Link to all of the parts for sale: Here
You can find the searchable Master Parts Sheet (MPS) for the first group of capacitor lots here: Hallman Labs Vintage Parts MPS Aug 27 2018 Pub Ver2
Measurements taken with the Extech 380193 LCR meter include capacitance, ESR (equivalent series resistance), Q Factor, and the inverse of Q-Factor, the Dissipation-Factor. All of these tests are performed at both 120 Hz and 1 kHz. Using 2 test frequencies helps validate the first measurements in the first frequency.
As of August 2018 I have begun to take insulation resistance measurements using my UNI-T UT511 meter. This allows me to calculate the dielectric impedance to DC voltage at or near the actual working voltage of the capacitor. In the same way a person might tell a loved one to get a 2nd opinion from another doctor, using a 2nd meter helps us to validate the first measurements!
I have been impressed by how many vintage capacitors are still testing better than their modern equivalents. Of course, this does not include electrolytic caps, 98% of them are bad after half a century of aging. The only vintage electrolytic caps I know of that still tested well are some from my Sprague “Atoms” collection (will be for sale in the next series of ads).
NOS Paktron Blue Drop C71736-010 .56uF 200V (Lot #3):
The Paktron C71736-010 mylar blue drop style tested strong in ESR and Quality Factor, with low drift during measurement readings. Normal drift such as seen with a WIMA MKT capacitor is below 5%, the Paktron mylars drift is below 3%. Also, the capacitance accuracy are all within 10% at 120Hz and 1kHz!
Dimensions: 0.79″ (L) x 0.31″ (W) x 0.375″ (H)
For Sale Here: http://ebay.us/2yeBOm?cmpnId=5338273189
NOS Paktron 0.033uF 200V FMT69 Blue Drops (Lot #4):
The Paktron 57-10748 mylar light blue drop style tested well for NOS capacitors. Not as great as some of the other groups, but still good numbers besides the one that is slightly outside the 10% territory, I’ll take a lesser offer on that one than the listed price. These capacitors still had low drift during measurement readings. Overall they tested well and are pretty rare style of Paktron caps to run across these days in NOS condition. 2 of these tested VERY good all around, sub 1% tolerance accuracy on capacitance and great Q-ratings!
Dimensions: 0.57″ (L) x 0.565″ (W) x 0.355″ (H)
For Sale Here: http://ebay.us/ZkJvjH?cmpnId=5338273189
NOS EVOX Mini Box MMK Mylar Film 0.15uF 250V (Lot #7):
The EVOX Mini Box MMK Mylar Film capacitors tested very good across the board for NOS (or new) capacitors!!! Some of the higher numbers of the first group of lots, with excellent accuracy for capacitance (all within 10% at 120Hz and 1kHz)! The Q-Rating and ESR look great for this type of capacitor it’s typical, WIMA and ERO Panaserts have similar test numbers. Tested on 7/30/18.
These were the first capacitor group to have Q-Factors beyond 1000, this causes the Extech 380193 to read OL (Overload). So in order to maintain the scale, which changes with the range you have it in by a specific factor each time. So you want to leave the meter in the same setting for all of the capacitors in the group, to do this I used the dissipation factor and took the inverse of it to find the Q-Factor’s value. This is a valid way to get a good estimate, but the resolution of the possible values isn’t great when you only have 0.009 to 0.004 to give you values.
Dimensions: 0.72″ (L) x 0.25″ (W) x 0.51″ (H)
For Sale Here: http://ebay.us/na80hi?cmpnId=5338273189
NOS GE Mylar Molded Black Plastic 0.68uF 100V (Lot #9):
The three GE mylar molded plastic capacitors tested excellent across all measurements! Sub 6% tolerance accuracy for all capacitors in this group. The Q-Ratings are good and ESR measurements look great, competitive with WIMA and EVOX Mini Box. Tested on 7/30/18. These capacitors had low drift, roughly 5% or less drift during testing.
These GE molded plastic capacitors appear sealed tight with no cracks in the plastic and should stand up to almost any environmental abuse.
Dimensions: 1.13″ length x 0.48″ wide x 0.725″ height
For Sale Here: http://ebay.us/yVRYos?cmpnId=5338273189
NOS Sprague 433P METFILM E 0.22uF 100V (from Sprague Lab Engineering Kit) Lot #10A:
The Sprague 433P epoxy coated METFilm ‘E’ capacitors tested impressively well across all measurements! Sub 6% tolerance accuracy for all capacitors in this group. The Q-Ratings are good and ESR measurements look excellent, some of the most consistent capacitor types tested in the first collection of capacitor lots. Tested on 7/30/18. These capacitors had extremely low drift, roughly 3% or less drift during testing.
The capacitors are from an Engineering 433P Lab Kit collection (sourced from a former Sprague Executive estate sale). I have many more of these if anyone is looking to do a bulk purchase, roughly 600 in total, each kit has 30 capacitors in it (made up of 6 values, 5 caps in each). These caps are as clean as it gets and you can’t ask for much better performance numbers. Don’t miss out!
Dimensions: 1.13″ (L) x 0.475″ (W) x 0.725” (H)
For Sale Here: http://ebay.us/szpSsu?cmpnId=5338273189
NOS Sprague 433P METFILM E 0.47uF 100V (from Sprague Lab Engineering Kit) Lot #10B:
Dimensions: 0.9″ (L) x 0.30″ (W) x 0.30″ (H)
For Sale Here: http://ebay.us/hJQEws?cmpnId=5338273189
NOS Sprague 433P METFILM E 1.0uF 100V (from Sprague Lab Engineering Kit) Lot #10C:
Dimensions: 1.2″ (L) x 0.34″ (W) x 0.34″ (H)
For Sale Here: http://ebay.us/w7quhD?cmpnId=5338273189
NOS Sprague 433P METFILM E 0.1uF 200V (from Sprague Lab Engineering Kit) Lot #10D:
Dimensions: 0.65″ (L) x 0.31″ (W) x 0.31″ (H)
For Sale Here: http://ebay.us/Fphzug?cmpnId=5338273189
NOS Sprague 433P METFILM E 0.47uF 200V (from Sprague Lab Engineering Kit) Lot #10E:
Dimensions: 0.95″ (L) 0.34″ (W) x 0.34″ (H)
For Sale Here: http://ebay.us/UomaKJ?cmpnId=5338273189
NOS Sprague 433P METFILM E 0.1uF 400V (from Sprague Lab Engineering Kit) Lot #10F:
Dimensions: 0.95″ (L) 0.29″ (W) x 0.29″ (H)
For Sale Here: http://ebay.us/A82Y0k?cmpnId=5338273189
Used AJAX/Mallory Blue Molded .056uF 200V Lot #37:
These Ajax blue molded tested impressively well across all of the measurements! Sub 9% tolerance accuracy for all capacitors in this group, most under 5%. The Q-Rating and ESR measurements both look both strong and consistent! These capacitors had very low drift, roughly 5% or less drift during testing. These are some of the best testing used capacitors that I have seen thus far, this is why I picked these for use in this ad! These test more consistently across the group than my Sprague Black Beauties and Sprague Bumblebees in ESR, QF, and IR! Capacitance barely changes between 120Hz and 1kHz (on one of the caps it doesn’t change at all!). This shows a strong performance for a variety of circuit operational frequencies (Note: ESR shows similar 120Hz vs. 1kHz strength).
Insulation Resistance is taken for each capacitor, all are within the expected IR value from manufacturer tables, such as from Kemet and Sprague IR vs. Capacitance tables. Minimal drift after initial charging approaches steady state and thus low leakage (250V/(225×10^6) = 1.111×10^-6 amp) The Uni-T UT511 Pro Insulation Tester was used to acquire these values, with accuracy rated at 3% for this meter. Insulation Resistance is a measurement of the dielectric impedance to DC voltage, this is why some older insulation tester are called Dielectric Testers. Drift was monitored throughout testing and was only 10% of measured IR values, after 30 seconds this was below 5%
QTY: 25 (total)
Dimensions: 1.25″ (L) x 0.435″ (W) x 0.435″ (H) | Lead length: is good, between 0.5″ to 1″ leads.
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