[bars] Motorola R2001DHS

[Juan Jiménez]

Well... It's alive, ALIVE!!! Bwahaha!!!!

Heh. I think.

But clearly it needs some work, cleaning pots, calibration and testing. It
used to be owned by the Coast Guard, and it has a green cal label, which
sez it was calibrated and working like a champ!

Back in 1997.

I think I was in Puerto Rico that year, about to bail to Texas thanks to a
close encounter with a random shooting event while walking to lunch. Ah
yes. Texas. A decision that did not turn out entirely well.

But I'm happy it didn't start smoking. One thing is dead, for sure. The
battery pack. But it's not so important. I can replace the cells. Maybe.

73,
Juan
K1CPR

On Tue, Jun 10, 2025, 11:24 Juan Jiménez <k1cpr at bd5.com> wrote:

> 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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