16KHz crystal by NEL, NOS, Lot of 5, US $320 – Picture 0

16KHz crystal by NEL, NOS, Lot of 5, US $320 – Picture 1

16KHz crystal by NEL, NOS, Lot of 5, US $320 – Picture 2

16KHz crystal by NEL, NOS, Lot of 5, US $320 – Picture 3

16KHz crystal by NEL, NOS, Lot of 5, US $320 – Picture 4

16KHz crystal by NEL, NOS, Lot of 5, US $320 – Picture 5

16KHz crystal by NEL, NOS, Lot of 5, US $320 – Picture 6

16khz Crystal By Nel, Nos, Lot Of 5

US $320

Kalamazoo, Michigan, United States
Jan 29th

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Crystal, 16.000 KHz (marked), NOS. Case similar to HC-13 except wire leads dia .033" instead of plug-in pins. Freq. marked on top; front reads: NORTHERN ENG. LABS NE-34XY Date code 7 - 80 Case, w/o leads, is about 1.5" long UNTESTED. CAUTION: LF crystals can be low Q and may not work in all circuits. ALSO they may tend to jump to or oscillate at harmonics -- be sure your circuit can discriminate against this. Maybe try a 74HCU04 (analog amp biased) with selected RC filter driving the crystal. An LC trap may be required for the 3rd harmonic. Do a variation of parameters to be sure your circuit can start and is stable. DO NOT EXCEED EXCITATION POWER LIMIT of 100 uW (.1 mW). UPDATE: Tested one unit in the circuit shown in the 4th picture. Startup took about 2 sec and the circuit would start at just over 2 V supply. Counter shows 2 Hz high, but that's to be expected if the crystal is calibrated for a series resonant circuit. Counter has been calibrated against a 5 MHz navy surplus ovenized standard which itself has NOT been checked against a higher authority. Scope is 2 Volts per div. and the first picture is at a supply voltage of 5 Volts and the second at 10 volts. Looks "happier" at 5 Volts. 100K resistor was designed to limit the drive to about 50 uW. Asymetry of the waveform is likely due to the asymetry of the CD4049 itself -- may look better (5 volts only) with an 'HCU04. I have some 'C04s but have been unable to determine if they are truly single stage amplifiers. Data was with the variable cap fully meshed (140 pFd) -- as I lowered the value, the frequency went slightly higher and finally the circuit quit working. R(0) circuit is difficult to get a reading due to the critical nature of the frequency. Manually sweeping about 16 KHz ocassionally gave a meter reading, so I used a storage scope and got a peak reading of about 8 Volts P-P. For the unit tested that's about an R(0) of 18 K Ohms. NOTE: Quoted shipping is for small First Class package -- 13 oz. limit. This auction for a lot of 5 units. My item #236

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	NEL Northern Engineering Labs
Country/Region of Manufacture	Unknown
Model	NE-34XY (??)