Products > Test Equipment
Tektronix CMC251 Frequency Counter
xrunner:
Just got this in - a Tek CMC251 Freq. Counter, 1 HZ - 1.3 GHz. Listed on Ebay for parts or not working, but it seems to work perfectly. It's displaying my 10 MHz frequency ref right now. Another score, this one for $70. Will open it up and post some pics later.
dom0:
When did Tek crank out all this rather low-end gear like this counter or the CDM250 and so on?
rdl:
If that's from the lot of many (8 was it?), I almost bought one also. I backed out at the last minute because there was no detailed photo of the actual unit I would have been sent. I was was burned that way once, five of an item available but photos only of one, and of course it was the one in the best condition. The one I received was considerably worse looking.
Anyway, yours looks good. I'm looking forward to see what's inside, and $70 was a fair price. Most often those C series Tektronix devices are way overpriced, I guess because of the Tek name. I got a CPS250 not long ago for $99, which isn't bad I guess.
rdl:
--- Quote from: dom0 on April 15, 2015, 08:30:52 pm ---When did Tek crank out all this rather low-end gear like this counter or the CDM250 and so on?
--- End quote ---
Around early/mid 90s, but I don't know when they first became available or when they were discontinued. BK Precision also sold their own versions of many of these "Basic Bench Test Instruments", as Tektronix called them. In the pdf copy of the 1993 Tektronix catalog that I have, the standard 1.3 GHz CMC250 list price was $495, the CMC251 added a "High Stability Time Base" for an additional $50.
xrunner:
--- Quote from: dom0 on April 15, 2015, 08:30:52 pm ---When did Tek crank out all this rather low-end gear like this counter or the CDM250 and so on?
--- End quote ---
Sometime in the '90s. I see chip date codes in this unit of '97 - '98.
They had a line using the same enclosure style. I've got several of the DMMs (CDM250). Gave one away in the beginner's contest. Then there's this Freq. counter (CMC251). I've also seen a function generator, and there may be more things as well.
--- Quote from: rdl on April 15, 2015, 08:32:06 pm ---If that's from the lot of many (8 was it?), I almost bought one also. I backed out at the last minute because there was no detailed photo of the actual unit I would have been sent. I was was burned that way once, five of an item available but photos only of one, and of course it was the one in the best condition. The one I received was considerably worse looking.
--- End quote ---
Yea that's the lot. They were listed a while back for $100 a unit, but I wrote the guy and said that was a lot to ask for if it's listed "for parts or not working". He took them down and told me he would re-list them later for less, and he did. I took a chance on them because I also got two working CDM250s listed the same way for dirt cheap, and they both worked just fine, so I thought this was worth a chance.
--- Quote ---Anyway, yours looks good. I'm looking forward to see what's inside, and $70 was a fair price. Most often those C series Tektronix devices are way overpriced, I guess because of the Tek name. I got a CPS250 not long ago for $99, which isn't bad I guess.
--- End quote ---
Yea I've seen this counter listed for well over $200. Let me get the case off and we'll take a look. :)
As I was typing this -
--- Quote from: rdl on April 15, 2015, 09:29:07 pm ---Around early/mid 90s, but I don't know when they first became available or when they were discontinued. BK Precision also sold their own versions of many of these "Basic Bench Test Instruments", as Tektronix called them. In the pdf copy of the 1993 Tektronix catalog that I have, the standard 1.3 GHz CMC250 list price was $495, the CMC251 added a "High Stability Time Base" for an additional $50.
--- End quote ---
^^^ Thanks for the info. That concurs with the chip date codes.
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