As with many others, I had a dim CRT on my R2001D.

I have read many articles about using a Sencore CR-70 to 'rejuvenate' the CRT, but I lacked the CR-70. And, after spending a couple hundred dollars for a used CR-70, I replaced all of the electrolytic capacitors, as I found a few to be bad. The ...

I have two Motorola service monitors, an R2001D and an R2200A that I have been working on, and I lack the standards to calibrate the units, so I was wondering if anyone offers calibration services at a reasonable cost?

So far everything is checking out against all my other test equipment, so I don ...

I have been restoring an R2001C, and I have a problem with the video of the characters not being correct.

The A9 Processor Module, sheet 7, U34, seems to be where I can see the problem, but I believe the problem is before this circuit.

The screen displays a line at the top which looks like the ...

I have been working on an R2001C with minor problems, and I have noticed that the output RF rides on a positive DC voltage of about 3 volts, and I suspect it is NOT normal, IF, I read the schematic right.

On the A5A2 card, there is a circuit that has a bias network tied to the +5 volt bus. Sheet 3 ...

I have two units, one for home and one for work.
The one at work I use to check aircraft antennas with, and the home unit checks everything from 80 meters on up.
I have never had a problem, other than the battery holders cracking in one, and that was an easy repair.
BTW, the work unit has been check ...

I had to replace all the electrolytic caps in my R2001C.

You might want to check yours, but I had to pull them to see the leakage on the bottom.

The AGC/squelch circuit uses a DC voltage from an AM detector and a DC voltage from the
squelch set pot. The voltages are compared and when the ...

Found it on a different board, then realized I goofed with
MPSA VS MPSU, definitely not the same transistors...

Getting old and loosing memory, and other things, sucks...

Someone needed transistors, but, I can't remember, and I didn't tag the message...
I have the transistors, so at least I remembered that!

I have the proper manual, now I just need an extender card.
Time to get out the etchant...

My R2001C has been a challenge, and it has been going easier than I first thought it would,
but... It is still intermittent in some functions. If the generator or spectrum analyzer fail,
the frequency counter still works. Then, when I go back to use the generator, it is working.
And it seems to stay ...

I always go for the equal value capacitance, higher voltage rating, lower
tolerance, and better temp rating, if it isn't the highest rating already.

Of course, I use ceramic for ceramic, aluminum for aluminum, etc.,
or I may substitute aluminum for tantalum, and mica for ceramic, if the
value isn't ...

More than the weight, what is the wind loading? Anchor bolts might handle
static weight, but what about the torsional load when the wind blows?

As you already have limited access, going low quality is not a good idea,
and if you have a failure due to engineering, you may loose that access
if there ...

So my R2001C intermittent operation came down to a connector on the 10 MHz board.

Not just any connector, but an RCA connector... :lol:

After re-tensioning the inner split sleeve of the female and the outer shell of the male,
it stayed playing for over an hour with no hiccups. Since I have a ...

I was able to buy a replacement battery from Newark with the solder tabs.
I don't remember the cost, but it wasn't very much.
Jeff N8CMQ

Hi Mitch,

I have an R2001C that I am recapping.
You may be surprised at how little cap crud you may find,
but still have leaking and bad caps.

My unit has strange black puffy crud in some areas, but not the
typical corrosive damage I have experienced with other equipment.

Some caps show staining ...

If you can use your own scope, it may be wise to get what you want, yourself.
With the price of analog scopes dropping, you can pick up a name brand scope at a reasonable cost.
The used market is flush with high quality equipment, you can take your pick.
I was able to get a 100 MHz, dual trace for ...

Are you still looking for the operation manual?
I have an original R2001D op manual I would sell for $25, if you are interested.
Or, if you have an original R2001C op manual, I would trade even up.

Jeff N8CMQ

We use the Collins cal van at work.
They have a huge trailer that comes to our shop and goes through our test equipment.

It is expensive, but worth it for us.

Jeff N8CMQ

Well, it has been a while, and I still have buggy operation of the R2001C.
I have been replacing dried out and leaking electrolytics on the boards,
but the unit still fails. When it has warmed up, you can watch the spectrum
display loose signals, while the base noise increases. Once this happens ...

Hi All!

It was the coin battery.
The new battery took care of the crc error, and I reprogrammed my most used frequencies and tones.

I am also replacing the lead acid batteries, so it can be portable once again.

Thanks again!

I bought an original manual for my R2001C from http://www.etestmanuals.com/
Give them a a look, they may have what you want.

The battery is dead.
Thanks!

Hi All!
Recently, my 1200 has started to show a CRC error and it clears the stored info in the memory before starting.
My question is, is it the backup battery, or the memory? Any Ideas, anyone?
It sure was a pain loosing the stored setups, now, I have to do everything manually!
Jeff

Hi Glenn,
Someone had epoxied the connectors, and not well either, so I am just going to make a new set of cables.
Another thing I could do, is put some foam rubber pads over the connectors, and let the bottom cover hold them in place.

My Tucker manual arrived on Saturday afternoon, and my monitor was working Saturday evening!
Only five days via media mail for the manual to arrive.
I found that somewhere, someone had trimmed the pins on the ribbon cable connectors, and
replaced a pair of the connectors with 16 pin headers where ...

Thanks Dave!
If the 10 Mhz is missing, I can pull the bottom and check the MOBO.
I wonder how long midia mail takes from Tucker... I like using the proper manual
when I am working on equipment, I gave up drawing my own parts layouts and
schematics when my eyes needed reading glasses...

Thanks Dave.
I have the R2001C manual on order from Tucker.
The unit I have failed last night. It looks like the synth died.
I suspect the crystal may have died, but that is just a WAG...
Time is my problem at the moment, as I have too many things
going on at once.
Jeff N8CMQ

What I was interested in is the maintenance manual.
I bought one through Tucker for $90.00.
I would like to check calibration, which looks good,
but it has been a decade or more since it was done.
Anyone need a R2001A/R2002A maintenance manual?

Hi everyone! My first post, as I couldn't find the info I need in a search.

I purchased an R2001C, but the manual that came with it is the R2001A model.
I would be willing to trade the A manual for the C, if anyone is interested.

I have looked in the usual spots for a manual, but I could not find ...