Inductors and Transformers

This page has winding information for the inductors and transformers that will need to be wound for the DSP-610 transceiver.

Inductors:

L1 - L4 are SMT components just solder them on.

L1 - L5 on the PA board  are SMT components just solder them on.

L5, L6 and L7 are air-core wire-wound inductors consisting of 5 turns of bare #24 wire wrapped around a #1 (0.228", 5.8mm) drill bit the overall length of the inductor is 0.6" (1.5mm)

*** NEED PICTURE ***

L8 - L21 are SMT components just solder them on.

L22 and L23 (L10 and L11 on the PA board) consist of 5 Turns (5", 130mm) of #22 enameled wire on a T50-6 Core, scraped and tinned

L24 and L25 (L7, L8 and L9 on the PA board) 7 Turns (6", 150mm) of #22 enameled wire on a T50-6 Core, scraped and tinned

L26 and L27 are SMT components just solder them on.

L6 on the PA board two loops of #18 wire through a BN43-202 Core. The wires are cut to 3" (75mm) each and stripped so that the insulation is 1 5/8" (65mm) long.

Transformers:

T1 his 2 windings on a FT37-43 toroid: the primary consists of 2 turns of #26 enameled wire, stripped and tinned; the secondary is 13T of #26 enameled wire. It's best to wind the secondary first then wind the primary over the secondary. Try to form the leads to match the pads in the PCB.

*** NEED PICTURE ***

T2 consists of 4 windings. 2 windings each using 18" (450mm) of #30 Kynar wire, 10 turns, one winding through each hole in

a BN43-202 core. There are also 2 single turn windings of #22 teflon wire, one through each opening in the core. Detailed winding instruction can be found on the Hardrock-50 T3 winding instructions page.

T3 is wound an an RF Parts T-.75 core with 3 turns of #18 teflon wire (4 turns if its T3 on the PA Board). Detailed winding instruction can be found on the Hardrock-50 T2 winding instructions page This is what it looks like installed on a Hardrock-50 PCB.