July 31, 1987 HD-1416 Bulletin No: Code Practice Oscillator HD-1416-1 Cabinet Color Change The commincations products are changing from a brown to a black/gray color scheme. Below is a listing of the part numbers for the different color cabinet parts. Description Brown Cabinets Black/gray Cabinets ---------------- ---------------------- ---------------------------- Cabinet PN 95-98-1 PN 95-98-2 Front Panel PN 203-1671-2 PN 203-1671-4 Knob PN 462-1136 PN 462-1278 The PN 203-1671-3 black/gray front panel had the HD-1416A model number printed on it and was purged from stock. The -4 front panel has the HD-1416B printed on it. Heath Parts Replacement is stocking both color parts. -------------------------------------------------------------------------------------------------------------------- October 28, 1988 HD-1416 Bulletin No: Code Practice Oscillator HD-1416-2 Transistor C3 Change The output transistor at Q3 in the HD-1416A has a different generic and part number than the one used in the HD-1416H. The "A" uses a 2N5249A [PN 417-213] transistor at Q3; the "H" uses a 9014 [PN 230-8391]. This change was made because Prokit, the vendor for the "H" model kits, couldn't supply the 2n5249A transistor. However, for replacement purposes, these two transistors are interchangeable. -------------------------------------------------------------------------------------------------------------------- Thats everything I hold up to 1989 that covers the HD-1416. Enjoy! -------------------------------------------------------------------------------------------------------------------- 73 de Joe W7LPF/4 [NNN0KUU] QWCA - SOWP - NCVA - FISTS - RCC Gordonsville, Va 22942 [Orange Co]