another option for you

Rick – W1OLU

From: bars <bars-bounces at w1hh.org> on behalf of Juan Jiménez via bars <bars at w1hh.org>
Reply-To: Juan Jiménez <k1cpr at bd5.com>
Date: Tuesday, June 10, 2025 at 11:25 AM
To: w1hh <bars at w1hh.org>, "mmra at groups.io" <mmra at groups.io>
Subject: [bars] Motorola R2001DHS

https://wiki.w9cr.net/index.php/Motorola_R2001D

On Sunday I drove down to PA to pick up a Motorola R2001DHS (an R2001D with the high stability oscillator option).

Wow. This thing is the most complete piece of radio test equipment I have ever been able to find (and afford), even if it was made in the 1980's. It was worth the 14 hour drive there and back, and the reminder than all of Central PA smells like manure this time of the year. It makes the Swiss Army Knife look like something that came out of a box of Cracker Jacks.

  *   Spectrum Analyzer
  *   Duplex Generator
  *   Modulation Oscilloscope
  *   Frequency Counter
  *   AC/DC Digital Voltmeter
  *   RF Wattmeter/Signal-Level Meter
  *   General Purpose Oscilloscope
  *   Multimode Code Synthesizer
  *   Distortion/SINAD Meter
  *   Sweep Generator
  *   DTMF Encode/Decode
  *   Printer Port
I missed the auction for the one with the coffee maker option. 😆

Frequency range is 10 kHz to 999.9999 MHz with a resolution of 100 Hz. Output in 50 ohms is 0.1 uV to 1 Vrms on FM and 0.1 uV to 0.4 Vrms on AM.

The monitor mode measures frequency from 1 MHz to 999.9999 MHz. The auto-ranging CRT display has a resolution of 10 Hz for frequency error. Input sensitivity is 1.5 uV for 10 dB EIA SINAD. The spectrum analyzer has a 75 dBm dynamic range.

Anybody know anyone who works on calibrating these? The service manual is straightforward (and hefty) but I don't have the additional equipment to do the calibrations.

And no, this one is not going to Ukraine unless I find a sponsor with deep pockets who wants to buy it for them. Too expensive for that, way out of my meager charity budget...

73,
K1CPR
Juan
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