I designed and build a simple 1 bit DRAM Tester so I could test 4164 and 4864 DRAM chips.

I specifically needed to test HM4864P RAM chips to repair a HP 3561A DSA.

0:00 - Intro.
1:30 - Beginning assembly of the 4164/4864 DRAM tester.
5:15 - Build completed.
7:10 - Testing power supplies.
8:01 - Initial testing of the 4164 DRAM tester.
9:08 - Discussion prior to testing a HM4864P-2 DRAM.
10:16 - My 4164/4864 DRAM Tester Project on PCBway: https://defs.link/?u=a28c167
10:36 - Testing a HM4864P-2 DRAM.
14:25 - Patreon Supporters: https://defs.link/?u=fcb3a1

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====================
My Electronics Tools (video and purchase links)

Boonton

8210: https://defs.link/?u=e1eddc

HP/Agilent/Keysight

3457A.
4261A: https://defs.link/?u=07ed95
5342A 18GHz: https://defs.link/?u=5f7513
6181B: https://defs.link/?u=b12aef
8012B: https://defs.link/?u=ca5764
8648B: https://defs.link/?u=da52a3
8901B: https://defs.link/?u=535835
DSOX1102G: https://defs.link/?u=a68d39 https://defs.link/?u=12d498
E3646A: https://defs.link/?u=128f4a

Marconi

2022D.
2955: https://defs.link/?u=6f6e5e
TF2103: https://defs.link/?u=61baaa

Rohde & Schwarz

SMY: https://defs.link/?u=93514b
CMU200: https://defs.link/?u=8ccd72
Polarad SPN: https://defs.link/?u=2ead82

Siglent

SDM3065X: https://defs.link/?u=1ed0fe https://defs.link/?u=12d498
SDS1104X-E.
SDS2102 (hacked to 340MHz): https://defs.link/?u=1ed0fe https://defs.link/?u=12d498
SDS2104 X Plus.
SPL-1008.
SDP1168X: https://defs.link/?u=1ed0fe https://defs.link/?u=12d498
SDL1020X-E: https://defs.link/?u=a0eccb

Other Equipment

UNI-T UTi260B Thermal Imager: https://defs.link/?u=f3283d7 (use discount code: BG45411)
KSGER T12 Soldering Iron: https://defs.link/?u=620ace http://defs.link/?u=5c112e
Quick 861DW: https://defs.link/?u=138c0f https://defs.link/?u=a3fc81
Pro'skit SS-331 Desoldering Station: https://youtu.be/o_OKRknuoCM
S-993A: https://defs.link/?u=079677 https://defs.link/?u=e855a0
EEVBlog BM235: https://defs.link/?u=12d498
YR1030 Battery ESR: https://defs.link/?u=c56527
Heathkit IT-12 Signal Tracer.
Racal Dana 1992: https://defs.link/?u=8eeeba
Bird 43: https://defs.link/?u=4b18f7
Sinadder 3: https://defs.link/?u=2bf1dd
Audio Control SA-3050A RTA: https://defs.link/?u=a04df2
Korad KA3305D: https://defs.link/?u=69090a
PDVS2mini: https://defs.link/?u=869ba4
Valhalla 2703: https://defs.link/?u=06bcfc
Feeltech FY6800: https://defs.link/?u=8b98cd http://defs.link/?u=34d101
Eakins Microscope: https://defs.link/?u=b0278b https://defs.link/?u=262327
Mustool G600: https://defs.link/?u=b8bc26 https://defs.link/?u=33f0aa
Uni-T UT210E: https://defs.link/?u=391ce3 https://defs.link/?u=ea4edc
DER DE-5000: https://defs.link/?u=0d9160 https://defs.link/?u=12d498
MK-328: https://defs.link/?u=0d9160 https://defs.link/?u=739ee7
MESR-100: https://defs.link/?u=0d9160 https://defs.link/?u=009419
ESR Meter: https://defs.link/?u=0d9160
HOPI: https://defs.link/?u=7fab55
PeakMeter PM6252: https://defs.link/?u=59ef66
HS1010: https://defs.link/?u=10c699