Tools, APP Software Used etc.

kicad 7

Description

Flesher_Filter.kicad_pcb

I wanted to add 425 Hz and 850 Hz shifts to my Heathkit HD-3030 RTTY terminal unit (circa 1983). So, I used KiCAD to design a drop-in replacement Active Filter board. Parts layout is nearly exactly the same as the original with each part designator silk-screened in its footprint. The board is just a wee bit wider than the original on the left side, so the hold-down bar is a tight fit. I used 25-turn trimpots instead of the original PC mount style for easier tuning. I also used .0047 uF capacitors instead of the original .005 uF. Also, JRC4558 vs MC1458 and J111 vs MPF111. The connector is available from DigiKey - PN WM14511-ND. Boards can be assembled using the Flesher TU-300 Universal Filter assembly manual available at navy-radio.com.

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Oct 08,2024

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Flesher_Filter.kicad_pcb

2 Layers PCB 44.55 x 89 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen

A direct replacement for Flesher Active Filter boards used in the TU-470, TU-300, TU-170A and Heathkit HD-3030 RTTY terminal units.

576

Published: Oct 08,2024

Standard PCB

Download Gerber file 6

BOM(Bill of materials)

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File Last Updated: 2024/10/09 (GMT+8)

File update record

2024-10-0904:02:37

Parts List (BOM) is updated.

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