FuseAfter installing some batteries, there was no response to any switch position. The fuse was blown.
1-1/4" (32mm) long x 1/4" (6.3mm) dia (3AG); 5 Amp @ 250 Volts on the blown fuse.
The manual says 2.5 Amp Fuse.
27 Oct 2017 - Installing the new fuse did NOT fix the problem.
There are three batteries:
This is a common "C" battery.
BT-2 & BT-3
This is a stack of three each BA-1312 batteries.
I ordered LR50 cells as replacements for the BA-1312 mercury battery(Wiki) .
The LR50 is the correct size and a stack of three of them fit correctly. Note that the LR50 batteries on eBay don't have brand names.
My web page for the TS-183 Battery Test set lists the BA-1312 as follows:
Battery Type No. Jack No. Minimum
Used On Replacement BA-1312/U
4 1.00 19.7 PAS-5, SU-43/PAS-6 IR viewer, PDR-10, PQS-1(XN-1), USM-223, VRC-53, VRC-64, KS-19B, GRC-9 Bias Battery Duracell: PX1, RM1N, RM1R,
EverReady: 1, 1A, EVG PC1A,
Gold Peak: PC1A, I.E.C. LR50,
NEDA 1100M, 1109M, 1110MP,
Rayovac RPX1, T1N,
Varta V1PX, VPX1
Operator's, Organizationalo, Direct Support, and General Support Maintenance
Repair Parts and Special Tools List (Including Depot Maintenance Repair Parts and Spedial Tools List) for
13 September 1974
Organizational, Direct Support, and General Support Maintenance Repair Parts and Special Tools List for
PRC68, Alphanumeric Index of Web pages, Contact, Products for Sale