Lester Veenstra M0YCM wrote: > I have a bad 10544 (received from AST) that I am planning to look into. > No 10 MHz out and very low 12 VDC current. > Has anyone the translation from HP PN to Commercial equiv for the > semiconductors ? > Thanks > Les > > Lester B Veenstra > M0YCM K1YCM K1YCM/6Y5 > > Mail Address: > > Lester Veenstra > PSC 45 Box 781 > APO AE 09468 > > Telephones: > > Office 940-6456 > Office +44-(0)1423-846-385 > Home: +44-(0)1943-880-963 > UK Cell +44-(0)7716-298-224 > > Lester
A parts conversion list is available at http://www.hparchive.com/PARTS/300-hpxref.pdf The part numbers on the circuit schematic are somewhat abbreviated. 54-215 = 1854-0215 = 2N3904. 53-20 = 1853-0020 = 2N3905?? my guess this should work. but stick a ferrite bead on the base as this device may oscillate with all 3 terminals AC grounded. 26-59 = 1826-0059 = ?? some low bias current opamp with external frequency compensation LM208?? 3-347 = 1853-0347 = MJE700 PNP power Darlington 4-560 = 1854-0560 = MPSA12 NPN small signal darlington 5-10 = 1853-0010 = 2N2646 unijunction transistor 01-535 = 1901-0535 = Silicon RF detector diode probably not Schottky. 02-033 = 1902-0033 = 1N823 6.2V temperature compensated zener reference diode. Bruce _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts