Coaxial Cable Information Page
Alpha Wire Company catalog pages
Detailed technical specs from Belden
RG-174 data (Proposed by a vendor for HV connection between the generator and the base)
RG-178 data (Used for the toroidal transformer of the PMT Base)
RG-180 data (Used for carrying the PMT pulse signal from the base to the DOMMB)
Catch:
RG-174 uses polyethelene for insulation. 0.110" OD. Rated for 1100Vrms (max). The temperature rating is down to -40C.
Both RG-178 and RG-180 use teflon for insulation. The temperature rating is down to -70C. RG-180 is rated for 1100Vrms (max), whereas RG-178 is rated for 750Vrms(max).
RG-180 has an OD of 0.141" with a minimum bend diameter of 1.4". RG-178 has an OD of 0.071" with a minimum bend radius of 1".
The use of RG-178 for the toroidal transformer violates the nominal specifications, but the reliability has been tested and demonstrated to be okay by LBNL.
RG-180 appears to be superior to RG-174 in overall performance. The greater OD would not be a problem.
Trivia
RG/U--"RG" stands for "radio guide", a military term for the coaxial cable, and "U" stands for "universal", whatever that means.
BNC--Bayonet Neil Concelman, the inventor of the you-know-what.