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Рет қаралды 2,097

3 жыл бұрын

I repair a Racal Dana 1992 Frequency Counter.
The 1992 is basically the same as the 1991 frequency counter, only it goes to 1300MHz.
The switches on the front panel have failed, so I replace the switches using the ones in the link below.
6x6x11 Switches: defs.link/?u=c4f0feb
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====================
My Electronics Tools (video and purchase links)
====================
Boonton
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4220.
8210: defs.link/?u=e1eddc
Fluke
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8842A:
45: defs.link/?u=eac51d
343A: defs.link/?u=13c93d
540B: defs.link/?u=0c6bd9
5200A: defs.link/?u=a43c99
5450A: defs.link/?u=3c6292
893A.
A90.
HP/Agilent/Keysight
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4261A: defs.link/?u=07ed95
5005A.
5342A 18GHz: defs.link/?u=5f7513
6181B: defs.link/?u=b12aef
8012B: defs.link/?u=ca5764
8648B: defs.link/?u=da52a3
8901B: defs.link/?u=535835
DSOX1102G: defs.link/?u=a68d39 defs.link/?u=12d498
E3646A: defs.link/?u=128f4a
Marconi
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2022D.
2955: defs.link/?u=6f6e5e
TF2103: defs.link/?u=61baaa
Rohde & Schwarz
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SMY: defs.link/?u=93514b
CMU200: defs.link/?u=8ccd72
Polarad SPN: defs.link/?u=2ead82
Siglent
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SDM3065X: defs.link/?u=1ed0fe defs.link/?u=12d498
SDS2102 (hacked to 340MHz): defs.link/?u=1ed0fe defs.link/?u=12d498
SPL-1008.
SDP1168X: defs.link/?u=1ed0fe defs.link/?u=12d498
SDL1020X-E: defs.link/?u=a0eccb
Other Equipment
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KSGER T12 Soldering Iron: defs.link/?u=620ace defs.link/?u=5c112e
Quick 861DW: defs.link/?u=138c0f defs.link/?u=a3fc81
S-993A: defs.link/?u=079677 defs.link/?u=e855a0
EEVBlog BM235: defs.link/?u=12d498
YR1030 Battery ESR: defs.link/?u=c56527
Heathkit IT-12 Signal Tracer.
Racal Dana 1992: defs.link/?u=8eeeba
Bird 43: defs.link/?u=4b18f7
Sinadder 3: defs.link/?u=2bf1dd
Audio Control SA-3050A RTA: defs.link/?u=a04df2
Korad KA3305D: defs.link/?u=69090a
PDVS2mini: defs.link/?u=869ba4
Valhalla 2703: defs.link/?u=06bcfc
Feeltech FY6800: defs.link/?u=8b98cd defs.link/?u=34d101
Eakins Microscope: defs.link/?u=b0278b defs.link/?u=262327
Mustool G600: defs.link/?u=b8bc26 defs.link/?u=33f0aa
Handheld Equipment
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Uni-T UT210E: defs.link/?u=391ce3 defs.link/?u=ea4edc
DER DE-5000: defs.link/?u=0d9160 defs.link/?u=12d498
MK-328: defs.link/?u=0d9160 defs.link/?u=739ee7
MESR-100: defs.link/?u=0d9160 defs.link/?u=009419
ESR Meter: defs.link/?u=0d9160
HOPI: defs.link/?u=7fab55
PeakMeter PM6252: defs.link/?u=59ef66
HS1010: defs.link/?u=10c699
Thermal Camera: defs.link/?u=280cca defs.link/?u=4a2256
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Пікірлер: 20

@1903bretep Жыл бұрын

A very useful video for Racal 199X counter owners with faulty panel switches but what would have made it much more useful is if you had pointed to a source of suitable replacement switches, type, dimensions, pin configuration, manufacturers part number, retailers part number etc etc in fact anything to take the guess work out of it.

@TheDefpom Жыл бұрын

I did in some other repairs on these counters, but they are hard to find, the source I got mine from vanished and I can’t get them anymore.

@normnovotney6697 3 жыл бұрын

That's a great fix! Keep those 1992's humming for another 20 years.

@armandine2 Жыл бұрын

De-stuffing tool [or destuffing repair tool] seems to be a good search engine description too

@Evilduckcreations 3 жыл бұрын

I love watching your repair videos even more than the mailbag videos. I like the new format (separate channels for different subjects." Thank you for posting!

@TheDefpom 3 жыл бұрын

Thanks for the feedback

@richardmiranda5357 11 ай бұрын

Would you please provide with a fresh link for dipswitches. It seems the link in the description is expired.

@tedcuff9155 3 жыл бұрын

I did this switch repair last year on mine. Like someone else mentioned, let the ocxo warm up for about 3 days to stabilize. Also, there is a trick in the service manual to get a 10 second gate time, and get another digit of resolution when you calibrate. I use a gpsdo as a reference for mine, since rubidiums are getting harder to get.

@davidv1289 3 жыл бұрын

EXCELLENT! Nice repair, Scott. Nice to see that counter back in service. If you search for "slotted round nut tool" you will find the tool you are looking for. Also, a razor saw is an excellent tool for cutting plastic and soft metal parts like that IC socket. Thank you for an interesting video, David

@TheDefpom 3 жыл бұрын

Thanks David

@pietroc6337 2 жыл бұрын

Very interesting ! Please let me know which switches do you use. Thank you. Pietro Cremonini

@w9gb 10 ай бұрын

AliExpress web link is Dead. Source for Replacement Switches ??

@IanScottJohnston 3 жыл бұрын

GPIB would help here, you could leave them running overnight and log the results including changes to ambient temps.

@TheDefpom 3 жыл бұрын

Yeah I really need to find the time to play with GPIB... I have all the cables/adaptors!

@zx8401ztv 3 жыл бұрын

Well done, it is a pain in the bum to fix the switch problem :-( i have a racal that has less buttons/features the 1998, but it works ok. It has the same dodgy diaphrams, i bodged them a looooong time ago lol. One day... i'm not holding my breath, may do the job, i did say "may" :-D The ovan was ill when i got it, it was way off and could not be adjusted. On opening up the ovan, a well cooked board and falling apart/cooked foam fell out. I did replace a cooked npo xtal shunt cap and then it became usable, but it drifted if you staired at it hard :-D The communication board held up the start up for ages while looking for a non existant external computer, so that was switched of to stop me going madder :).

@TheDefpom 3 жыл бұрын

The switches are linked in the description if you need some.